SEO Tools
Audit, preview and generate the on-page and technical pieces of SEO.
- 01
Meta Title & Description Length Checker
Check title and description length in characters and real pixel width.
- 02
SERP Snippet Preview Generator
See how your page will look in a Google result, on desktop and mobile.
- 03
Open Graph & Twitter Card Preview
Preview and generate the tags that control how links look when shared.
- 04
Meta Tag Analyzer
Scan pasted HTML for missing, duplicated or malformed meta tags.
- 05
Canonical Tag Checker
Validate a canonical tag and catch the mistakes that make it useless.
- 06
Robots Meta Tag Generator
Build noindex, nofollow and snippet-control directives without guessing syntax.
- 07
Favicon & Meta Tag Bundle Generator
Generate the complete head block: icons, theme colour, manifest and social tags.
- 08
hreflang Tag Generator
Build a correct, reciprocal hreflang set for multi-language or multi-region sites.
- 09
Keyword Density Checker
Measure how often each word and phrase appears, and flag over-optimisation.
- 10
Keyword Position Checker
Check whether your keyword appears in the title, H1, first paragraph and URL.
- 11
Readability Score Checker
Score text with Flesch, Gunning Fog, SMOG and Coleman-Liau, and find hard sentences.
- 12
Header Tag Structure Analyzer
Visualise your H1–H6 outline and catch skipped or duplicated heading levels.
- 13
Word Counter with SEO Benchmarks
Count words and compare against typical lengths for the page type you are writing.
- 14
Duplicate Content Checker
Compare two blocks of text and measure how much of them overlaps.
- 15
Image Alt Text Checker
Find images with missing, empty, duplicated or unhelpful alt attributes.
- 16
Keyword-in-URL / Slug Checker
Check a URL for length, depth, readability and keyword placement.
- 17
XML Sitemap Generator
Turn a list of URLs into a valid sitemap.xml, with a sitemap index for large sites.
- 18
Robots.txt Generator
Build a robots.txt with sensible rules and no accidental site-wide block.
- 19
Robots.txt Validator & Tester
Paste a robots.txt and test whether specific URLs are allowed or blocked.
- 20
Schema Markup (JSON-LD) Generator
Build valid JSON-LD for Article, Product, FAQ, HowTo, LocalBusiness and more.
- 21
Structured Data Validator
Extract and check the JSON-LD on a page against required properties.
- 22
.htaccess Redirect Generator
Build 301 redirect rules for Apache, Nginx or a redirects file.
- 23
Minify HTML, CSS & JS for Page Speed
Minify assets and see the transfer saving after gzip, with Core Web Vitals context.
- 24
URL Slug Generator & Cleaner
Clean messy URLs into short, readable slugs, one at a time or in bulk.
- 25
UTM Campaign URL Builder
Build consistent tracked campaign URLs and keep your analytics tidy.
- 26
Internal Link Anchor Text Analyzer
Find generic anchors like “click here” and see your internal link distribution.
- 27
Backlink Disavow File Generator
Format domains and URLs into a valid Google disavow.txt file.
- 28
Social Media Character Counter
Count against every platform's real limit at once, with URL and emoji handling.
- 29
Rich Link Preview Tester
Extract the sharing tags from your HTML and preview the card each platform builds.
- 30
QR Code Generator for Print Campaigns
Generate a print-ready QR code with UTM tracking and a size calculator.
- 31
SEO-Friendly Filename Renamer
Clean image filenames into descriptive, hyphenated, lower-case names.
- 32
Title Tag Pixel Width Simulator
Measure title width in pixels against a live Google-style result box.
- 33
Content-to-Code Ratio Checker
Measure how much of your page is visible text versus markup and script.
- 34
Broken Anchor Text Finder
Find links with no href, no text, or fragments pointing at missing IDs.
- 35
On-Page SEO Audit Generator
Score a page against 30 on-page checks and link straight to the tool that fixes each one.
About these seo tools
Thirty-five tools covering the parts of SEO you can actually check and fix yourself: what your page tells a search engine, how it will look in a result, whether the content is readable, and whether the technical files are correct. They all work on text and HTML you paste in, analysed locally in your browser — which means you can audit a staging site, an unpublished draft or a client page behind a login without any of it reaching a server. Start with the On-Page SEO Audit, which scores a page against every other check here and links you to the tool that fixes each problem.
Every tool has its own page, its own explanation and its own worked example, so you can bookmark the one you use most instead of hunting through a tab bar. They all work offline once the page has loaded, they all work on a phone, and none of them ask you to create an account or wait in a queue.
Other categories
Text & Writing Tools
Clean up, count, convert and reshape text without leaving your browser.
Image Tools
Thirty ways to compress, resize, crop, edit and convert images locally with the Canvas API.
Developer Tools
Formatters, generators and testers for everyday front-end and back-end work.
Calculators
Practical calculators for age, passwords, typing speed, loans and screens.