QuietFiles is a set of free converters — HEIC to JPG, PDF to JPG — that run entirely in your browser. Nothing is uploaded, nothing is stored, nobody sees your files but you. Built and run by Software First.
Each tool works right on the page — drop zone above the fold, multi-file batches, and results that download straight out of your browser.
iPhone photos come out of the camera as HEIC — efficient for storage, awkward everywhere else. QuietFiles decodes them with libheif compiled to WebAssembly and hands back universal JPGs, without your photos ever leaving the room.
Renders every page of a PDF into a crisp JPG image using Mozilla's pdf.js — parsed and rasterised locally, page by page. Contracts, statements and IDs are exactly the files you shouldn't be uploading to a stranger's server.
Most "free online converters" are an upload form in disguise: your file goes to their server and you trust them to delete it. QuietFiles inverts the architecture — the converter comes to you.
● your file, in motion — always inside the dashed line · ✕ the network path QuietFiles never takes
We can't lose, sell or leak files we never receive. That's a stronger guarantee than any privacy policy — and you can verify it yourself in your browser's network tab.
Conversion happens in the page. Open the network tab and watch: after load, nothing leaves your machine.
No sign-up, no login, no email capture, no "free tier" to outgrow. Open, convert, close.
No cookie banner because there are no cookies — and no cross-site trackers or ad networks either.
Once the page has loaded you can go airplane-mode — conversion is local, so it keeps working.
Static pages from Cloudflare's edge, zero JavaScript until you pick a file, WASM loaded lazily.
Your device does the compute and a CDN serves the files — near-zero running cost means it stays free.
The same standard we hold for client work: strict TypeScript, a hard performance budget, and the lightest tool that does the job.
Astro ships plain HTML and CSS; JavaScript hydrates only the converter island, only when you use it.
Decoding runs in Web Workers off the main thread, so the page stays responsive through big batches.
Lighthouse 95+ on mobile is a hard requirement, not polish — performance is how a tool site earns its ranking.
Try it — no sign-up, and your files won't go anywhere. That's the point. And if you want software built like this for your business, talk to us.