Pre-submit file checklist for online forms.

Most upload failures are avoidable. Before submitting a file, check format, size, dimensions, readability, page order, and whether the file contains exactly what the receiving website asked for.

Check the rule before editing

Read the upload instruction carefully. Look for accepted file types, maximum file size, required width and height, page count, background color, and whether the file may be password protected.

Do not start by compressing. Start by understanding the requirement. The correct edit for a 300x300 photo is different from the correct edit for a 100 KB PDF.

Check the final file, not only the tool setting

After processing, inspect the downloaded file itself. Confirm the final size, extension, dimensions, and page count. Some systems show size in KB differently, so staying comfortably below the limit is safer than landing exactly on the maximum.

Open the file outside the tool when the document is important. A normal PDF viewer or image viewer gives a better sense of what the receiver will see.

Check visible quality

For PDFs, zoom into names, dates, stamps, signatures, seals, QR codes, and barcodes. For photos, check face clarity, background, crop, and color. For signatures, check dark ink, complete strokes, and clean margins.

If the output is unreadable, do not submit it just because the file size is correct. Use a better source image, less aggressive compression, or fewer pages.

Keep originals until accepted

Do not delete the original PDF, photo, or signature until the upload succeeds. If the website rejects the processed file, the original lets you retry without stacking compression damage.

Save final files with clear names. A filename such as certificate-compressed.pdf or signature-140x60.jpg helps you avoid uploading the wrong version.

Common questions

Should I aim for the exact maximum size?

No. Stay under the maximum with some margin if possible. A file slightly below the limit is safer across different upload systems.

Why does a file pass one portal and fail another?

Different portals enforce different file type, size, dimension, and password rules.

What should I keep after submitting?

Keep the original and accepted final file until the application, form, or transaction is complete.

Continue with the right tool

After checking the rule, choose the tool that changes only what needs to change. That keeps the final file easier to inspect and reduces the chance of creating a smaller file that the receiving website still rejects.