How to use Lock PDF
Choose the supported file or files, set the available processing options, run Lock PDF, then verify the result before downloading it.
What the tool does
Upload a PDF to your ToolTapGo server, add password protection with QPDF and verify the secured download with the exact password.
Supported inputs
One PDF smaller than 25 MB and a password containing at least six characters. The PDF and password are sent to the ToolTapGo server endpoint.
Actual output
A PDF preview or newly generated PDF file that should be opened and checked after download.
Privacy and processing
The page identifies whether the document is processed locally; sensitive documents should always be checked before use.
Limitations
This no-API implementation requires the free qpdf command-line program on the hosting server. Shared hosting may not provide it.
Common mistakes
Check that the selected input type, units and output format match the task. Do not discard the source before opening the result, and do not treat a preview, estimate or converted file as verified until you have reviewed it.
Frequently asked questions
What can I use Lock PDF for?
Upload a PDF to your ToolTapGo server, add password protection with QPDF and verify the secured download with the exact password.
What input does Lock PDF accept?
One PDF smaller than 25 MB and a password containing at least six characters. The PDF and password are sent to the ToolTapGo server endpoint.
What should I check after using Lock PDF?
This no-API implementation requires the free qpdf command-line program on the hosting server. Shared hosting may not provide it.
Related tasks and guides
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- Images to PDF — Combine several photos or images into one ordered PDF document.