PDF Merge

Combine multiple PDFs into a single file, with the order fully under your control — for assembling chapters, scans or invoices into one deliverable.

Steps

1. File tools → PDF Merge
2. Choose two or more PDF files
3. Use the up/down arrows to set the order (top of the list merges first)
4. Check the file count and total page count in the summary
5. Click Merge and save and choose the output PDF path

Rules

• List order is merge order
• At least two files — otherwise the merge button stays disabled
• Original pages are kept: no resizing, rotation or scaling
• No bookmarks: the output does not inherit bookmark structures
• Single PDF output, named firstfile_merged.pdf

Use Cases

• Assemble a chapter-split tender or thesis into one document
• Merge ordered scans into an archive file
• Combine monthly reports into an annual collection

Notes

1. Encrypted PDFs are not supported
2. Order matters: upload order is not necessarily the merge order — fix it with the arrows
3. Output path must differ from every source file
4. Size: roughly the sum of the inputs; no compression is applied
5. Mixed page sizes are preserved as-is, so pages may look inconsistent when read

FAQ

Q: The merged order is wrong.

A: Reopen the tool, set the order with the arrows so the list matches your intent, and merge again.

Q: Can the result be split again?

A: Yes, with PDF Split by fixed page count — but you have to estimate the original boundaries.

Q: Are bookmarks preserved?

A: No. Merging concatenates page content only and does not keep or create bookmarks.

Q: Can PDFs with different page sizes be merged?

A: Yes, each page keeps its own size. Normalize the sizes afterwards with another tool if needed.

Q: Merging is slow or fails.

A: Reduce the number of files per run, confirm each file opens normally, and make sure there is enough disk space.