Utils

Trim a browser cookie export down to domain, name, value and path, as a single-line JSON array.

Validate, pretty-print or minify JSON, with the exact position of the first syntax error.

Convert text to and from Base64, with UTF-8 support and a URL-safe alphabet option.

Decode the header and payload of a JSON Web Token and read its timestamps in plain English.

SHA-1, SHA-256, SHA-384 and SHA-512 digests of any text, computed with the Web Crypto API.

Generate cryptographically random UUID v4s in bulk, plus NIL and short random IDs.

Build strong random passwords or passphrases and see how much entropy they actually carry.

Percent-encode or decode strings, and break any URL apart into its parts and query params.

Convert Unix epochs to and from dates in your local zone and UTC, with a live clock.

Change case, slugify, trim, sort, dedupe and reverse lines — with live word and byte counts.

Compare two blocks of text line by line and see exactly what was added and removed.

Test a regular expression against sample text, with highlighted matches and capture groups.

Convert between HEX, RGB and HSL, preview the color and check contrast against black and white.

Generate placeholder paragraphs, sentences or words — as plain text or HTML.