Download the Free JavaScript SEO Audit Tool:Install in Under 5 Minutes

Free JavaScript SEO Audit Tool refers to a no-cost, code-based library, such as @power-seo/audit, that scans a webpage's meta tags, content, structure, and performance signals, then returns a 0-to-100 SEO (Search Engine Optimization) score inside a JavaScript or Node.js project, with no subscription, signup, or external API calls required.

This guide covers what these tools do, how they fit alongside tools you likely already use, and how to get started in one command. The stakes for getting this right are measurable. Google/SOASTA research found that as mobile page load time increases from 1 to 3 seconds, the probability of a visitor bouncing rises 32%, and by 10 seconds, that probability climbs 123% (Google/SOASTA Research, 2017). A separate Google report on mobile speed found that 53% of mobile visitors abandon a site that takes longer than 3 seconds to load.

Catching regressions like this early, in code, before deployment, is a large part of why performance checks belong inside the dev workflow rather than after launch, an approach web.dev (Google's own performance guidance site) also recommends.

Key Takeaways

• A free JavaScript SEO audit tool is a code-based SEO checker that analyzes webpages and returns an SEO score directly inside JavaScript or Node.js projects, with no subscriptions or external APIs required.

• Tools like @power-seo/audit (distributed via the npm registry) audit core SEO factors: meta tags, content quality, headings, internal links, schema markup, images, and performance signals.

• It complements industry tools like Google Lighthouse (performance testing), Screaming Frog SEO Spider (technical crawling), and Ahrefs (backlink/SERP research) rather than replacing them.

• Unlike browser-based SEO platforms, it runs inside your dev workflow and can check SEO health automatically during CI/CD deployments.

• Install with npm install @power-seo/audit to generate your first SEO score in minutes, with no signup, payment, or API keys needed.

What Is a Free JavaScript SEO Audit Tool?

A free JavaScript SEO audit tool is an installable code package, typically distributed via npm, that scans a webpage or HTML source and returns SEO diagnostics (score, passed/failed checks, recommendations) at no cost and without requiring a paid plan, subscription, or third-party API key. "Free" here specifically means:

• No license fee: the package itself is open to install and use without payment (@power-seo/audit, for example, installs with a single npm install command).

• No API costs: checks run locally against the HTML/DOM you provide, rather than sending requests to a metered external service.

• No account required: there's no sign-up gate between installing the package and getting your first SEO score.

What Does This Free SEO Checker Actually Scan?

A free JavaScript SEO audit tool checks whether a JavaScript-powered website is easy for search engines to crawl, index, and rank. It analyzes meta tags, headings, structured data, broken links, content quality, page speed, and rendering issues. Developers use it to find SEO problems early, automate audits, and improve search visibility before deployment.

Why Is SEO Getting Harder for Developers?

SEO is becoming harder for developers because modern websites rely on complex JavaScript frameworks, dynamic rendering, and strict performance requirements. Traditional SEO checkers usually analyse finished websites, but they do not help developers catch SEO issues during development.

Google now evaluates factors like Core Web Vitals, page speed, structured data, and user experience. For JavaScript applications, problems like missing metadata, poor rendering, and crawlability issues can reduce search visibility.

A developer-focused SEO tool helps teams find and fix these issues before deployment. The free JavaScript SEO audit tool makes it easier to test technical SEO directly inside your workflow with npm install @power-seo/audit.

Claim Your Free Developer-First SEO Analysis Tool

That gap is exactly what a free JavaScript SEO audit tool fills. Instead of depending on online services like Seositecheckup or expensive enterprise crawlers, developers now have another option. They can run a complete SEO audit programmatically inside their Node.js environment.

The result is structured, actionable reports. There are no external API calls, no subscription fees, and no disruption to the development workflow. It effectively combines the convenience of an online SEO checker with the flexibility of a developer-first automation tool. In short, it behaves like a free website audit that also acts as a proper site audit tool for engineers.

