Developer Tools
Format, validate, encode, decode, convert, hash, and inspect structured developer data.
What you can do with these tools
Use these tools for quick API, JSON, CSV, URL, token, color, regex, cron, and formatting tasks.
Developer utilities are designed for small focused snippets and return copy-ready output in the browser.
Developer tools
- ARIA Label Audit - Audit HTML snippets for missing accessible labels on common elements.
- Base64 Decoder - Decode Base64 strings into readable text.
- Base64 Encoder - Encode text or data snippets into Base64.
- Binary to Text - Convert binary byte values back into readable UTF-8 text.
- Border Radius Generator - Generate CSS border-radius shorthand from corner values.
- CSS Box Shadow Generator - Generate copy-ready CSS box-shadow declarations.
- CSS Clamp Generator - Generate responsive CSS clamp() values for fluid typography and spacing.
- CSS Grid Generator - Generate responsive CSS Grid layout snippets.
- CSS Minifier - Minify CSS by removing comments and unnecessary whitespace.
- CSV to JSON - Convert CSV rows into a JSON array of objects.
- Caesar Cipher - Encode or decode text with a configurable Caesar cipher shift.
- Color Contrast Checker - Check WCAG contrast ratio between foreground and background colors.
- Color Converter - Convert HEX and RGB colors into HEX, RGB, and HSL values.
- Cron Expression Generator - Build a five-field cron expression from schedule parts.
- Data Storage Converter - Convert bytes, KB, MB, GB, and TB for storage estimates.
- Flexbox Generator - Generate CSS Flexbox layout snippets from alignment settings.
- HTML Escape - Escape HTML-sensitive characters for safe display in markup.
- HTML Minifier - Minify HTML markup and report size savings.
- HTML Unescape - Convert common HTML entities back to readable characters.
- JSON Formatter - Format, validate, and minify JSON.
- JSON to CSV - Convert a JSON object array into CSV rows.
- JSON to YAML - Convert JSON into YAML for configuration and documentation.
- JWT Decoder - Decode JWT header and payload JSON without verifying the signature.
- JavaScript Minifier - Minify simple JavaScript by removing comments and extra whitespace.
- Markdown Table Generator - Generate Markdown table syntax from headers and rows.
- Markdown to HTML - Convert Markdown text into HTML markup.
- Meta Viewport Generator - Generate viewport meta tags with accessibility review notes.
- Number Base Converter - Convert numbers between binary, decimal, hexadecimal, and custom bases.
- PX to REM Converter - Convert pixel values into rem units using a selected base font size.
- Password Generator - Generate secure random passwords with length and character options.
- Password Strength Checker - Estimate password strength from length and character variety.
- Regex Tester - Test a regular expression against text and review matches.
- Responsive Breakpoint Helper - Generate media query snippets from common responsive breakpoints.
- SHA-256 Generator - Generate a SHA-256 hash for pasted text.
- SVG Optimizer - Clean and minify inline SVG markup for web use.
- Text to Binary - Convert UTF-8 text into space-separated binary bytes.
- URL Decoder - Decode percent-encoded URLs and query string values.
- URL Encoder - Percent-encode text for safe URL query strings and paths.
- UUID Generator - Generate one or more random UUID v4 values.
- Unix Timestamp Converter - Convert Unix timestamps to UTC dates and dates to timestamps.
- WHOIS Lookup - Look up public domain registration details through RDAP.
- Web App Manifest Generator - Generate a basic PWA web app manifest JSON file.
- XML Formatter - Format XML-like markup with readable indentation.
- YAML to JSON - Convert YAML into formatted JSON.
How to choose a tool
- Open the tool that matches the source file, text, or calculation you already have.
- Review the input rules and free daily limit on the tool page.
- Run the tool, then check the output before sharing, publishing, or replacing an original file.