Protect PDF for Researchers
The journal portal caps submissions at 20 MB and your figure-rich manuscript is 45. If you work as one of the researchers, you have been there. Confileo's Protect PDF tool locks a PDF with a password so only the right people can open it — free, in your browser, with your files deleted automatically the moment you are done.
Start Using Protect PDF NowWhy Researchers use Protect PDF
Day to day, researchers handle journal papers, datasets, grant proposals, survey results, literature reviews and conference posters — exactly the kind of files this tool is built for.
- Merging dozens of source papers into one annotated literature-review PDF.
- Compressing a figure-heavy manuscript to meet a journal submission limit.
- Extracting tables from PDFs into a spreadsheet for re-analysis.
- Redacting participant data before sharing a dataset publicly.
How to protect pdf in 3 steps
- Upload the PDF you want to secure.
- Set a strong password.
- Download the encrypted, password-protected PDF.
Built for the way researchers work
- ✓Accurate table extraction saves hours of manual data re-entry.
- ✓Participant data is processed then deleted for ethics compliance.
- ✓Free for grad students and labs on a tight grant.
Protect PDF — Frequently asked questions
Is Protect PDF free for researchers?
Yes. Accurate table extraction saves hours of manual data re-entry. There is no signup, no trial and no watermark on your files.
What kind of files can researchers use Protect PDF for?
Protect PDF works with the documents researchers handle every day — journal papers, datasets, grant proposals, survey results, literature reviews and conference posters. A common case: Merging dozens of source papers into one annotated literature-review PDF.
Where is my password stored?
It is never stored. Encryption happens in your session and the file is deleted afterward.
Can I remove the password later?
Yes. Anyone with the password can open and re-save the file without protection.
How do I put a password on a PDF?
Upload the file, type a strong password, and download an encrypted copy that will not open without it.
Can I protect a PDF before emailing it?
Yes. Ideal for contracts, financial and medical documents — share the password through a separate channel from the file.
What happens if I forget the password?
We never keep the password, so it cannot be recovered. Save it somewhere safe before sharing the file.
Does the password stop printing or copying?
The protection stops the file from opening without the password; once open, anyone with it can read and use it.