Get started now: installation takes under a minute and the first audit runs immediately after. In this guide, you'll learn what a JavaScript SEO audit tool is. You'll also learn why it's worth using and how to get started with @power-seo/audit in under five minutes. You'll see which SEO problems it solves and who benefits most. You'll also see how it compares with popular alternatives such as Screaming Frog, Lighthouse, Ahrefs Site Audit, SEO Site Checkup (Seositecheckup), and other website SEO checker platforms.

Maybe you're looking for a quick SEO site checkup, building automated CI pipelines, or evaluating the latest JavaScript SEO testing tools. This guide is for you. You'll see why a developer-first approach is becoming the preferred way to run technical SEO audits. Along the way, this article also covers where an on-page SEO tool fits next to an ai for seo workflow. It also looks at why some engineers still ask whether seo screaming frog is worth the licence fee.

Why Download @power-seo/audit Today

Most website checkers or site checker tools are built for marketers, not engineers. They live in a browser tab, require manual input, and produce PDFs you forget about by Friday.

A JavaScript SEO audit tool flips that model entirely. The audit is code, it runs automatically, and it blocks bad deployments before they reach production. That is exactly the problem the team at CyberCraft Bangladesh set out to solve when they built @power-seo/audit. It is a free, open-source SEO audit engine designed from the ground up for developers. It is built for developers who want SEO quality control baked into their workflow, not bolted on after the fact. You can see the full range of what the team builds on the CyberCraft Bangladesh services page.

Maybe you have searched for a free SEO audit tool or a free website audit. Or maybe you wanted a lightweight SEO analysis tool that does not ask for a credit card. This is built for exactly that use case.

The stakes go beyond Google, too. OpenAI introduced GPTBot in August 2023, and its published documentation confirms the crawler fetches raw HTML but does not execute JavaScript, meaning content injected client-side is invisible to it regardless of how Google eventually indexes the same page. Researchers at Onely have made a similar point about the broader category of AI crawlers, noting that this rendering gap can leave a large share of JavaScript-heavy sites effectively invisible to AI search engines.

Five Reasons to Download and Switch Now

Automation at scale: Running auditSite() on an array of page inputs changes the workflow completely. What used to be slow and manual becomes a fast, aggregated SEO analysis pipeline. You get a consolidated report with an average score, top recurring issues, and per-page results. In our own testing, running auditSite() across a 480-page documentation site returned a full report in a few seconds on a laptop, with no server required, though this is our internal test, not an independently audited benchmark. This makes it ideal for modern seo workflows and large-scale search engine optimisation site audit app use cases.

CI/CD quality gates: You can plug this into deployment pipelines as a search engine optimisation audit app gate. You can set thresholds like a minimum score of 75 and a maximum allowed error count. If the build fails, the pipeline exits with a non-zero status code and prevents broken pages from going live.

This is especially useful when comparing approaches like using Lighthouse for javascript seo audits versus custom tooling. Lighthouse, maintained as part of Chrome DevTools, is excellent for performance and Core Web Vitals but was not built as a dedicated SEO rules engine, which is the gap a purpose-built audit library is designed to close.

Zero subscription cost: As a free JavaScript SEO audit tool, @power-seo/audit has no usage limits and no API rate caps. There is also no monthly bill. Under the MIT License, as defined by the Open Source Initiative, software can be used, modified, and redistributed commercially with no royalty obligation, the licensing model @power-seo/audit ships under. This positions it alongside the broader ecosystem of open source seo audit tool and open source seo-tools github projects.

This makes it attractive for teams trying to avoid screaming frog licence costs. It also appeals to teams searching for a screaming frog licence key. It also appeals to teams evaluating alternatives to SaaS platforms like ahrefs site audit javascript rendering.

TypeScript-first: Full type coverage spans inputs, results, issues, categories, and severities. This means your IDE catches mistakes early and provides IntelliSense everywhere. This improves reliability for teams doing technical javascript seo audits, including top-rated teams for technical javascript seo audits. For these teams, correctness matters more than speed alone. See how this compares directly against a popular alternative in our Power-SEO vs Next-SEO breakdown.

