PDF Merge

How to use it

1. Click the file picker and choose two or more PDF files. Hold Ctrl or Cmd to select several at once.
2. Each file is read locally and its page count is shown in the merge list.
3. Reorder the list with Up and Down — the top file becomes the first pages of the result.
4. Use Remove to drop a file you picked by mistake.
5. Click Merge PDFs, then Download to save the combined document.

Common use cases

• Combining scanned documents — merge receipts, contracts or reports into one file before sending.
• Assembling a packet — put a cover page, terms and appendix in exactly the order you choose.
• Rejoining split exports — files that were exported or emailed in pieces become one document again.
• Checking page counts first — the list shows how many pages each file adds before you commit.

Why it stays private

Merging is done by pdf-lib inside your browser's memory. Files are read with the File API, never sent to a server, and no network request is made at any point, so confidential documents stay on your device.

FAQ

Q: Is there a limit on how many files I can merge? A: There is no hard limit, but every file is held in memory at once, so very large batches are better merged in smaller runs.

Q: Does merging change the pages themselves? A: No. Pages are copied as they are — text, fonts, images and annotations travel with them. Only the order is decided by the list.

Q: Can I merge password-protected PDFs? A: Not here. The parser rejects encrypted documents, so remove the password first or use a dedicated decryptor.