Kunji.dev

Essential Developer Tools
Fast. Secure. Privacy-First.

Access essential developer utilities—from JSON formatting to Base64 encoding—all running locally in your browser. No servers, no tracking, no registration.

Popular Tools

Discover a curated selection of our most used developer utilities, all running locally for maximum privacy and speed.

JSON Formatter

Validate, beautify, and minify JSON instantly.

JSON to TS

Convert JSON to TypeScript interfaces & types.

Base64 Converter

Encode and decode strings or images to Base64.

Diff Checker

Compare text or code snippets side-by-side.

JWT Debugger

Decode, verify and generate JWT tokens.

URL Encoder

Encode special characters in URLs safely.

UUID Generator

Generate random v1-v5 UUIDs in bulk.

Password Generator

Create strong, random passwords.

HTML Minifier

Minify HTML code to reduce file size.

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Essential Developer Tools Fast. Secure. Privacy-First.