About HandyFile

HandyFile is a collection of small, single-purpose tools for working with files and text. Every one of them runs in your browser.

Why it works this way

Most online file tools upload your file to a server, process it there, and send the result back. That design has three costs. You wait for the upload and the download. You have to trust that the operator deletes your file afterwards. And the operator pays for bandwidth and compute on every single use, which they recover by filling the page with advertising.

Doing the work on your own device removes all three at once. There is no upload to wait for, so it is faster — often dramatically so on large files. Your file genuinely never leaves your machine, so the privacy claim is a fact about the architecture rather than a promise in a policy. And because processing costs us nothing, we have no reason to bury the tool in advertising to pay for it.

These are not three separate goals we balance against each other. They are one decision, seen from three sides.

What that means in practice

• No upload, no queue, no waiting on someone else's server.
• No account. Nothing to sign up for.
• Works offline once the page has loaded.
• Your file is never transmitted — enforced by a Content Security Policy, not just stated.

The limits

Being honest about the trade: your device does the work, so very large files can exceed what a browser can hold in memory — phones especially. Where a limit exists, the tool states it on its own page rather than failing mysteriously.

Some formats have no native browser support at all — HEIC, the format iPhones save photos in, is the common example. Where the format matters enough, we ship a decoder compiled to WebAssembly rather than uploading your file to a server that has one installed. Where we have not done that yet, we say so on the tool instead of pretending otherwise.

Contact

Bug reports, requests for a tool, or anything else:support@handyfile.app.