Developer Tools
Client-Side Utilities for Modern Engineers
Fast, zero-tracking, client-side tools designed for software developers and students. No login or subscription required.
JSON Formatter & Validator
Format, beautify, inspect, and validate JSON data instantly with syntax highlighting.
JSON → TypeScript Converter
Convert raw JSON payloads into clean, strongly typed TypeScript interfaces.
JWT Decoder
Decode and inspect JSON Web Token header, payload, and signature securely client-side.
Regex Tester
Test regular expressions with real-time matching, group extractions, and cheat sheets.
SQL Formatter
Format and beautify complex SQL queries for PostgreSQL, MySQL, SQLite, and SQL Server.
Cron Expression Generator
Generate and parse crontab schedule expressions with human-readable explanations.
Base64 Encoder / Decoder
Encode strings and files to Base64 or decode Base64 back to plain UTF-8 text.
UUID Generator
Generate bulk v4 UUIDs (Universally Unique Identifiers) instantly.
Timestamp Converter
Convert Unix epoch timestamps (seconds/ms) to ISO dates and human time.