AltFile started from a simple frustration: most online file converters make you upload your files to a stranger's server, wait in a queue, and hope your document doesn't end up somewhere it shouldn't. We built this the other way around.
Every tool on this site image conversion, PDF editing, spreadsheet and data conversion runs entirely inside your own browser. Your files are processed on your device and never touch our servers. We simply can't see what you convert, because we never receive it.
Image conversion and editing, PDF merging and editing, spreadsheet and data-format conversion, and a handful of everyday utilities (QR codes, hashing, password generation, and more) all free, with no account required.
This site is supported by advertising rather than subscriptions or paywalls. That's the trade-off that lets everyone use the tools without signing up or paying.
Questions, bug reports, or partnership inquiries see the Contact page.