Large source file
Each scanned page is stored as a high-resolution image.
Scanned document upload guide
Compress Scanned PDF for Upload
Scanned PDFs are often much larger than normal PDFs because every page is an image. That is why passports, certificates, bank statements, and form scans often fail upload limits.
Last verified: July 18, 2026. Scanned PDF upload limits vary by website, document type, and workflow. Use the live upload prompt as the final target.
Install onceBrowser workflowNo server storage
Why the upload failed
Upload errors usually come from files that are just over the limit, exported in the wrong format, or created from high-resolution scans and phone photos.
Upload target
Phone scans often include margins, shadows, or duplicate pages.
Portal mismatch
The portal expects a smaller PDF than the scanner produced.
Manual fix, then permanent fix
Crop margins, remove blank pages, reduce scan resolution carefully, and keep all text, stamps, signatures, and document numbers readable.
Auto Compress helps prepare smaller scanned PDFs before upload, without storing files on Auto Compress servers for compression.
Check the prompt
Use the latest file-size and format rule shown by the upload portal.
Prepare a smaller file
Compress carefully so the document remains readable.
Upload normally
The destination website receives the smaller file. Auto Compress does not store it for compression.
Related backlinks
Useful Auto Compress guides
One extension for recurring upload limits