๐ July 28, 2026 ยท 4 min read ยท Merge PDF tool
Why free mergers add watermarks
The dirty secret of "free" PDF tools: most of them are freemium. The free tier stamps a watermark on every page; you have to pay $9.99/month to remove it. They monetize your document.
The clean alternative
Our merge tool never adds a watermark. Why? Because it's not a SaaS โ it's a static website. The merge logic runs in your browser using pdf-lib. We have no incentive to deface your documents because we don't host your files in the first place.
How to merge cleanly
- Open the merger.
- Drop all your PDFs (any number of files).
- Drag the โ ฟ handle to reorder.
- Click Merge. Done.
Common merge problems & fixes
Bookmarks get lost
Our merger preserves each source PDF's outline. So if your first PDF had chapters 1-5 bookmarked, those bookmarks survive in the merged file. We also keep all link annotations.
Page sizes look inconsistent
If one PDF is A4 and another is US Letter, the merged file keeps both page sizes. If you want uniform sizing, open the result in any PDF editor and use "Page โ Resize".
Password-protected PDFs
Unlock them first (we can't merge encrypted files). Use Acrobat or your favorite reader's print-as-PDF trick.
When you'd want a watermark anyway
Internal review docs. "CONFIDENTIAL โ DRAFT" stamps are useful when distributing early drafts. For that, use the compressor โ wait, no, use Adobe Acrobat for stamps. We're not building a stamp tool, but we don't judge if you want one.