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How to Add a Password to a PDF Online
Synthixx Tools Team
Protect a PDF with a password before you share it. Free Protect PDF guide on Synthixx Tools.
Why password-protect a PDF
Passwords reduce casual access when emailing contracts, HR packs, or invoices. They are not a substitute for full enterprise DRM, but they are a practical share control.
Steps on Synthixx
- Finish editing/merging first.
- Open Protect PDF.
- Upload, set a strong password, run the job.
- Download and share the protected file through a separate channel when possible.
Later access
If you own the password and need an open copy, use Unlock PDF. Read Protect vs Unlock for intent differences.