Compress a PDF for uni-assist
uni-assist takes PDFs up to 10 MB. PDF Desk shrinks yours to just under it, right in this tab.
Max 10 MBPDF
Files stay on this device. Nothing is uploaded.
uni-assist upload limits
| Document | Max size | Min size | Formats |
|---|---|---|---|
| My assist document upload (per file) PDF only; scans must be complete and legible; uploaded files cannot be deleted, only replaced by a newer version. | 10 MB | — |
Where this number comes from
“Each file can be a maximum of 10 MB in size.”
— General information – FAQs apply online | uni-assist. Checked October 2026.
PDF Desk aims at 9.7 MB, a little under the limit, because some portals count 1 KB as 1,000 bytes.
If the file will not get small enough
Scan in black and white at 150 DPI instead of colour. Remove blank and duplicate pages with Delete pages. If the portal allows several files, cut the PDF with Split PDF and upload the parts.
Limits of other portals
Questions
What is the maximum PDF size for uni-assist?
My assist document upload (per file): 10 MB. Source: uni-assist.de, checked October 2026.
uni-assist still rejects my PDF. Why?
Check that it is not password-protected, that the file name has no special characters, and that it is a few percent under the limit — some portals count 1 KB as 1,000 bytes.
Are my PDFs uploaded?
No. PDF Desk opens and writes the file with JavaScript inside your browser tab. Nothing is sent to a server, so it is safe for contracts, IDs and bank statements.