Free & Browser-Based
SEO Tools
Analyze and generate everything you need for on-page and technical SEO — meta tags, keywords, headings, schema, sitemaps and more. Every tool runs instantly in your browser, no account or paid SEO database required.
16 free tools
Meta Tag Analyzer
Check title tags, meta descriptions, canonical tags and on-page signals.
Open Tool →Keyword Density Checker
Check keyword frequency, density and word count for any text.
Open Tool →SEO Heading Checker
Analyze H1–H6 headings and spot structural problems.
Open Tool →On-Page SEO Checker
A full check of titles, headings, links and images.
Open Tool →SERP Snippet Preview
See how your title and description look in Google.
Open Tool →Structured Data Checker
Find and validate JSON-LD schema markup.
Open Tool →Slug / URL Generator
Turn any title into a clean, SEO-friendly URL slug.
Open Tool →Readability Score Checker
Score your content's reading ease and grade level.
Open Tool →Open Graph & Twitter Card Checker
Check how a page looks when shared on social media.
Open Tool →Hreflang Tag Checker
List every language/region hreflang tag on a page.
Open Tool →Meta Tags Generator
Get a ready-to-paste <head> meta tag snippet.
Open Tool →Robots.txt Analyzer
Fetch and review a website's crawl directives.
Open Tool →XML Sitemap Checker
Validate a sitemap URL and count the URLs it finds.
Open Tool →XML Sitemap Generator
Download a ready-to-upload sitemap.xml file.
Open Tool →Broken Link Checker
Scan a page's links and flag ones that don't load.
Open Tool →Title & Meta Length Checker
Check if your title/description fit Google's limits.
Open Tool →About These SEO Tools
Search engine optimization comes down to a lot of small, checkable details — a missing canonical tag, a title that's too long, a heading structure that skips levels, a sitemap that hasn't been updated in months. Individually these are minor, but together they add up to the difference between a page that ranks and one that quietly gets ignored.
Most SEO checkers either require a paid subscription or send your page content to a third-party server before showing you results. Every tool on this page works differently: they run entirely inside your browser using JavaScript, which means your content, HTML and URLs are never uploaded anywhere. That makes them safe to use on client sites, unpublished pages, or anything under an NDA.
These 16 tools cover the two sides of SEO that matter most for day-to-day publishing: on-page checks (meta tags, headings, keyword density, readability, schema) that you'd run before hitting publish, and technical checks (robots.txt, sitemaps, hreflang, canonical tags) that you'd run periodically to make sure nothing has quietly broken. Bookmark this page and run a page through the relevant checker any time you publish or update content.
Frequently Asked Questions
Are these SEO tools really free, with no hidden limits?
Yes. There's no sign-up, no usage cap, and no premium tier — every tool on this page is free to use as many times as you need. They're built to run entirely in the browser, which means there's no server cost per use that would require charging for access.
Do I need to install anything or create an account?
No installation and no account. Each tool is a webpage — open it, paste in your content or URL, and get results immediately. Nothing to download, no browser extension, no login wall.
How do these compare to paid tools like Ahrefs or SEMrush?
They're not a replacement for full SEO suites — this collection doesn't do backlink analysis, keyword research volume data, or competitor tracking, since those require large licensed databases. What it does cover well is on-page and technical auditing: checking that the HTML fundamentals of a specific page are correct, which is something you don't need a paid database for.
Can I use these tools for client SEO audits?
Yes. Since everything runs locally in your browser and nothing is uploaded to a server, these tools are safe to use on client sites, staging environments, or pages that aren't public yet — nothing about the page content leaves your machine.
How often should I run these checks on my content?
Run the on-page tools (meta tags, headings, schema, readability) every time you publish or significantly edit a page. Run the technical tools (robots.txt, sitemap, hreflang) periodically — monthly is reasonable for most sites — or right after a site migration, redesign, or CMS change, since those are the moments technical SEO tends to break silently.
Do these tools work on any website, or only WordPress?
They work on any website, regardless of what platform or CMS it's built on. Since most of the tools work by analyzing HTML you paste in or a URL you provide, they're platform-agnostic — WordPress, Shopify, a static site, or anything else works the same way.