Organize PDF

Merge PDF

Combine several PDF files into one, in the order you add them.

PDF files

Choose the files to process — you can select more than one. They’re handled locally and never uploaded.

Output

Result appears here after you select

{ } How to use

  1. Add two or more PDF files.
  2. Drag the file cards to set the order.
  3. Select Process to combine them into a single PDF, then download it.

{ } What merging keeps, and what it does not

Pages are copied into a new document one file after another, in the order of the file cards. Because pages are copied rather than re-rendered, text stays selectable, fonts stay embedded and images keep their original compression — which is also why the merged file is roughly the sum of the inputs.

  • Page sizes and orientations are kept per page: an A4 file merged with a Letter file gives one document containing both sizes.
  • Annotations that belong to a page, including link annotations, travel with that page.
  • Bookmarks (the outline) of the source files are not carried over; the merged file has no outline.
  • The merged file starts with fresh document properties rather than inheriting one source file’s title or author.

{ } Password-protected files

A file that needs a password to open cannot be merged as-is — the tool reports an error rather than silently skipping it. Remove the password with Unlock PDF first, then merge.

{ } Order, size and limits

  • Files merge top-to-bottom in the order shown; drag the cards to change it before you press Process.
  • There is no fixed file-size or page-count limit — the limit is your device’s memory. In a test build, a 300-page and a 200-page file merged into 500 pages in under a second on a laptop.
  • Inputs are held in memory while merging, so a phone with little free memory may fail on files of several hundred megabytes where a desktop browser succeeds.
  • The output is always a single PDF (merged.pdf), never a ZIP; the summary shows how many files and pages went in.

{ } How it works

Merge PDF works on the files you upload. Select Process ▸ and it runs entirely in your browser — nothing is uploaded to a server — then shows the result in the Output panel.

Input

  • PDF files — add the files to process (.pdf); they are read locally in your browser

Output

A downloadable PDF file — use the Download button in the Output panel.

{ } Common uses

  • Assemble chapters or scanned batches into one document.
  • Attach a signed cover page to a contract.
  • Combine multiple exports into a single report.

{ } Limitations

  • Pages are copied as-is (no re-encoding), so quality is preserved but file size is roughly the sum of the inputs.
  • Form fields with identical names across files can collide; flatten forms first if that matters.

{ } Troubleshooting

The pages came out in the wrong order.

Reorder the file cards before processing — files merge top-to-bottom in the order listed.

The merged file is large.

Run the result through Compress PDF to shrink it.

{ } FAQ

Is my data uploaded to a server?

No. Everything runs locally in your browser — your files never leave your device.

Can I process more than one file at once?

Yes — add several files and they’re all processed and downloaded together as a ZIP.

Is this tool free?

Yes — it’s completely free and needs no sign-up.

Does merging reduce quality?

No. Pages are copied without re-encoding, so text stays sharp and images are untouched.

Is the output one file or a ZIP?

One combined PDF — merging never produces a ZIP.

{ } Guides