Developer Tools
Formatters, encoders, converters and generators for everyday development work. Input is processed locally in your browser — handy when the data includes tokens or private payloads.
Data-format tools cover JSON, CSV and XML; the colour tools convert HEX, RGB and HSL and check WCAG contrast.
JSON Formatter
Format, minify and validate JSON instantly.
Base64 Encode / Decode
Encode text to Base64 or decode Base64 back to text.
URL Encode / Decode
Percent-encode text for URLs, or decode it back.
UUID Generator
Generate cryptographically random UUID v4 values.
Unix Timestamp Converter
Convert Unix timestamps to dates and back.
Hash Generator
Generate SHA-256, SHA-384 and SHA-512 hashes.
JWT Decoder
Decode a JWT's header and payload — no verification.
Color Converter
Convert between HEX, RGB, HSL and CMYK instantly.
Hex to RGB Converter
Convert a hex color code to RGB instantly.
RGB to Hex Converter
Convert RGB values to a hex color code instantly.
JS Minifier
Minify JavaScript to reduce file size.
JS Formatter
Format and beautify messy JavaScript code.
Regex Tester
Test regular expressions against text with live match highlighting.
Diff Checker
Compare two texts and see line-by-line differences.
CSV to JSON Converter
Convert CSV data to JSON, with proper quoted-field handling.
JSON to CSV Converter
Convert a JSON array of objects to CSV, ready to download.
XML Formatter
Pretty-print or minify XML, with clear error messages.
XML to JSON Converter
Convert XML to JSON, with a documented attribute/text convention.
Markdown Preview
Write Markdown and see a live, safely-rendered preview.
Cron Expression Generator
Build a cron expression with a plain-English explanation.
Color Contrast Checker
Check WCAG color contrast ratio for accessible text.
Color Palette Generator
Generate a random color palette, with colors you can lock.
CSS Gradient Generator
Build a linear CSS gradient visually and copy the code.
Meta Tag Preview
Preview how your title and description look in search results.
URL Slug Generator
Convert text into a clean, URL-safe slug.
Image to Base64
Convert an image to a Base64 data URL — or decode Base64 back to an image.