Guides
Fixes and explainers for the problems that bring people here.
PDF Rotation Will Not Save
Why viewers rotate the view instead of the file, and how to make a rotation permanent.
GuideMerging PDFs Privately
How browser-based merging works, and how to verify a tool is not uploading your files.
GuideWhen PDFs Will Not Merge
The five reasons a merge fails — encryption, signatures, XFA forms, damage, size caps.
GuideSplitting a Signed PDF
Why splitting always invalidates a digital signature, and what to do instead.
GuidePDF Bad Parameter Error
Why Acrobat refuses to save a password-protected PDF, and how to encrypt it anyway.
GuidePDF Will Not Compress
Why re-compressing does nothing, and the three things that genuinely reduce file size.
GuidePDF Will Not Let You Sign
What actually blocks signing in Acrobat, and why most people do not need its signing workflow.
GuideWord Count Not Working
Why the count vanished or disagrees with someone else's, and what really counts toward a limit.
GuideWhy These Exist
Most of these questions have the same shape: something is not working, the error message does not explain why, and the search results are forum threads from 2014. Each guide gives the actual cause and the shortest fix, then points at the tool that does the job.
Every tool on this site runs in your browser, so the files involved are never uploaded — which is usually the right property for the documents these problems tend to involve.