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About Parsely

Privacy-first developer utilities that run entirely in your browser.

Why we built this

Developers routinely need to format JSON, decode JWTs, check hashes, and convert data formats — often while working with sensitive production data. Most online tools silently upload everything you paste to their servers. Parsely is different: it is a collection of tools that run 100% in your browser, with zero server involvement.

How the privacy architecture works

Parsely is a statically generated site hosted on Cloudflare Pages. When you visit a tool:

  1. 1.Your browser downloads static JavaScript files (HTML, CSS, JS — no server rendering).
  2. 2.When you paste data, it is processed by JavaScript running inside your browser tab — the same JavaScript engine that runs every website.
  3. 3.No network request is made. No API is called. Your data never leaves your device.
  4. 4.Heavy operations (formatting large JSON, streaming file hashing) run in Web Workers — background threads that keep the UI responsive.

You can verify this yourself: open DevTools → Network tab → paste data into any tool. You will see zero outbound requests to our domain.

Open source libraries used

Parsely uses well-maintained, open-source libraries:yaml,fast-xml-parser,papaparse,svgo,jsonrepair,hash-wasm,culori,cron-parser, and others. These run entirely client-side.