Everyday tasks
How to prepare a PDF for an online form upload
By DeckleUpdated
To prepare a PDF for an online form upload, check the form's rules first, then fix the file to match: remove pages the form does not need and turn sideways pages in Organize PDF pages, choose Save pages, unlock it if it has a password and give it a clear name. Four things commonly get an upload rejected: format, size, password and page count. Your original file stays as it was, so you can start again if the form changes.
How to get a PDF ready for upload with Deckle
- Read the upload rules on the form: accepted formats, maximum file size, maximum pages and any naming rules.
- Open Organize PDF pages and choose your PDF, or drop it onto the page.
- Select each page the form does not need, such as blank backs of scanned sheets, and choose Remove.
- Turn any sideways page with Turn left or Turn right so a reviewer can read it without rotating their screen.
- Choose Save pages. The button stays disabled until you have changed at least one page.
- Download the new PDF, rename it if the form has naming rules, and check its size in your file manager before uploading.
The result screen tells you how many pages the new PDF has, so you can compare it with the form's page limit.
The four reasons uploads fail
| The form says | Usual cause | Fix |
|---|---|---|
| "File type not supported" | The file is a photo, a Word document or a HEIC image | Convert photos with JPG to PDF or HEIC to PDF; export documents as PDF from the app you wrote them in |
| "File too large" | Photos of pages at full camera resolution | Remove pages you don't need, retake photos at a lower resolution, or split the file if the form takes several uploads |
| "File is encrypted" or "cannot be read" | The PDF has an open password | Make an unlocked copy with Unlock PDF using the password you have |
| "Too many pages" or "one file only" | Several documents are needed in one field | Remove extra pages, or combine the files with Merge PDFs |
Keep the file small without compression
Deckle has no target-size compression, so the way to keep a PDF small is to control what goes into it.
- Text documents are already small. A 10-page PDF exported from a word processor is often well under 1 MB. If such a file is large, it usually contains photos.
- Photographed pages are large. JPG to PDF places each photo as it is, so a 4 MB phone photo adds about 4 MB to the PDF. Leave out photos the form doesn't ask for.
- Split when the form allows more than one upload. Split PDF makes several smaller files from page ranges. Upload each part in its own field.
Example: a form allows 5 MB per upload. Your pack is a 3-page form (0.3 MB) and two ID photos (4 MB each). Upload the form and the ID as separate files if there are two fields, or retake the ID photos closer and at a lower resolution so each is around 1 MB.
Name the file properly
Many portals reject names with symbols, or cut long names short. A safe name uses letters, numbers and hyphens only, such as smith-proof-of-address.pdf. Keep the .pdf extension. Rename the downloaded file in your file manager, or set the name in Merge PDFs or the image tools before you create the file.
Check before you press upload
Open the file you are about to upload, not the one you started with. Check that:
- every page is upright and readable at normal zoom
- the page count is within the limit
- it opens without asking for a password
- the name follows any rules on the form
If the form needs a signature, sign the document before you prepare it. Deckle does not add signatures to PDFs.
Tips
- Do the work in the right order. Unlock first, convert images next, fix pages, then merge. A protected file cannot be merged or edited.
- Don't protect upload files. Add a password only when you email a file. Portals generally need to open the PDF themselves.
- Keep a copy of what you uploaded. Save the exact file in a folder with the date, so you can show what you submitted if asked.
- Remove hidden details if needed. The Author field can carry your work account name. Remove PDF metadata removes the document properties that hold it.
Other ways to prepare a PDF
- Print to PDF. On most computers and phones, the print dialog can save a PDF, and some let you choose a page range. That makes a new file with only those pages. See the device guides, such as how to split a PDF on Windows.
- Scan again at a lower resolution. If a scanner app made the file, its settings may offer a smaller size or black-and-white mode. A fresh scan is often the quickest way to get under a size limit.
Frequently asked questions
Why does the form say my PDF is invalid?
Usually the file is password protected, not really a PDF (a photo renamed to .pdf), or over the size limit. Open it on your device to check, and make an unlocked copy if it asks for a password.
How do I make a PDF smaller for an upload?
Remove pages you don't need, leave out large photos and split the file if the form takes several uploads. Deckle cannot compress to a set size.
Can I upload a photo instead of a PDF?
Only if the form accepts images. If it asks for PDF, convert the photo with JPG to PDF.
Does removing pages change the rest of the document?
No. The pages you keep are copied as they are, and the original file stays unchanged.
Related tools
- Organize PDF pages to remove and turn pages
- Split PDF to divide a file for several upload fields
- Unlock PDF to remove a password the form cannot handle
- JPG to PDF to turn photos into an accepted format