I built EVMTools - a collection of 35 free
online developer tools. Everything runs client-side in your browser.
No data is sent to any server, no signup required.
## Developer Utilities
- JSON Formatter - Format, minify, and validate JSON
- SHA-256 / MD5 Hash Generator - Generate hashes instantly
- JWT Decoder - Decode and inspect JSON Web Tokens
- UUID Generator - Generate v4 UUIDs in bulk
- Regex Tester - Test patterns with real-time highlighting
- URL Encoder/Decoder - Encode and decode URL components
- Base64 Encoder - Encode and decode Base64 strings
- Unix Timestamp Converter - Convert between timestamps and dates
## Ethereum / Crypto Tools
- ABI Encoder/Decoder
- Calldata Decoder
- Keccak256 Hash Generator
- Function Selector Calculator
- Gas Calculator & ETH Unit Converter
- Checksum Address Validator
- Signature Verifier
- CREATE2 Address Calculator
- Merkle Proof Generator
- and more...
## Why I built this
I was tired of googling "json formatter online" or "keccak256 hash" every time I needed a quick conversion. So I built one place with all
the tools I use daily.
All tools are completely free and run locally in your browser. Your
private keys, seed phrases, and sensitive data never leave your
machine.
Check it out: https://evmtools.dev
Feedback welcome - what tools should I add next?
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