Soda PDF alternative that never uploads your file
Soda PDF is a legitimate service, and the practical difference is architectural: it processes your file on its servers, while UnboundPDF does the work inside your browser so the document is never transmitted. If your file is confidential, that difference matters. You can verify both claims yourself in about a minute.
Updated July 2026. We do not allege anything about Soda PDF's data handling — only the documented difference in where the work happens.
UnboundPDF is a free suite of 53 PDF and image tools that run entirely in your browser — merge, split, compress, edit text, OCR in 126 languages, redact, sign, convert and archive to PDF/A. Your document is read and written by the page on your own device; there is no document-upload endpoint in the core tools, no account, no watermark and no daily cap. Every result can be checked — with the Network tab, or with the Document Passport the Workspace writes for a chain of steps.
Is Soda PDF safe?
Short answer: yes, for most documents. Soda PDF is a real company with a published privacy policy and a large user base. Soda PDF's online service uploads documents to its servers, with desktop products sold separately.
The split in Soda PDF's own product line — paid desktop for local work, free web with uploads — prices the difference. A browser-local tool collapses it: the work stays on your machine and there is nothing to buy.
The actual difference
| Feature | Soda PDF | UnboundPDF |
|---|---|---|
| Where the work happens | Their servers | Your browser |
| Is the file transmitted? | Yes, then deleted per their policy | No |
| Works with no internet after load | No | Yes |
| Account required | For some features | Never |
| You can verify the claim | Policy document | DevTools, in a minute |
Where each one fits
UnboundPDF is the right choice when you want the whole job done in a browser tab on your own device, free, with no trial and no account, and the option of chaining steps with a Document Passport. Soda PDF fits when you want its desktop application and its e-signature service.
Verify it in one minute
Ignore both marketing pages and check: DevTools → Network, one harmless file, both tools. Where the bytes go is not a matter of opinion. The Privacy Lab walks you through it.
Try it on a copy first
Use a file you do not care about, watch the Network tab, then decide.