PDF merge & split
Combine PDFs, pull out pages, or drop the ones you do not want — without the file leaving your device.
Runs entirely in your browser. Nothing you enter is uploaded.
How this works
The three operations
Almost everything people need to do to a PDF that does not involve editing its content is one of three things.
- Merge. Several files become one, in the order you set. Useful for assembling a submission from separately scanned parts, or putting an appendix behind a report.
- Extract. Keep only the pages you name. Useful for sending one section of a long document without handing over the whole thing.
- Remove. Delete the pages you name and keep everything else. Useful for dropping a blank scan, a cover sheet, or a page you would rather not circulate.
Extract and remove are opposites of the same selection, which is why they share the page-range box. If it is easier to describe the pages you want to lose than the pages you want to keep, use remove.
Order matters when merging
The merged file follows the order shown in the list, not the order the files were selected in — file pickers sort alphabetically, which puts “page10” before “page2” and produces a scrambled document. Use the arrows to arrange the list before merging, and check the first and last file are where you expect.
What is preserved, and what is not
Pages are copied whole, so text stays selectable, images keep their original resolution, and nothing is re-compressed or degraded. Vector content stays vector.
Some document-level features do not survive being copied into a new file:
| Feature | After processing |
|---|---|
| Page content, text, images | Preserved exactly |
| Bookmarks and outline | Not carried across |
| Form fields | May lose their values |
| Digital signatures | Invalidated — any change breaks the signature |
| Internal links between pages | May break if the target page was removed |
The signature point is worth dwelling on: a digital signature exists to prove a document has not changed since it was signed. Splitting or merging changes it, so the signature correctly stops validating. There is no way around this, and a tool that claimed otherwise would be broken.
Why local processing matters more here than elsewhere
PDFs are what people use for the documents they care most about: contracts, tax returns, medical letters, identity documents, unreleased financial statements. The standard way free PDF tools work is to upload that file to a server, process it, and let you download the result — which means a copy existed on infrastructure you cannot inspect, governed by a retention policy you did not read.
Browsers have been able to read and write binary formats in memory for years. Doing it locally is not a compromise for the sake of privacy; it is faster too, because there is nothing to upload and nothing to wait behind.
If you handle documents under a confidentiality obligation, this distinction is not theoretical. Uploading a client's contract to an unknown processor can itself be the breach, regardless of what happens to the file afterwards.
Common questions
- Is my document really not uploaded?
- Really not. The PDF is read into memory by JavaScript, rewritten there, and handed straight back to you as a download. You can check by opening your browser's network inspector while you use it, or by disconnecting from the internet after the page loads — it keeps working. For contracts, medical records and anything under an NDA, this is a materially different arrangement from a site that uploads your file.
- Is there a page or size limit?
- Only what your device can hold in memory. There is no server, so no upload cap, no queue, and no daily allowance. Very large documents — hundreds of megabytes — may be slow, and may fail on a phone with little free memory.
- Will it add a watermark?
- No. The output is your pages, unmarked. Watermarks on free PDF tools exist to sell the paid tier; there is no paid tier here.
- Can it open a password-protected PDF?
- Not reliably. It will attempt to read documents with owner restrictions, but a file encrypted with a user password cannot be opened without that password. Remove the password in your PDF reader first, then bring the file here.
- How do I write the page range?
- Use commas for separate items and hyphens for ranges: "1-3, 5, 8-". Leaving one side of a hyphen blank means "from the start" or "to the end", so "8-" is page eight onwards. Duplicates and out-of-range numbers are ignored rather than causing an error.