67 tools · nothing leaves your browser
Tools that never see your data.
JSON, images, encoding and more. Everything runs inside this tab — no upload, no account, no server to trust.
Results appear here.
Open DevTools. Watch the Network tab. Use any tool.Zero requests.
- No upload
- No account
- No server
- Works offline
What do you do?
Popular
All 67 tools →- ImageImage CompressorCompress and convert images to WebP, JPEG or PNG. Files never leave your browser.
- JSONJSON FormatterFormat, validate and repair JSON — it tells you what is wrong, then fixes it and says what it changed.
- GeneratorsQR Code GeneratorTurn any text, URL or Wi-Fi credential into a QR code. Nothing is uploaded.
By category
Web
- cURL to Code Converter
- Ethereum CREATE2 Deterministic Address Calculator
- EVM Bytecode Disassembler & Opcode Reference
- IPv4 Subnet & CIDR Calculator
- MAC Address Lookup & Formatter
- Merkle Tree & Proof Generator for Airdrops and Whitelists
- Ethereum RLP (Recursive Length Prefix) Encoder & Decoder
- Solidity 4-Byte Function Selector Lookup & Keccak-256 Calculator
- Solana Address & PDA Inspector
- Solidity ABI & Signature Inspector
- Solidity Calldata & EVM Raw Word Dissector
- URL Parser & Query Inspector