Free SEO Tools — Meta Tags, Sitemaps, Minifiers & Checks
A practical toolkit for on-page SEO, AI search and site performance. Generate the meta, Open Graph and Twitter tags that control how your pages look in search and social; build a sitemap, robots.txt and llms.txt so both search crawlers and AI assistants find the right pages; decide which AI crawlers may use your content; minify HTML, CSS and JavaScript to load faster; and check keyword density and canonical tags.
Almost everything runs in your browser — no signup, no limits. The one exception is the Canonical URL Checker, which fetches the page you name from our server so it can follow redirects.
🏷 Meta Tags3
📑 Files4
Sitemap Generator
Turn a list of URLs into a valid XML sitemap for search engines.
Robots.txt Generator
Create a robots.txt to control what crawlers can access.
llms.txt Generator
Build an llms.txt so AI assistants can find and understand your key pages.
AI Crawler Blocker (robots.txt)
Block ChatGPT, Claude & other AI bots from your site — without hurting SEO.
🗜 Minify3
🔬 Analyze2
Meta & social tags
- Meta Tag Generator — title, description, robots and canonical, with a live Google preview.
- Open Graph Generator — rich link previews for Facebook, LinkedIn, WhatsApp and Slack.
- Twitter Card Generator — summary and large-image cards for X, with a live preview.
Crawl control & AI search
- Sitemap Generator — a valid sitemap.xml from a list of URLs.
- Robots.txt Generator — allow/disallow rules with handy presets.
- llms.txt Generator — the llmstxt.org file that tells AI assistants what your site is and points them at your key pages.
- AI Crawler Blocker — a robots.txt that blocks GPTBot, ClaudeBot, Google-Extended and others without hurting your search SEO.
- Canonical URL Checker — verify rel=canonical and redirects on a live page.
Performance & content
- HTML, CSS and JavaScript minifiers to shrink assets and speed up load times.
- Keyword Density Checker — most-used words and phrases, plus target-keyword tracking.
Why on-page SEO still matters
Search and social platforms read your tags, not your intentions. A missing meta description, a wrong canonical, or an unshareable link quietly costs traffic — and slow, unminified pages hurt both rankings and conversions. These tools fix the fundamentals in minutes, and because they're free and unlimited you can use them on every page you ship.
Frequently asked questions
Are these SEO tools free?
Yes, all of them, with no signup and no usage limits. Most run entirely in your browser.
Do I need to upload my site?
No. The generators and minifiers work on text you paste, in your browser. Only the Canonical URL Checker fetches a page — the URL you enter is sent to our server so it can follow redirects.
What's the difference between the meta, Open Graph and Twitter generators?
Meta tags control how your page appears in Google search results; Open Graph tags control the preview card on Facebook, LinkedIn and most chat apps; Twitter Card tags control the card on X. A well-optimised page usually has all three.
Does minifying really speed up my site?
Yes. Smaller HTML, CSS and JavaScript files download faster and are parsed sooner, improving load time and Core Web Vitals — which are a ranking factor.
What is a canonical tag and why check it?
A canonical tag tells search engines which URL is the 'main' version of a page, preventing duplicate-content problems. A wrong or missing canonical can split ranking signals, so it's worth verifying.
What is llms.txt and do I need one?
llms.txt is an emerging convention (llmstxt.org) — a small Markdown file at your site root that tells AI assistants like ChatGPT, Claude and Perplexity what your site is and links to your most important pages. It's a low-cost way to be understood as AI search grows; it complements, rather than replaces, your sitemap and robots.txt.
How do I stop AI bots from using my content?
Use the AI Crawler Blocker to generate a robots.txt that disallows specific AI crawlers (GPTBot, ClaudeBot, Google-Extended and others). It leaves normal search engines like Google and Bing allowed, so your search SEO is unaffected.