Unicode-safe Base64 encode and decode, with URL-safe variant.
Tools
Small developer utilities — converters, encoders, formatters, an editor, and a graphing calculator. Drive any of them from the URL or an agent: see for agents.
encode & decode
Percent-encode and decode URLs and query components.
Decode a JWT's header, payload and time claims — or encode and HMAC-sign a new token. All in the browser.
SHA-1 / SHA-256 / SHA-384 / SHA-512 of text or files, via WebCrypto.
converters
Binary, octal, decimal, hex — arbitrary precision via BigInt.
text & data
Pretty-print, minify, validate — with precise error positions.
camelCase, snake_case, kebab-case, Title Case, CONSTANT_CASE and more.
Line and word diff of two texts, computed locally.
Live match highlighting, capture groups, and a common-pattern library.
Split-pane markdown editor — live preview, right-to-left aware, copy as HTML, Markdown, or rich text.
Words, characters, lines, reading time, and word frequency.
time
Epoch seconds/millis ⇄ human dates, timezone-aware, with relative time.
Cron expression → plain-English schedule + the next run times.
generators
UUID v4 and v7, single or bulk, copy-ready.
math
Plot functions on an interactive canvas — pan, zoom, multiple expressions, shareable links.