Atölye

A workshop of small, fast developer tools. Free, instant, and fully private — nothing you type ever leaves the page.

Press ⌘K to jump to any tool.

Encoding

Convert text to Base64 and back, UTF-8 safe, with a URL-safe variant. Live, two-way, fully in your browser.

Turn any file or image into a Base64 data URI and back — with a live preview and download. Nothing is uploaded.

Decode a JSON Web Token to read its header, payload, and claims — with an expiry countdown. Nothing is sent anywhere.

Format, minify, and validate JSON with line-accurate error messages and optional key sorting. Runs entirely in your browser.

Parse, build, and understand cron schedules: plain-English explanation, next run times, and a per-field builder.

Convert Unix timestamps to human dates and back, across any IANA timezone — with a live now readout.