About

a → b is a free file converter that does one thing: convert files from format a to format b, in your browser, without ever sending your data anywhere.

How is this free?

It costs us almost nothing to run. The site is static HTML and JavaScript hosted on Cloudflare's free tier. Conversion happens on your device, so we don't pay for servers to process your files. We don't sell your data. We don't show ads. If you'd like to support the project, you can buy me a coffee. Optional, never asked twice.

Why does this exist?

Most online file converters upload your files to their servers. Even when they say they don't keep them, you have to take their word for it. We wanted a tool we could trust with personal documents — contracts, tax forms, scanned IDs — without that leap of faith.

Open source

The code is on GitHub. Anyone can audit it.