What to Check in a PDF Before You Send or Upload It
Updated 16 October 2026 · 5 min read
Page count, file size, encryption and hidden details like the author's name: a two-minute check that prevents rejected uploads and awkward surprises.
Most problems with PDFs are discovered too late: a portal rejects the upload, a page turns out to be missing, or the recipient notices the file is titled after an old template. A quick check before sending catches all of these.
1. The basics: pages, size and protection
Add the file to the PDF Information Checker. It shows four things in a second or two:
- Page count. Did the scan capture every page? Does it match the original?
- File size. Is it under the upload or email limit? If not, see why a PDF is large or go straight to Compress PDF.
- PDF version. Almost every reader opens all common versions; it matters only for very old software or strict archive rules.
- Encrypted. A protected PDF may be refused by upload portals and cannot be changed by many tools.
If a file is encrypted but opens without a password, it has editing restrictions. If it asks for a password, it is locked. Either way, ask whoever created it for an unrestricted copy.
2. Hidden details: the metadata
Besides its pages, a PDF stores a title, author, subject, keywords, the program that created it and the dates it was made and changed. The PDF Metadata Viewer shows them all.
| Field | What to look for |
|---|---|
| Title | A leftover template name, such as “Quote_template_v3” |
| Author | Your full name, a username or a colleague's name |
| Creator / Producer | Which program made it, useful when formatting looks wrong |
| Created / Modified | Which of two similar files is newer |
“Not set” just means a field is empty, which is common and fine. The viewer is read-only. To get a copy without the original metadata, you can rebuild the file, for example with Compress PDF, which creates a fresh document.
3. If it is too large, find out why
The PDF Size Analyzer lists the images and fonts inside the file. Large photos are usually the cause, and they compress well.
A two-minute checklist
- Page count matches the original.
- Size is under the limit, with a little room to spare.
- Not encrypted, if the portal needs to read it.
- Title and author are what you are happy to share.
- The file name says what it is.
All three tools read the file in your browser, so even confidential documents are never uploaded.