Framework-agnostic: It runs anywhere JavaScript runs: Next.js, Remix, Vite, Express, Cloudflare Workers, Vercel Edge Functions, and Deno. This makes it flexible for any modern search engine optimisation audit app architecture.

Maybe you're comparing it to enterprise tools. Maybe you're building a free seo audit seo trust layer into your product. Either way, the fit is the same. It integrates cleanly without locking you into a specific stack or vendor.

Ready to switch? Get the free JavaScript SEO audit tool installed now and see your first score in minutes. Claim it with zero cost and zero commitment.

How to Download and Install @power-seo/audit (Step-by-Step)

@power-seo/audit is installed with npm and used to run automated SEO checks inside JavaScript projects. Install the package, configure audit rules, scan your pages, and review SEO scores across categories like metadata, performance, accessibility, and technical SEO. It also supports CI/CD workflows for continuous SEO monitoring.

Step 1: Install the Package Now

Install the package with your preferred package manager:

npm install @power-seo/audit
yarn add @power-seo/audit
pnpm add @power-seo/audit

Step 2: Run Your First Single-Page Audit

Import auditPage and pass a PageAuditInput object. Every field except url is optional. You can start with whatever data you have and expand coverage over time.

import { auditPage } from '@power-seo/audit';

const result = auditPage({
  url: 'https://example.com/blog/react-seo-guide',
  title: 'React SEO Guide, Best Practices for 2026',
  metaDescription: 'Learn how to optimize React applications for search engines with meta tags, structured data, and Core Web Vitals improvements.',
  canonical: 'https://example.com/blog/react-seo-guide',
  robots: 'index, follow',
  content: '<h1>React SEO Guide</h1><p>Search engine optimization...</p>',
  headings: ['h1:React SEO Guide', 'h2:Why SEO Matters', 'h2:Meta Tags in React'],
  images: [{ src: '/hero.webp', alt: 'React SEO guide illustration' }],
  internalLinks: ['/blog', '/docs/meta-tags'],
  externalLinks: ['https://developers.google.com/search'],
  focusKeyphrase: 'react seo',
  wordCount: 1850,
});

console.log(result.score);       // e.g. 84
console.log(result.categories);  // { meta: { score: 90 }, content: { score: 82 }, ... }
console.log(result.rules);       // array of all rule results with severity

Step 3: Run a Site-Wide Audit Today

For multi-page coverage, use auditSite(). Pass an array of PageAuditInput objects to get started. You will receive a consolidated report with an average score and the most frequently occurring issues across all pages.

import { auditSite } from '@power-seo/audit';

const report = auditSite({ pages: [page1Input, page2Input, page3Input] });

console.log(`Average score: ${report.score}/100`);
console.log(`Pages audited: ${report.totalPages}`);

report.topIssues.forEach(({ id, title, severity }) => {
  console.log(`  ${id} (${title}) [${severity}]`);
});

report.pageResults.forEach(({ url, score, rules }) => {
  const issues = rules.filter(r => r.severity === 'error' || r.severity === 'warning');
  console.log(`${url}: ${score}/100, ${issues.length} issues`);
});

Step 4: Set Up and Integrate Into Your CI/CD Pipeline

Add this script to your repository and call it from your GitHub Actions, GitLab CI, or any Node.js-capable pipeline. The process exits with code 1 if the audit fails, blocking the merge or deploy automatically.

import { auditSite } from '@power-seo/audit';
import { pages } from './test-pages.js';

const report = auditSite({ pages });

const SCORE_THRESHOLD = 75;
const ALLOWED_ERRORS  = 0;

const totalErrors = report.pageResults
  .flatMap(p => p.rules.filter(r => r.severity === 'error')).length;

if (report.score < SCORE_THRESHOLD || totalErrors > ALLOWED_ERRORS) {
  console.error(`SEO audit FAILED`);
  console.error(`  Average score: ${report.score} (min: ${SCORE_THRESHOLD})`);
  console.error(`  Critical errors: ${totalErrors} (max: ${ALLOWED_ERRORS})`);
  process.exit(1);
}

console.log(`SEO audit PASSED, average score: ${report.score}/100`);

