Developer Tools
Code formatting, encoding, conversion and debugging tools for developers.
JSON Formatter
Format, validate and auto-fix JSON. Repairs trailing commas, bad quotes and unquoted keys. Sort keys, minify, upload files and load from URL.
Regex Tester
Test regex with live highlighting. Match, Substitution and List modes. Capture groups, plain-English explainer, cheat sheet and "Why didn't it match?" hints.
Base64 Encoder
Encode and decode Base64. Base64URL, no padding, 76-char MIME chunks, per-line encoding, image to data URI, file upload and auto-strip data URI prefixes.
HEX to RGB Converter
Convert HEX to RGB, RGBA, HSL, HSV, CMYK, OKLCH and CSS instantly. Colour picker, RGB sliders, contrast checker and named colour reference table.
Unix Timestamp Converter
Convert Unix timestamps to dates and back. Batch mode for multiple timestamps. Auto-detects seconds, ms and microseconds. ISO 8601, RFC 2822, week number, code snippets.
Colour Palette Generator
Generate colour palettes from a base colour or extract from any image. 7 harmony types, 8 mood themes, 3–8 colours, lock and regenerate, copy CSS vars, download PNG.
CSS Gradient Generator
Build CSS gradients visually. Linear, radial, conic and repeating types. Per-stop opacity, colour format output, vendor prefixes, CSS selector and 20 categorised presets.
UUID Generator
Generate UUID v1, v4, v5, v7 and Nil. GUID braces format, bulk download, and a decoder that reads version and timestamp.
Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-384 and SHA-512 hashes. Bcrypt generator and verifier with adjustable cost rounds.
SQL Formatter
Format and minify SQL with a token-based parser. Handles subqueries, CASE blocks, 10 dialects, comma position and keyword case.
JWT Decoder
Decode and inspect JWT tokens. View header, payload, expiry and signature details instantly.
CSV to JSON Converter
Convert CSV to JSON with four output formats — array, keyed, JSON Lines and array of arrays. Upload files, auto-detect delimiter, parse types, transpose and download.
URL Encoder / Decoder
URL encode and decode with component or full-URL mode. Space as %20 or +. Encode per line. Built-in URL parser decodes every query parameter.
Text Diff Checker
Compare two texts with line, word or character-level diff. Side-by-side or inline view. Ignore whitespace and case. Similarity percentage shown.
HTML Formatter & Beautifier
Format and beautify messy HTML or minify for production
CSS Formatter & Minifier
Format, sort and minify CSS stylesheets
JavaScript Formatter & Minifier
Beautify or minify JavaScript code
Number Base Converter
Convert between binary, octal, decimal and hex
Cron Job Generator & Explainer
Build cron expressions with visual builder and explanations
Schema Markup Generator
Generate JSON-LD structured data for 15 schema types
SERP Snippet Preview
Preview how your page appears in Google search results
Box Shadow Generator
Generate CSS box-shadow and text-shadow with live preview
Markdown Editor
Write Markdown with real-time HTML preview
Robots.txt Generator
Build a robots.txt file with bot rules and sitemap
LLM Token Counter
Count tokens and estimate API costs for 10 LLM models
Mock JSON Data Generator
Generate realistic mock JSON test data from a custom schema
Colour Contrast Checker
Check WCAG AA and AAA colour contrast compliance
Open Graph Tag Generator
Generate Open Graph and Twitter Card meta tags