Developer Tools

A set of small utilities I kept opening other sites for. Every one of them runs in your browser: what you paste stays on your machine and is never sent here.

Hashing

Hash Generator MD5, SHA-1, SHA-256, SHA-384, SHA-512 and CRC32 of any text, side by side.HMAC Generator Sign a message with a secret key using SHA-1, SHA-256, SHA-384 or SHA-512.

Encoding

Base64 Encode and Decode Convert text to and from Base64, with a URL-safe variant.URL Encode and Decode Percent-encode text for a query string, or decode it back.Hex Encode and Decode Convert text to and from hexadecimal, with a choice of separator.Binary Encode and Decode Convert text to and from its binary representation.HTML Entity Encode and Decode Escape text for HTML, or turn entities back into characters.

Formats and data

JWT Decoder Read the header and claims of a JSON Web Token. Nothing is sent anywhere.JSON Formatter Pretty-print, minify and validate JSON, with the error position on failure.Number Base Converter Convert between binary, octal, decimal and hex at arbitrary precision.Timestamp Converter Unix epoch to a readable date and back, in UTC and your local time.Colour Converter Convert between HEX, RGB and HSL with a live preview.

Generators

UUID Generator Generate version 4 or time-ordered version 7 UUIDs in bulk.Password Generator Random passwords and passphrases, with the entropy shown for each.

Text

Case Converter camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE and more.Text Statistics Characters, words, lines, and the true UTF-8 byte length.Text Diff Compare two blocks of text and see which lines were added or removed.Regex Tester Test a regular expression against sample text with highlighted matches.