Sejda alternative that never uploads your file
Sejda 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 Sejda'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 Sejda safe?
Short answer: yes, for most documents. Sejda is a real company with a published privacy policy and a large user base. Sejda processes documents on its servers and deletes them after a few hours, with published limits on free usage.
A few hours of retention is short — but for those hours a copy of your document exists on infrastructure you do not control. Whether that matters depends entirely on the file: for most it does not, for a contract under NDA it may be the whole decision.
The actual difference
| Feature | Sejda | 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 the document is sensitive and you want no upload, no account, and no per-day or per-hour limits — the tools run on your device for as long as you need them, and the Workspace records every step. Sejda fits when you want its hosted service and its desktop version, within its free-tier limits.
Verify it in one minute
Settle it with a measurement, not a comparison page: open DevTools → Network, run a harmless file through both tools, and watch the requests. The Privacy Lab explains each thing you will see.
Try it on a copy first
Use a file you do not care about, watch the Network tab, then decide.