Initializing secure environment…
Initializing secure environment…
Merge any number of PDF files into one document, in the order you choose. Drop them in, drag until the sequence is right, and merge. Pages are copied across without re-encoding, so text stays selectable and images stay sharp. There is no file count limit, no size cap of our own, no account and no watermark. The whole operation happens inside this browser tab, which is why it keeps working on a plane, in a bank, or on a machine that is not allowed to reach the internet at all.
To merge PDFs free, add your files to this page, drag them into the order you want, and press Merge PDFs. The combined file is built entirely in your browser — nothing is uploaded, and there is no watermark and no sign-up.
Order is the whole job. Drag a card up and every card below it shifts down by one, so a single move can put a cover page back in front. If the result looks wrong, the mistake is almost always one file in the wrong position rather than a failed merge — check the list, not the output.
Merged scans are still scans: the text layer stays per file and page numbers restart if the scans came from different jobs. If the combined document needs to be searchable, run OCR on the merged file rather than on each input, so page numbers and the text layer stay in step.
Merging adds structure, not much data, so the result should be close to the sum of the inputs plus a few kilobytes. If it is dramatically larger, one of the inputs probably carries a shared font or resource set that is duplicated on import. Compress afterwards, or use Flatten PDF to drop unused resources.
Mail providers cap attachments between 20 MB and 25 MB. Merging makes the problem bigger, not smaller — if the combined file is over the cap, compress the merged document or split it by size instead, and send the parts as a ZIP.
Both work, but phones have roughly a third of the memory a desktop has. Keep batches under about 50 MB per file and a few hundred pages in total, and close other tabs first. On a desktop the same job with 150 MB of input is unremarkable.
No limit on the number of files. The real ceiling is your device's memory — a desktop comfortably merges hundreds of pages, and a phone will start to struggle somewhere past a few hundred. If a merge fails, the tool tells you which file it was working on when memory ran out.
No. Pages are copied into the new document as-is. Text stays selectable and searchable, vector graphics stay vector, and photographs are not re-encoded. The only thing that changes is the file size, which is roughly the sum of the inputs.
Yes. Each page keeps its own size, so a mixed A4 and US Letter document merges fine and stays that way. If you need one uniform size, use Crop and Resize first and then merge.
Bookmarks from every input are carried over. Internal links between pages inside the same source file keep working; cross-file link targets are dropped, because the page they pointed at may now be a different page in a different position.
Yes. No account, no trial countdown, no watermark and no per-file cap. The tool is funded by nothing, which is possible precisely because your file is never uploaded and no storage is needed.
Yes, as long as you can open them. Encrypted files with an empty user password are read directly. Files protected with a real password need to be unlocked first — use Remove Password, which needs the password and does it locally.
Yes. After the first page load this tool is fully cached, so merging works with the network switched off. Nothing about merging requires a round trip.
Almost always memory. A merge holds every input and the output in RAM simultaneously, so the peak is larger than the sum of the file sizes. Close other tabs, retry, or split the job into two merges and merge the results.
Not in this tool — it takes PDFs only. Convert first: Word, Excel, PowerPoint, images, HTML, Markdown, CSV and eBooks all have converters here, and the result drops straight into the merge list.
More essential pdf tools — all free, no upload.