About File Cabin

File Cabin is a small collection of file tools built on one rule: if a browser can do it, the file should never leave your computer.

Why build another converter site?

Converting a file is not difficult — modern browsers ship the image, canvas, worker and document APIs that make almost all of it possible on your own machine. Yet most online tools still upload your file to a server, process it there and send it back. That upload adds latency, costs the operator money per file, and quietly places a copy of your document on hardware you do not control.

Doing the work in the browser removes all three problems at once: it is faster, it carries no per-file cost (which is why the tools can stay free and unlimited), and there is simply no copy of your file to lose.

How the tools are built

• Client-side only. Everything runs on your device; there is no upload endpoint.
• Heavy work off the main thread. Compression and encoding run in a Web Worker, so the page stays responsive and a job can be cancelled.
• Exact targets, not guessed sliders. Where a size limit exists, you set the limit and the tool searches for the best quality that fits it.
• Light pages. No web fonts, no tracking scripts, no third-party widgets loading in the background.

What we will not do

• We will not watermark your result or hold it hostage behind an account.
• We will not add a tool that quietly requires a server round-trip without saying so on the page.
• We will not build anything designed to strip watermarks, bypass DRM, or redistribute copyrighted work.

Feedback

If a tool gets something wrong — a format it cannot read, a size it cannot reach, a browser where it breaks — that is worth knowing about. Write tosupport@filecabin.app.