Step 5: Try Individual Rule Runners

Now that you know how the pieces fit together, try running an audit on one of your own pages. Maybe you only care about a subset of checks. For instance, you manage meta tags through a separate CMS plugin. That's fine. You can import and run only the rules you need:

import { runMetaRules, runContentRules, runStructureRules, runPerformanceRules }
  from '@power-seo/audit';

const metaRules = runMetaRules(input);
const errors    = metaRules.filter(r => r.severity === 'error');
const passes    = metaRules.filter(r => r.severity === 'pass');

console.log(`Meta: ${passes.length} passed, ${errors.length} errors`);

What Problems Does Installing This Tool Solve?

A JavaScript SEO audit tool solves six recurring problems: manual and inconsistent SEO checks, regressions slipping into production unnoticed, thin content going undetected before publish, missing or broken structured data, unoptimized images hurting Core Web Vitals, and Google rendering JavaScript pages differently than expected. Each is addressed with an automated, repeatable check rather than a one-time manual review.

Problem 1: Manual, Error-Prone SEO Checks - Fix With Automation

Developers and content writers often check meta tags, heading structures, and image alt text by eye. Human audits are inconsistent, slow, and impossible to scale. auditPage() runs deterministic, rule-based checks in milliseconds, the same way every time.

Problem 2: SEO Regressions Slipping Into Production - Stop Them Now

A developer removes a canonical tag while refactoring. A content editor accidentally deletes the focus keyphrase from the H1. Without automated checks, these regressions go live unnoticed. The CI/CD integration pattern catches them at the gate. It acts as a safety net, the way a good SEO report tool should.

Problem 3: Thin Content Going Undetected - Catch It Before Publish

Pages with fewer than 300 words rarely rank well. Content rules include word count thresholds that flag thin pages as errors before they are indexed by Google. This gives writers actionable feedback at publish time.

According to Backlinko's analysis of 11.8 million Google search results, the average word count of a first-page result is 1,447 words, which is one reason a 300-word minimum is treated as a floor rather than a target.

Problem 4: Missing or Broken Structured Data - Get It Validated

JSON-LD schema is critical for rich results in Google Search. A Free JavaScript SEO Audit Tool with structure rules acts as a JavaScript structured data checker, validating schema objects on the page and performing JavaScript schema validation against expected type definitions. This helps catch malformed or missing markup before issues are discovered through Google's Rich Results Test.

Google's own Search Central documentation on structured data illustrates why this matters with published case studies: Nestlé measured an 82% higher click-through rate on pages that displayed as rich results compared to non-rich pages, and Rotten Tomatoes saw a 25% higher click-through rate after adding structured data to 100,000 pages.

Problem 5: Unoptimized Images Hurting Core Web Vitals - Fix Them Fast

Performance rules flag images served as JPEG where WebP or AVIF could reduce file size by 25 to 50 percent. They also detect images missing explicit width and height attributes, which can cause layout shifts. In addition, they identify pages without preconnect or preload hints for critical resources. These checks directly impact Google's Core Web Vitals scores, which is why teams increasingly use a Free JavaScript SEO Audit Tool to analyze these performance issues as part of a dedicated Core Web Vitals audit rather than treating them as a side effect of a broader SEO scan.

The scale of this problem is measurable. The 2025 Web Almanac, published by HTTP Archive, found images are the Largest Contentful Paint element on 85% of desktop pages and 76% of mobile pages, and that JPEG still accounts for 57% of those LCP images, down 4 percentage points from 2024, while AVIF adoption reached just 0.7%. WebP alone typically cuts file size by 25 to 35% versus JPEG at equivalent quality.

Problem 6: Google Rendering JavaScript Pages Incorrectly - Verify and Fix

One of the most nuanced problems in javascript rendering seo is that Google renders JavaScript pages differently from static HTML. This is a well-known problem for SEO teams running a client side rendering seo audit on a single-page application, and it is exactly why a spa seo audit looks so different from a standard HTML crawl. When content is injected by client-side JavaScript, Googlebot may not index it on the first crawl, a process Google's own documentation describes as a queued, two-phase render rather than a single pass, and one of the clearest sources of javascript indexing issues teams encounter.

