Free SEO tools
Twenty-seven checkers for the things that decide whether a page can be crawled, indexed and clicked. Enter a URL, get a clear answer and a fix.
All free SEO tools
Full audit
Start here: one report that runs every on-page check at once.
Titles and meta tags
What search engines and social networks show for your page.
- Title Tag CheckerLength in characters and pixels, duplicates and a preview of the result in Google.
- Meta Description CheckerIs it there, is it the right length, and where will Google cut it off?
- Google Search PreviewSee your page as a Google result on desktop and mobile, and try new wording live.
- Open Graph CheckerPreview the link card for Facebook, LinkedIn, X and WhatsApp and validate the image.
- Canonical URL CheckerFind the canonical tag, see where it points and whether that address loads.
- Favicon CheckerEvery icon the page declares, with sizes, and whether Google can use one.
Content
Headings, wording, images and the shape of the URL.
- Heading Tags CheckerThe H1 to H6 outline of a page, with missing, repeated and skipped levels.
- Keyword Density CheckerThe most used words and phrases on a page and how often your keyword appears.
- Content Length CheckerWord count, reading time and text-to-HTML ratio of the main content.
- Image Alt CheckerLists every image with its alt text and flags the ones that are missing or empty.
- Deprecated HTML Tags CheckerFinds obsolete tags and attributes such as font, center and marquee.
- Friendly URL CheckerIs the URL short, lowercase, hyphenated and free of parameters and IDs?
Crawling and indexing
Whether search engines can reach the page and are allowed to list it.
- Robots.txt CheckerValidates robots.txt, tests your URL against it and shows which bots are blocked.
- Sitemap CheckerFinds and validates your XML sitemap and spot-checks that the listed URLs load.
- Noindex Tag CheckerCan this page be indexed? Checks meta robots, X-Robots-Tag and robots.txt.
- X-Robots-Tag CheckerReads the X-Robots-Tag HTTP header on every hop and explains each directive.
- Link CheckerTests the links on a page and reports broken ones, redirects and empty anchors.
Server and redirects
Status codes, redirect chains and the four versions of your address.
- HTTP Status CheckerThe status code, response headers and protocol a URL returns.
- Redirect CheckerFollows every hop of a redirect chain and shows 301s, 302s and loops.
- HTTPS Redirect CheckerDoes http:// redirect to https:// in one permanent hop? Also checks HSTS and mixed content.
- WWW Redirect CheckerTests all four versions of your domain and confirms they end at one address.
- Gzip CheckerIs the page compressed with gzip, Brotli or Zstandard, and how much does it save?
Speed and images
Page weight, Core Web Vitals and how images are delivered.
- Core Web Vitals CheckerLCP, INP and CLS from real Chrome users, plus what on the page is holding them back.
- Web Page Size CheckerHTML size, total page weight and request count, broken down by file type.
- Lazy Loading Images CheckerWhich images are lazy-loaded, which should be, and which must not be.
- Responsive Image CheckerViewport, srcset, sizes, dimensions and modern formats for every image.
What these tools check
Search engines can only rank what they can reach, read and trust. Each tool here answers one concrete question about a page: does it return the right status code, can it be indexed, is the title the right length, do the links work, is the page fast enough. Every result explains what was found, why it matters and how to fix it, in plain language.
If you are not sure where to start, run the On-Page SEO Checker. It downloads the page once and runs more than forty checks in a single report. Then open a dedicated tool for anything that needs a closer look.
How the tools work
The tools fetch the URL you enter from our servers, exactly as a search engine crawler would, and analyse the HTML and response headers that come back. Nothing is installed on your site and no access is needed. Pages are read, never stored. Private and internal network addresses are refused.
Because the tools read the HTML your server sends, content that only appears after JavaScript runs is not included. That is deliberate: it is the same view a crawler gets on its first request.
Free checks and accounts
Anyone can run 5 checks a day without signing up, counted across all tools. A free Upmonora account removes the limit, keeps a history of your checks in the dashboard, and includes uptime monitoring for five websites. Want to know whether a site is reachable right now? Use the free website checker.
Frequently asked questions
Are the SEO tools really free?
Do I need to create an account?
Which SEO tool should I start with?
Can I check a website I do not own?
Do the tools change anything on my site?
What does Upmonora do besides SEO tools?
SEO gets visitors to your site. Uptime keeps them there.
Monitor 5 websites free forever and get alerted the moment one goes down. No credit card required.