Merge PDF
Combine multiple PDF files into a single document — entirely in your browser.
Drag and drop or click to select 2 or more PDF files.
Drag files to reorder them however you want.
Click Merge PDFs and your combined file downloads instantly.
Frequently Asked Questions
Is it safe to merge PDFs online?
Yes. ChopFile processes everything in your browser. Your files are never uploaded to any server.
How many PDFs can I merge?
There's no hard limit. It depends on your device's memory. Most devices handle dozens of files easily.
Can I reorder the files before merging?
Yes. Drag and drop to rearrange files in the order you want.
Does merging reduce PDF quality?
No. ChopFile copies pages directly without re-rendering, so quality is identical to the originals.
Can I merge password-protected PDFs?
No. You'll need to unlock them first using our Unlock PDF tool, then merge the unlocked files.
What's the maximum file size?
There's no hard limit, but very large files (200MB+) may be slow on devices with limited memory.