Independent research backs this up with hard numbers. Onely's study of 6,000 websites found that 42% of JavaScript-rendered content never gets indexed at all, and that client-side rendered sites rank 67% lower on average than server-rendered equivalents, which is the strongest argument for running a server side rendering seo audit before launch rather than after.

In a separate crawl-delay experiment referenced in that same research, Googlebot needed roughly 9 times longer to reach a page buried behind JavaScript-loaded links compared with an identically deep page in plain HTML, which is effectively an informal form of googlebot javascript testing.

Using @power-seo/audit on server-rendered HTML output, the Free JavaScript SEO Audit Tool checks the HTML that Googlebot actually receives. It works as both a JavaScript crawlability checker and a page rendering SEO test in one step. Critical content, headings, and structured data must exist in the initial payload, not appear only after JavaScript execution.

This makes it easier to identify issues caused by Google rendering JavaScript pages, where important SEO elements may remain hidden and impact rankings. A Free JavaScript SEO Audit Tool is often paired with a dedicated JavaScript website crawler: the crawler discovers URLs, while the audit engine verifies whether each page is properly rendered and SEO-ready. For developers working with modern JavaScript frameworks, a Free JavaScript SEO Audit Tool provides a clearer view of what search engines actually see.

What Search Practitioners Say About JavaScript SEO

Short answer: JavaScript SEO problems occur when search engines or AI crawlers cannot properly access important content after a page is rendered. Experts recommend testing the final rendered HTML instead of relying only on source code to ensure content, metadata, and structured data remain crawlable.

According to Martin Splitt, developers should focus on how search engines view the rendered page because JavaScript execution can affect content discovery and indexing. A page may appear complete in a browser but still have missing SEO elements if they are not available during crawling.

Googlebot indexes the rendered version of JavaScript pages, not only the original HTML source. Client-side rendering can create SEO challenges when important text, headings, links, or schema depend entirely on JavaScript execution.

AI search systems also require accessible and structured content signals. If critical information appears only after JavaScript runs, crawlers may struggle to understand the page correctly.

A Free JavaScript SEO Audit Tool like @power-seo/audit analyzes the final page output to identify rendering issues, missing SEO elements, and crawlability problems. This helps developers ensure JavaScript websites are optimized for Google Search and modern AI-powered search experiences.

Who Should Download the Free JavaScript SEO Audit Tool?

The free JavaScript SEO audit tool is used by developers, SEO professionals, digital marketers, agencies, and website owners who need to find and fix technical SEO issues quickly. It helps engineering teams improve website performance, validate SEO rules during development, and maintain search-friendly websites through automated audits.

The primary users of @power-seo/audit fall into five groups.

Full-Stack Developers and DevOps Engineers: These are teams building Next.js, Remix, or Astro applications. They want SEO quality gates in their CI/CD pipelines alongside unit tests and linting. They use auditSite() in GitHub Actions to block deploys when scores drop below a threshold, effectively running a free seo audit for react apps and a free seo audit for next.js on every pull request.

SEO Agencies and Consultants: Agencies managing SEO as a service for multiple clients integrate the tool into automated reporting pipelines. auditSite() produces per-page and aggregated results. These can be exported into client dashboards without manual effort, the way a client-facing SEO report tool would.

Headless CMS Teams: Publishers using Contentful, Sanity, Strapi, or similar platforms run auditPage() in a webhook triggered by content saves. If the SEO score is below 70, the article is flagged for review before it is published.

SaaS Platforms with Content Features: Any SaaS product that lets users create pages, blog posts, or product listings fits here. It can embed the audit engine server-side and surface an SEO score widget to end users. This gives them the kind of real-time feedback typically associated with paid tools like Yoast SEO. For a look at how this fits an AI-assisted content pipeline specifically, see AI SEO Tool: Zero Dependencies, Instant Setup & Use.

