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Everything on the site, in one place.
Every page on the site, in one list. Crawlers want the XML version.
Tools by category
Data Format Converters
- JSON to YAML Converter — Turn JSON into clean, readable YAML in the browser.
- YAML to JSON Converter — Convert YAML config files into valid JSON, instantly.
- CSV to JSON Converter — Turn spreadsheet exports into clean JSON arrays.
- JSON to CSV Converter — Flatten JSON arrays into spreadsheet-ready CSV.
- XML to JSON Converter — Parse XML feeds and SOAP responses into workable JSON.
AI & LLM Tools
- AI Token Counter — Estimate how many tokens your prompt will cost before you send it.
- LLM API Cost Calculator — Work out what your AI feature will cost per call and per month.
- Context Window Calculator — Check whether your document fits — and how much room is left to answer.
- llms.txt Generator — Publish a map of your site for AI crawlers and answer engines.
- JSON Schema Generator — Turn a sample JSON document into a validation schema.
SEO & Web Tools
- Robots.txt Generator — Build a correct robots.txt, including rules for AI crawlers.
- Meta Tag Generator — Generate title, description, Open Graph and Twitter card tags.
- SERP Snippet Preview — See how your page will look in search results before you publish.
- Schema Markup Generator — Build valid structured data for rich results.
- UTM Campaign URL Builder — Build tagged links that report cleanly in analytics.
Text & String Tools
- Diff Checker — Compare two texts and see exactly what changed.
- Regex Tester — Test a regular expression and see what each part of it does.
- URL Slug Generator — Turn any title into a clean, readable URL slug.
- Case Converter — Convert text between sentence, title, camel, snake and kebab case.
- Word Counter — Count words, characters, sentences and reading time as you type.
Encoding & Developer Tools
- Base64 Encoder & Decoder — Encode and decode Base64, including URL-safe and file input.
- URL Encoder & Decoder — Percent-encode and decode URLs and query parameters.
- JWT Decoder — Inspect a JSON Web Token's header, claims and expiry.
- Hash Generator — Generate cryptographic hashes for text or files.
- UUID Generator — Generate cryptographically random UUIDs in bulk.
Image & Asset Tools
- Image to Base64 Converter — Turn an image into a data URI you can inline in HTML or CSS.
- SVG to Data URI Converter — Inline SVGs in CSS at a fraction of the Base64 size.
- EXIF Metadata Viewer — See what a photo reveals — camera, settings, and location.
- Favicon Generator — Produce every favicon size and the HTML to go with it.
- Colour Palette Extractor — Pull the dominant colours out of any image.
Guides
- Why YAML quietly turns Norway into false — 16 September 2026