Tools.

Small tools for everyday work. They run in your browser, so tokens, IBANs and passwords you paste here never leave your machine.

Password generator
Random passwords and passphrases with adjustable rules.
One-time secret sharing
Send a password through a link that works once, encrypted in your browser.
Hash generator
SHA-1, SHA-256, SHA-384 and SHA-512 for text and files.
JWT decoder
Read a token's header, claims and expiry without sending it anywhere.
Base64 encode / decode
Text and files to Base64 and back, including URL-safe Base64.
URL encode / decode
Percent-encoding and a breakdown of a URL's parts and query parameters.
JSON formatter
Format, minify and validate JSON, with the position of any error.
UUID / GUID generator
Version 4 and time-ordered version 7 UUIDs in several formats.
Unix timestamp converter
Epoch seconds and milliseconds to dates and back, local and UTC.
IPv4 subnet calculator
Network ranges for a CIDR block, split into equal subnets or by host count.
IBAN validator
Checks length and check digits and shows the bank code.
Unit converter
Length, mass, temperature, volume, data sizes and more.