PDF how-to guides
Task guides for the jobs people actually get stuck on: a file that is too big to send, several documents that need to become one, a signed PDF that must stay valid. Each one names the real limits instead of promising a result.
Where a free browser tool does the job, the guide links to it. Where Mac Preview, Word or your phone does it better, the guide says so.
Guides on PDF how-to guides
- How to merge or combine PDF files without Adobe
How to merge PDF files and combine PDFs without Acrobat on Windows, Mac and iPhone, including how to merge two PDF files in under a minute, free.
- Can you merge a PDF without losing its digital signature?
Merge PDF without losing a digital signature? You cannot: a merge copies pages into a new file. Why it breaks, three workarounds, and our warning.
- How to Reduce PDF File Size Without Losing Quality (2026)
Reduce PDF size without losing quality: keep text selectable with a free browser tool, Mac Preview or Word's minimum size export. DPI guide, no upload.
- Compress PDF Without Losing Quality: What You Can Keep
Compress a PDF without losing quality where it counts: keep text sharp and selectable, and choose how much the images give up. Free, in your browser.
- PDF too big to email: the limits and the fixes
PDF too big to email? Gmail, Outlook, iCloud and Kindle limits as read in October 2026, why your real limit is lower, and which size to compress to.
- How to compress a PDF for email on an iPhone without an app
Compress a PDF for email on your iPhone with Safari and no app. Steps, which size to pick, Mail Drop and Gmail limits, and what to do if it stays large.
Related pages on PDF how-to guides
- All PDF tools: every tool, with a sentence on what it does
- Compress to an exact size: 100 KB to 10 MB targets for portals and email