ToolsGuru

Performance & Analysis

Tools for analyzing performance, bundle sizes, and creating visual code representations.

10 tools available

Lighthouse Viewer

Popular

Analyze website performance, accessibility, and SEO with Google Lighthouse audits.

Updated today

Bundlephobia Analyzer

Check npm package sizes before installation to optimize your bundle size.

Updated today

Carbon Code Screenshots

Create beautiful, shareable code screenshots with customizable themes and styling.

Updated today

SEO Site Crawler

Popular

Professional website crawler to find 404s, 5xx errors, duplicate content, missing meta descriptions, and technical SEO issues

Updated today

Sitemap URL Extractor

Extract and analyze all URLs from sitemap.xml files to audit your website structure and discover all indexed pages

Updated today

URL Status Checker

Check HTTP status codes of URLs to verify accessibility, response times, and redirects. Test single or multiple URLs at once.

Updated today

Backlink Checker

Popular

Verify backlinks pointing to your website and analyze their quality, anchor text, and link type (dofollow/nofollow).

Updated today

Meta Tag Generator

Popular

Generate complete SEO meta tags, Open Graph, and Twitter Card markup with live preview.

Updated today

Robots.txt Generator

Build a correct robots.txt with user-agent rules, sitemaps, and crawl directives.

Updated today

Keyword Density Checker

Analyze keyword density and frequency of one-, two-, and three-word phrases in any text or page copy.

Updated today

About our performance & analysis

Technical SEO and performance issues are invisible until you go looking for them: broken links quietly accumulating, pages missing meta descriptions, bloated JavaScript bundles, or a robots.txt that blocks the wrong crawler. ToolsGuru's analysis tools help you find these problems before they cost you rankings or users.

The suite includes a full SEO site crawler that finds 404s, duplicate content, and missing metadata across your site; a sitemap URL extractor; a bulk URL status checker; a backlink verifier; a Lighthouse report viewer; and Bundlephobia integration for checking npm package weight before you ship it. For creating rather than auditing, the meta tag generator builds complete Open Graph and Twitter Card markup with live previews, the robots.txt generator produces correct crawler directives, and the keyword density checker analyzes your copy's phrase distribution.

These tools are used by site owners preparing for AdSense review, developers auditing before a launch, and SEO practitioners doing routine health checks. Everything is free, with no account required and no limits on how many URLs you check.

Why choose ToolsGuru

Find issues first

Catch 404s, duplicate titles, and missing meta tags before search engines penalize them.

Complete SEO markup

Generate meta tags, Open Graph, Twitter Cards, and robots.txt with live previews.

Bulk checking

Test hundreds of URLs' status codes and redirects in one run.

No account needed

Audit any site instantly — yours or a competitor's — without signing up.

Frequently asked questions

How many pages can the site crawler check?

The crawler follows internal links from your starting URL and reports status codes, titles, meta descriptions, and heading structure for each page it finds. Crawl depth and page count are configurable; large sites are crawled progressively so you can watch issues appear in real time.

What meta tags do I actually need for SEO?

At minimum: a unique title (50–60 characters), a meta description (150–160 characters), and a canonical URL. For social sharing, add Open Graph and Twitter Card tags. The meta tag generator produces all of these with a live preview of how your page will look in Google and on social feeds.

What keyword density should I aim for?

There is no magic number — modern search engines evaluate topical relevance, not keyword counts. Use the density checker to catch accidental over-repetition (generally keep any single phrase under 2–3%) and to verify your important terms actually appear in your copy.

Will a robots.txt mistake hurt my site?

It can — a misplaced Disallow rule can deindex your entire site. The robots.txt generator builds syntactically correct files and makes the scope of each rule explicit, which is much safer than hand-editing.