Free online tools
Free online tools for SEO, websites, IT and AI
Generators, calculators and checkers we use ourselves on client projects. They run in your browser, with no sign-up and no limits.
Free SEO tools
Google result preview, meta tag generator, JSON-LD schema and robots.txt generators. Everything that speeds up technical SEO.
- Google SERP previewSee how your title and description look in Google and whether they get truncated.
- Meta tag and Open Graph generatorReady code for title, description, canonical, Open Graph and Twitter Card.
- JSON-LD schema generatorStructured data for Organization, LocalBusiness, FAQPage and Article.
- robots.txt generatorA robots.txt with blocked paths, a sitemap and an option to turn away AI bots.
Tools for websites
WCAG contrast checker, px to rem converter, favicon generator and website cost calculator. For people who build and commission websites.
- WCAG colour contrast checkerContrast ratio of two colours with AA and AAA results under WCAG.
- px to rem converterConvert px to rem and back, with a custom base and a value table.
- Favicon and manifest generatorA full favicon set, apple-touch-icon and manifest from a single image.
- Website cost calculatorAn indicative budget range for a website, shop or app.
Online IT tools
Password generator, JSON formatter, Base64 and URL encoding, UUID and hash generator. Everyday developer tools with nothing to install.
- Password generatorStrong random passwords generated in your browser.
- JSON formatter and validatorJSON formatting, minifying and validation with the line number of an error.
- Base64 and URL encoder and decoderBase64 and URL encoding and decoding with UTF-8 support.
- UUID and SHA hash generatorUUID v4 and v7 plus SHA-1, SHA-256, SHA-384 and SHA-512 hashes.
Online AI tools
A token counter with cost, a context window calculator, an llms.txt generator and a prompt builder. Practical tools for anyone working with language models.
- Token counter and LLM costToken count of a text and an approximate cost for popular models.
- LLM context window calculatorCheck whether a document or code fits in a model's context window.
- llms.txt generatorAn llms.txt file with a site summary and a list of key URLs for AI assistants.
- Prompt builderA prompt built from a role, context, task, constraints and reply format.
Every tool works out its result in your browser. What you type, including passwords and files, is never sent to our server.
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