About UnderByte

UnderByte is a small tool built to solve one problem: hitting exact file-size limits on online forms, job portals, and email attachments without uploading private documents to a random website.

The alternatives usually miss the size, add ads and upsells, or force an upload to servers you cannot audit. UnderByte keeps the job small: choose a target, compress locally, download the file, move on.

Built by Prior Labs LLC in Virginia. Reach out: hello@underbyte.app.