Developer tools. Simply.

Fast, local-first browser utilities for JSON, APIs, text, and encoding—processed entirely on your device.

JSON

JSON Formatter JSON Validator JSON Diff JSON Minifier

Data Converters

JSON to TypeScript / Zod JSON ↔ YAML / TOML Converter CSV ↔ JSON Converter

API

JWT Decoder HTTP Status Code Lookup API Response Viewer URL Parser

Security & Cryptography

Key Pair Generator SSL/TLS Certificate & CSR Decoder

Web & Network

cURL to Code Converter Cron Expression Parser User-Agent Parser Chmod Calculator

Text

Text Diff Case Converter Line Sorter Duplicate Line Remover Word and Character Counter

Encoders

Base64 Encoder / Decoder URL Encoder / Decoder HTML Entity Encoder / Decoder

Developer Utilities

UUID / NanoID / CUID Generator Unix Timestamp Converter Regex Tester HMAC & Hash Generator SQL Formatter

Mocking & Generators

Mock Data Generator QR Code Generator & Reader