The Complete In-browser Developer Suite to boost everyday productivity

DevvTools is a comprehensive suite of everyday utilities designed specifically for developers, engineers, and power users.

I built DevvTools with one core philosophy: Privacy first and Zero Server Processing. As a developer, we often work with sensitive API keys, confidential JSON payloads, internal JWTs, and proprietary data. With DevvTools, everything happens locally in your browser. Your data is never seen, stored, and it is never transmitted to any external servers.

Our Tools

JSON Formatter

Format, validate, and beautify your JSON data instantly.

JWT Debugger

Decode and inspect JSON Web Tokens locally in your browser.

Base64 Encoder

Securely encode and decode text to Base64 format.

URL Encoder

Safely encode or decode URLs and URI components.

YAML Converter

Convert YAML to JSON or JSON to YAML securely.

Regex Tester

Test and debug regular expressions in real-time.

Timezone Converter

Easily convert times across multiple timezones.

UUID Generator

Generate universally unique identifiers instantly.

Hash Generator

Compute MD5, SHA-1, SHA-256, and SHA-512 hashes.

Cron Descriptor

Translate complex cron schedules into human-readable text.

Whiteboard

Sketch ideas on a privacy-first whiteboard.