Tools, agents, and playful machines.

In-browser apps

Local AI ↗

a small language model you can chat with

shader playground ↗

hand-written GLSL, compiled live

graphing calculator ↗

plot functions — pan, zoom, share

synth ↗

a playable polyphonic synthesizer

beats ↗

a 16-step drum machine

• base64 encoder / decoder

  Unicode-safe Base64 encode and decode, with URL-safe variant.

• url encoder / decoder

  Percent-encode and decode URLs and query components.

• jwt encoder / decoder

  Decode a JWT's header, payload and time claims — or encode and HMAC-sign a new token.

• hash digest

  SHA-1 / SHA-256 / SHA-384 / SHA-512 of text or files, via WebCrypto.

• number base converter

  Binary, octal, decimal, hex — arbitrary precision via BigInt.

• unix timestamp converter

  Epoch seconds/millis ⇄ human dates, timezone-aware, with relative time.

• cron explainer

  Cron expression → plain-English schedule + the next run times.

• uuid generator

  UUID v4 and v7, single or bulk, copy-ready.

• json formatter & validator

  Pretty-print, minify, validate — with precise error positions.

• case converter

  camelCase, snake_case, kebab-case, Title Case, CONSTANT_CASE and more.

• text diff

  Line and word diff of two texts, computed locally.

• regex tester

  Live match highlighting, capture groups, and a common-pattern library.

• markdown editor

  Split-pane markdown editor — live preview, right-to-left aware, copy as HTML, Markdown, or rich text.

• word & character counter

  Words, characters, lines, reading time, and word frequency.