Independent Developers and Indie Hackers: This group is solo developers. They want a free, local alternative to premium tools for their personal projects, portfolios, or side businesses. Otherwise, they would be stuck choosing between a paid site audit tool and doing everything by hand. Our SEO npm package for React guide walks through exactly that decision.

Whichever group you're in, get started free today by running npm install @power-seo/audit.

Is @power-seo/audit Better Than Other SEO Audit Tools?

The honest answer is that it depends on your use case. A Free JavaScript SEO Audit Tool like @power-seo/audit is ideal for programmatic, in-codebase, and CI/CD-integrated SEO auditing at zero cost. However, it is not a crawler, has no backlink data, and does not replace Screaming Frog’s crawl depth, Ahrefs’ link intelligence, or Lighthouse’s Core Web Vitals measurement. Here is a feature-by-feature comparison against these four alternatives.

vs. Screaming Frog SEO Spider

Screaming Frog is the gold standard for desktop-based site crawling and is excellent for marketing teams auditing existing live sites. However, it has no programmatic API and cannot be integrated into a CI/CD pipeline. It also requires a paid licence for sites over 500 URLs. @power-seo/audit fills the developer workflow gap that Screaming Frog leaves open. It is not a crawler, but it is a first-class code library. It is also a far cheaper on-page SEO tool for teams that already live inside a codebase.

vs. Google Lighthouse

Lighthouse is the best free tool for performance auditing and Core Web Vitals measurement, but its SEO checks are thin. It validates a handful of meta tag basics and does not offer content analysis, keyphrase density, or schema validation. @power-seo/audit is narrower in scope than Lighthouse for performance but significantly deeper for SEO-specific rules.

vs. Ahrefs Site Audit

Ahrefs Site Audit is a cloud-based crawling platform with outstanding backlink and keyword data. These are capabilities that @power-seo/audit does not attempt to replicate. For teams that need link intelligence and SERP data, Ahrefs remains the best choice. For teams that need on-page SEO quality gates in their codebase at zero cost, @power-seo/audit wins clearly.

vs. next-seo

next-seo is a React component library for managing meta tags in Next.js applications. It is excellent for injecting tags at render time but does not audit or score anything. It has no rules engine, no severity system, and no CI integration. The two tools are complementary. Use next-seo to inject tags. Use @power-seo/audit to verify them, effectively pairing a tag manager with a real SEO analysis tool. Our full Power SEO Meta vs Next SEO comparison covers this pairing in more depth.

Ready to compare it yourself? Install @power-seo/audit and run a side-by-side audit on your own pages today.

Advantages: Try Them Free After Install

Zero runtime dependencies: No external packages to manage, no supply chain risk, no version conflicts.

Zero network calls: All computation is local and synchronous. Audits work offline, in air-gapped environments, and on Edge runtimes where outbound HTTP is restricted.

SSR and Edge runtime safe: No browser-specific APIs and no Node.js-specific APIs. Safe for Cloudflare Workers, Vercel Edge, and Deno.

Dual ESM and CJS output: Ships both formats via tsup, so it works with import syntax, require(), and any bundler.

Tree-shakeable: Side Effects false with named exports per rule runner means you bundle only what you use.

Four severity levels. error, warning, info, and pass give teams a nuanced view of issues. It is a prioritized view, rather than a binary pass or fail.

Category-level granularity: Each of the four categories produces its own 0 to 100 score. Teams can see whether their weakest area is meta tags, content, structure, or performance and focus effort accordingly.

Composable architecture: runMetaRules(), runContentRules(), runStructureRules(), and runPerformanceRules() can be called independently. This allows selective auditing without paying for the full audit overhead.

Supply chain security: There are no install scripts, no runtime network access, and no eval() or dynamic code execution. Releases are CI-signed npm releases via a verified GitHub workflow.

Try these advantages yourself: install the package now and see the results in your own project.

Known Limitations: Read Before You Install

No tool is perfect. Even a Free JavaScript SEO Audit Tool has some limitations, and being transparent about them helps build trust with your audience and search engines.

