All tools

• formatter

  JSON Formatter & Validator

  Paste JSON to validate it and instantly reformat or minify it.

• formatter

  SQL Query Formatter & Explainer

  Format complex SQL queries across dialects, and paste MySQL, SQLite, or PostgreSQL EXPLAIN output to highlight performance bottlenecks.

• converter

  Base64 Encoder / Decoder

  Encode text or files to Base64, or decode Base64 back to text or a downloadable file — instantly, entirely in your browser.

• converter

  Timestamp / Unix Time Converter

  Convert Unix timestamps to readable dates and back, in one input.

• converter

  JSON to TypeScript Converter

  Paste JSON and instantly generate TypeScript interfaces or types.

• converter

  Cron Expression Generator

  Build a cron expression visually, or paste one in to see what it means in plain English.

• converter

  Prisma Schema ↔ SQL DDL Converter

  Convert between Prisma schema and MySQL/PostgreSQL DDL, including relations, enums, and indexes.

• generator

  UUID Generator

  Generate RFC 9562-compliant UUID v4 (random) or v7 (time-ordered) values in bulk, entirely in your browser.

• generator

  Hash Generator

  Generate MD5, SHA-1, SHA-256, and SHA-512 hashes or HMACs from text or files, entirely in your browser.

• decoder

  JWT Decoder

  Paste a JWT to instantly decode its header and payload — no signature verification, fully client-side.

• web3

  ABI Decoder & Encoder

  Decode calldata and event logs, or encode function calls, using any contract ABI.

• web3

  Ethereum / EVM Unit Converter

  Convert between Wei, Gwei, and Ether, and estimate gas fees for legacy or EIP-1559 transactions.

• web3

  Smart Account (ERC-4337) UserOp Builder

  Build an ERC-4337 UserOperation for EntryPoint v0.6 or v0.7 and see its JSON, packed encoding, and UserOpHash.