DevKit is a free suite of browser-based developer tools designed to make everyday development tasks faster and more convenient. Every tool runs entirely in your browser — no code, tokens, or sensitive data is ever sent to any server. Your work stays completely private.

What DevKit Does

Developers constantly need to format messy JSON, decode a JWT, encode a URL parameter, generate a UUID, test a regex, or convert between data formats. These tasks are simple but tedious when you have to context-switch to the right tool. DevKit puts all of them in one place with a consistent, fast interface so you can stay focused on what you're building.

Who It's For

DevKit is built for software engineers, web developers, backend engineers, data engineers, and anyone who works with code. Whether you're debugging an API response, cleaning up a SQL query for a PR, checking a JWT's claims, or generating a test UUID — DevKit has the right tool ready without requiring sign-up or installation.

Our Tools

Format: JSON formatter/beautifier, HTML formatter, CSS formatter, SQL formatter, XML formatter — paste messy code and get properly indented, readable output instantly
Encode/Decode: Base64 encoder/decoder, URL encoder/decoder, HTML entity encoder, Unicode converter, JWT decoder (with claims inspection)
Generate: UUID/GUID generator (v4), regex tester with match highlighting, color code converter, Unix timestamp converter, cron expression builder
Hash & Data: Hash generator (MD5, SHA-1, SHA-256, SHA-512), diff checker (text comparison), JSON-to-CSV converter, CSV-to-JSON converter, Markdown preview

How Our Tools Work

Every DevKit tool processes data locally in your browser using JavaScript. When you paste code or text into any tool, the transformation happens on your device — nothing is transmitted over the network. This is especially important for tools like the JWT decoder and hash generator, where the input may contain sensitive credentials or proprietary code. DevKit is safe to use in corporate environments where data privacy is a requirement.

Accuracy & Standards

Formatters follow widely accepted style conventions for each language (2-space or 4-space indentation, consistent quoting). The JWT decoder parses standard JWT structure (header, payload, signature) and displays decoded claims without verifying the signature. Hash functions use the Web Crypto API for standards-compliant output. UUID generation uses cryptographically random values per RFC 4122.

Free to Use

All DevKit tools are completely free with no registration, no limits, and no watermarks. Questions or suggestions? Visit our contact page.

About DevKit