Not a web crawler: AuditSite() accepts page inputs. It does not crawl a live site and discover URLs automatically. You need to supply the list of pages yourself. This typically comes from a sitemap, a CMS API, or a file-based build system. In other words, it is a scoring engine, not a full search engine optimization tool suite with built-in crawling.

No backlink analysis: Off-page SEO signals like domain authority, referring domains, and anchor text distribution exist. These are outside the scope of an on-page audit tool. For backlink intelligence, a paid platform like Ahrefs or Majestic remains necessary.

No SERP data: Keyword ranking positions, search volume, and click-through rate data are not provided. This tool audits what is on the page, not how the page performs in Google search results.

Requires JavaScript environment: Non-technical users who are not comfortable with npm and Node.js will find the setup unfamiliar. It is a developer tool first, not a plug-and-play website audit tool for marketers.

Content must be pre-rendered: For client-side rendered apps, you need to pass the server-rendered HTML to the audit input. Do not pass the raw React component tree.

Weighed the trade-offs and still want in? Get started with a free install today. This is usually straightforward in SSR frameworks but requires an extra step in pure CSR setups.

No visual rendering: The tool does not render the page in a headless browser. It analyzes the structured data you pass to it. Teams that need to audit what Googlebot actually renders should combine it with a headless Chrome solution.

Where to Download the Free JavaScript SEO Audit Tool

You can find and download the free JavaScript SEO audit tool from the official npm package registry or its GitHub repository. Install it directly using npm, yarn, or pnpm, then follow the setup guide to integrate it into your project. @power-seo/audit is published on the npm public registry and is freely available under the MIT licence. Here are all the places you can access it.

npm registry: https://www.npmjs.com/package/@power-seo/audit, install with npm install @power-seo/audit

GitHub repository: github.com/CyberCraftBD/power-seo, source code, issues, and contribution guidelines

Package documentation: Full API reference, input parameters, return types, and usage examples are embedded in the npm package README

TypeScript types: Bundled with the package, no separate @types/ package required

About the team: @power-seo/audit is built and maintained by CyberCraft Bangladesh, a software development and full-stack SEO service provider. See their full product suite or website development services for related work.

Download it now and run your first audit in minutes, every link above is free to use.

The package is also available via yarn add @power-seo/audit and pnpm add @power-seo/audit. All three package managers install the same dual ESM/CJS bundle.

Frequently Asked Questions

What is a free JavaScript SEO audit tool?

A Free JavaScript SEO Audit Tool is a tool that analyzes JavaScript-based websites to find SEO issues such as missing metadata, rendering problems, crawlability errors, broken links, structured data issues, and Core Web Vitals problems.

Is @power-seo/audit really free to use?

Yes. @power-seo/audit is free and open-source under the MIT license. It has no usage limits, API keys, subscriptions, or rate limits. All audits run locally on your machine or server.

Does @power-seo/audit require an internet connection?

No. @power-seo/audit works completely offline because it makes no network requests and has no runtime dependencies. It is suitable for local development, private environments, and edge runtimes.

Can I use @power-seo/audit with Next.js or Remix?

Yes. @power-seo/audit is framework-agnostic and works with Next.js, Remix, Vercel Edge Functions, and Cloudflare Workers. You can run audits on the server without browser dependencies.

How is @power-seo/audit different from AI SEO tools?

@power-seo/audit is a deterministic SEO audit engine, not an AI content generator. It checks technical SEO factors with clear rules, while AI SEO tools focus on suggestions, content creation, and predictions. Both can work together.

What SEO audit score should I aim for?

A score above 75 usually means your page covers core SEO basics. For important pages, aim for 85+ and fix all critical errors in metadata, structure, and technical SEO.

References

1. Google Search Central. "Understand JavaScript SEO Basics." Google for Developers. https://developers.google.com/search/docs/crawling-indexing/javascript/javascript-seo-basics

2. OpenAI. "GPTBot." Platform Documentation. https://platform.openai.com/docs/gptbot

3. Chrome Developers. "Lighthouse overview." https://developer.chrome.com/docs/lighthouse/overview

4. Open Source Initiative. "The MIT License." https://opensource.org/license/mit