Developer utilities
Tools that work.
Without the friction.
Free, instant tools for developers and technical people. No signup. No data sent to servers. No ads that cover the thing you came to use.
Free online developer tools including a UUID v4 and v7 generator, Unix timestamp to date converter, cron expression parser, JWT decoder, YAML validator, and JSON formatter. All tools run entirely in your browser — no data is sent to any server, no account required.
// Encoding & Decoding
URL Encoder / Decoder
Encode or decode percent-encoded URL strings instantly. Toggle between encode and decode on a single page.
Base64 Encoder / Decoder
Encode text to Base64 or decode Base64 strings back to plain text. Supports URL-safe Base64.
Hash Generator
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from any text string.
JSON Formatter
Format, beautify, minify, and validate JSON. Client-side — your data never leaves the browser.
XML to JSON Converter
Convert XML documents to clean, readable JSON format instantly.
YAML Validator
Validate YAML syntax and convert YAML to JSON. Spot errors before they hit production.
SQL Formatter
Beautify messy SQL queries with proper indentation and keyword casing.
JWT Decoder
Decode JWT tokens and inspect header, payload, and signature without sending data to a server.
Timestamp Converter
Convert Unix timestamps to human-readable dates and back. Supports seconds and milliseconds.
Cron Expression Parser
Parse and explain cron expressions in plain English. See the next 10 scheduled run times.
Regex Tester
Test regular expressions with live match highlighting and capture group inspection.
JSON Validator
Validate JSON syntax with precise error messages showing line and column numbers.
UUID Generator
Generate UUID v4, sortable UUID v7, or legacy v1. Bulk generation, copy all, format options.
Text Case Converter
Convert between camelCase, snake_case, PascalCase, kebab-case, and more.