Developer Tools

Formatters, validators, encoders, and converters for everyday development.

JSON Formatter

Format, beautify, and validate JSON online. Free, fast, runs entirely in your browser.

JSON Validator

Validate JSON syntax online with clear error messages and line numbers. Free and private.

Base64 Encoder

Encode and decode Base64 strings online. UTF-8 safe, browser-only — your data never leaves your device.

JWT Decoder

Decode JWT tokens and inspect header, payload, and signature. Runs locally — your tokens stay private.

SQL Formatter

Format SQL queries with consistent indentation and keyword casing. Supports MySQL, PostgreSQL, and standard SQL.

Regex Tester

Test regular expressions against sample text. Highlight matches, inspect groups, and toggle flags.

UUID Generator

Generate cryptographically random UUID v4 identifiers — single or bulk, instantly.

Timestamp Converter

Convert between Unix timestamps and human-readable dates. Supports seconds, milliseconds, and ISO 8601.

UUID v7 Generator

Generate time-ordered UUID v7 identifiers and decode their embedded timestamp. Free, fast, runs entirely in your browser.

ULID Generator

Generate ULIDs — compact, URL-safe, lexicographically sortable IDs — and decode their timestamp. Runs entirely in your browser.

Nano ID Generator

Generate compact, URL-safe Nano IDs with a custom length. Cryptographically secure, runs entirely in your browser.

.env ↔ JSON

Convert .env files to JSON and JSON back to .env. Handles quotes, comments, and the export prefix. Runs entirely in your browser.

JSON to Zod

Convert JSON to a Zod schema instantly. Infers email, UUID, URL, and datetime formats, merges array shapes with .optional(), and outputs Zod v4 or v3 code. Free, browser-only.