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Developer Tools

An essential toolkit for developers: JSON validation, JWT decoding, Base64 encoding, and Regex testing.

Built by engineers, for engineers. Fast, local, and secure.

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Workspace • Developer Tools

An essential toolkit for developers: JSON validation, JWT decoding, Base64 encoding, and Regex testing.

Built by engineers, for engineers. Fast, local, and secure.

JSON Formatter / Validator

Format, validate, and beautify messy JSON strings with robust error reporting.

Zero-storage readyOpen Tool

JWT Decoder

Decode and inspect JSON Web Tokens safely without sending payloads to any server.

Zero-storage readyOpen Tool

Base64 Encoder / Decoder

Convert plain text or files to Base64 strings, and vice versa.

Zero-storage readyOpen Tool

Interactive Regex Tester

Test regular expressions against your text interactively with match highlighting.

Zero-storage readyOpen Tool

Color Converter (HEX/RGB/HSL)

Convert colors between HEX, RGB, HSL, and CMYK with a live preview.

Zero-storage readyOpen Tool

UUID Generator

Rapidly generate batches of v4 UUIDs for secure API and database use.

Zero-storage readyOpen Tool

URL Encoder / Decoder

Safely encode URLs for web requests, or decode them back to readable formats.

Zero-storage readyOpen Tool

Cron Expression Explainer

Translate complicated cron schedules into human-readable text.

Zero-storage readyOpen Tool

CSS Minifier / Beautifier

Compress CSS for production speed, or expand minified code for reading.

Zero-storage readyOpen Tool

The Developer Tools suite is a centralized hub for the daily technical tasks that demand speed and accuracy. Pasting a JWT token, an API response, or a regex pattern that includes real data into a random website means that data left your machine first — this toolkit runs 100% client-side, so your debug data, secrets, and code snippets stay exactly where they belong: on your machine.

The Engineer's Daily Toolkit

Inspect JWT tokens and other encoded strings without ever revealing your payload or secrets to a third-party server. Format, minify, and validate complex JSON structures instantly — our local parser handles massive files that would crash standard online editors.

Build and test complex regular expressions and cron schedules with real-time visual feedback and explanatory guides. Seamlessly move between Base64, URL-encoding, and various color formats (HEX, RGB, HSL) with one-click copy and zero network latency.