Large scans
Budgets, certificates, and project documents were combined into a large PDF.
Grant application upload guide
Compress Grant Application Documents for Upload
Grant portals can ask for proposals, budgets, organization certificates, tax records, financial statements, project documents, and signed forms. Upload limits can reject large supporting PDFs.
Last verified: July 18, 2026. Grant upload limits vary by funder, government program, nonprofit portal, country, and document category. Use the current file-size and format prompt in the grant workflow.
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 cap
The grant portal has a smaller upload cap for each attachment field.
Portal mismatch
The file includes high-resolution images, blank pages, or duplicate pages.
Manual fix, then permanent fix
Compress each attachment, remove blank pages, and keep organization names, budget numbers, signatures, and certificate details readable.
Auto Compress helps prepare smaller grant application files in Chrome before the destination portal receives them.
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 guides
More file upload fixes
One extension for recurring upload limits