About SafeFileConvert

Why the site exists

Almost every "free online converter" works the same way: you hand your file to a server you have never heard of, it does something to it, and you download the result. That is fine for a holiday photo. It is a genuinely bad idea for a bank statement, a passport scan, a signed contract, a medical form, or an unpublished manuscript — and those are exactly the files people convert most often, usually because a government portal or an HR system demanded a different format or a smaller size.

Browsers have been able to do this work themselves for years. Canvas, WebCodecs, WebAssembly and Web Workers can decode an image, rebuild a PDF, or re-encode audio without a single byte leaving the machine. SafeFileConvert exists to make that the default rather than the exception: every tool on the site is written to run on your device, and the site is deployed as plain static files with no backend to upload anything to.

Who runs it

SafeFileConvert is an independent project, not a venture-funded platform, and it is maintained by a small team of web developers who build browser tooling for a living. There is no sales department and no account system — you can use every tool on the site without telling us who you are, and we would rather keep it that way.

If you need to reach a human — a broken conversion, a wrong result, a takedown, a privacy question, or a partnership — the contact page lists the address and roughly how long a reply takes.

How it is built

The site is a static export: HTML, CSS, JavaScript and a handful of WebAssembly modules, served from a CDN. There is no application server, no database, and no upload endpoint — not as a policy, but as an architecture. Image work runs on canvas and OffscreenCanvas, PDFs are parsed and rebuilt with pdf.js and pdf-lib, spreadsheets go through SheetJS, text recognition uses a self-hosted Tesseract build, and audio and video use your browser’s own WebCodecs implementation.

Heavy jobs run in Web Workers so the interface stays responsive, and the engines that need extra data — the OCR language packs, the AVIF encoder — are hosted here rather than pulled from a third-party CDN, so using a tool does not announce to anyone else that you used it.

How to verify the no-upload promise

Do not take our word for it. Open any tool, press F12 to open your browser’s developer tools, switch to the Network tab, and run a conversion: you will see requests for the page and its code, and none carrying your file. For a stronger test, load a tool page, switch your device to airplane mode, and convert a file anyway — it still works, because nothing about the conversion needs the network. Our how it works page walks through both checks step by step.

How it is funded

The tools are free with no daily caps, no watermarks, no queues, and no paid tier that unlocks the good version. The plan is to cover hosting with clearly labelled advertising placed away from the tools themselves; those slots are currently switched off. Advertising is served in the page like any other web page content — it has no access to your files, which never leave the browser tab’s own memory. If that ever changes, the privacy policy is updated to say so.