Developer tools
A focused collection of free developer utilities designed for quick, practical use.
- JSON Formatter & Validator — Beautify, minify and validate JSON locally.
- Base64 Encoder / Decoder — Encode and decode UTF-8 text.
- URL Encoder / Decoder — Encode or decode URL components.
- UUID Generator — Generate random UUID v4 identifiers.
- Regex Tester — Test regular expressions against sample text.
- Color Converter — Convert HEX colors to RGB and HSL.
- Timestamp Generator — Generate a current Unix timestamp instantly.
- HTML Entity Encoder — Encode or decode HTML special characters.
- SHA-256 Hash Generator — Create SHA-256 hashes in your browser.
- CSV to JSON Converter — Convert simple CSV data into JSON.
- JSON Key Explorer — Inspect JSON keys and value types.
- Number Base Converter — Convert binary, decimal, hexadecimal and other bases.
- JWT Decoder — Decode a JSON Web Token to read its header, payload and expiry.
- URL Parser — Split any URL into protocol, host, path, hash and query parameters.
- JSON Converter — Convert JSON to CSV, TSV or XML in one click.
- JSON Diff — Compare two JSON documents and list added, removed and changed keys.
- JSON ↔ YAML Converter — Convert JSON to YAML and YAML to JSON.
- YAML Formatter & Validator — Validate and neatly format YAML.
- XML Formatter — Validate, beautify or minify XML.
- String Encoder — Encode text as URL, Base64, hex, binary, HTML entities, Unicode and more at once.
- Charset Converter — Convert text to bytes in UTF-8, UTF-16 or Latin-1, and decode bytes back to text.
- Code Minifier — Minify CSS, JavaScript, HTML and JSON to reduce file size.
- SQL Formatter — Beautify SQL queries with clean keywords, line breaks and indentation.
- CSS Formatter — Beautify minified CSS into clean, readable code.
- HTML Formatter — Beautify or minify HTML with proper indentation.
- Unix Permission Calculator — Convert chmod permissions between checkboxes, octal and symbolic form.
- HTML, CSS & JS Playground — Write HTML, CSS and JavaScript and see the result live in a sandbox.
- Hash Generator (MD5, SHA) — Generate MD5, SHA-1, SHA-256, SHA-384 and SHA-512 hashes for text or files.
- Cron Expression Parser — Explain a cron expression in plain English and list its next run times.
- Cron Expression Generator — Build cron schedules with simple options and preview when they run.
- IP Subnet Calculator — Calculate network, broadcast, host range and masks from an IPv4 CIDR.
- CSS Unit Converter — Convert between px, rem, em, pt, vw, vh and percent.