Every time I needed to "compress an image online" or "merge a PDF", I ended up on some site that makes you upload your file to their server.
For a random meme, fine.
For a contract, an ID scan, or anything private?
No thanks.
So I built QuickKit — a growing kit of 38 free tools that run 100% in your browser.
Your files and text never leave your device.
No signup, no watermarks, no tracking of what you process.
How it works (the fun part) The whole thing is a static site — no backend, no database, no server cost.
Everything happens client-side with browser APIs: Image compressor / resizer → the Canvas API () Image → PDF / Merge PDF → jsPDF and pdf-lib, entirely in-page Password / UUID generators → the Web Crypto API () for real cryptographic randomness QR codes → generated locally, no redirect or tracking baked in Hash generator (SHA-256/1/512) → the SubtleCrypto API Countdown timer & "days since" counters → shareable via the URL itself (state encoded in query params), so there's still no backend Because nothing is uploaded, the tools are faster and more private than upload-based services — and they even work offline once loaded (it's an installable PWA).
A few of the tools Files & docs: image compressor, image resizer, image→PDF, merge PDF.
Dev utilities: JSON formatter, Base64, hash generator, UUID, timestamp converter, case converter.
Everyday: QR generator, word counter, unit/percentage/age calculators, world clock, "your life in weeks".
The privacy architecture, in one line If the browser can do it, there's no reason to send the user's data to a server.
That principle killed all the usual costs (no servers, no storage, no compliance headaches) and made privacy the default instead of a feature.
Would love feedback — especially on tools you wish existed.
What "online X converter" do you use that you wish ran locally? 👉 quickkit.space