Why government uploads fail
The most common reasons are file-size limits, scanned pages that are too heavy, combined packets with too many pages, and uploads that contain unnecessary attachments.
Best order to prepare the file
- 1. Keep only the required pages.
- 2. Split large packets if the portal accepts separate uploads.
- 3. Compress the final PDF.
- 4. Confirm the file opens and looks readable.
- 5. Upload the smaller version.
What usually compresses well
Scanned ID copies
Image-heavy identity pages often take more space than expected.
Printed forms re-scanned
Signed forms that were printed and scanned back into PDF often compress well.
Common mistakes
- • Uploading extra supporting pages not requested by the form.
- • Combining many documents into one large packet when separate uploads are allowed.
- • Not checking whether the smaller PDF is still readable.
- • Waiting until the final submission step to fix file-size issues.
Find the real limit first
Government portals show their size limits next to each upload field or in the user manual, and different documents on the same form can have different limits. Note the limit for each field before you start, so you compress each file just enough instead of guessing.
Several country guides on this site have a Portal file size limits table with figures checked against the official pages, such as the Income Tax, GST, IRCC and CRA portals.
Keep official documents readable
An official reviewing your submission must be able to read names, dates, seals and signatures. Use the Balanced compression level first and zoom in on the small print. Use Strong only if the file still does not fit, and rescan rather than over-compress if the result becomes hard to read.
Keep your originals
Save the compressed copies under new names and keep the original scans. Portals sometimes ask for a clearer copy later, and you may need the full-quality version for an in-person appointment.
FAQ
Can I compress official supporting documents?
Yes, as long as the document stays readable and the portal accepts the file.
What if the file is still too large?
Split the packet into smaller PDFs if the system allows it, then upload the needed sections.