Merge PDF
Merge PDF files into a single document in your browser. Add two or more PDFs, reorder them with the up and down arrows, remove any you do not want, and download the combined file.
Combine several PDFs into one file.
How to use Merge PDF
- Add two or more PDF files from your device
- Drag the files into the order you want them combined
- Click merge, then download the single joined PDF
About Merge PDF
Merge PDF combines two or more documents into a single file. Add every PDF you want to join, put them in the order you need with the up and down arrows, remove any you added by mistake, and click Merge to download one combined merged.pdf. The joining is done by pdf-lib, a library that runs inside the page: pages are copied as objects rather than re-rendered, so vector text stays selectable and searchable, fonts travel with their pages, and image quality is exactly what it was in the source.
There is no software to install and no Adobe Acrobat subscription to buy. It does the same combine-into-one job as those paid tools — free, with no watermark and no sign-up — and it happily merges many files at once: a whole folder of scans, or an application packet built from a cover letter, CV and reference letters exported by different apps. Because nothing is recompressed, the merged file is roughly the sum of its inputs; there is no page or size cap beyond your device's memory, and a few hundred pages is routine.
Two honest limits. Password-protected PDFs are detected and refused, so save an unlocked copy first. And only page content is copied — the bookmark outline, interactive form fields and source metadata are not rebuilt in the output. Everything happens in your browser: your files are never uploaded, and the merged PDF exists only in memory until you download it.
Frequently asked questions
- How do I merge two or more PDF files into one?
- Add the PDFs you want to combine, arrange them with the up and down arrows so they sit in the order you want, then click Merge. Every page of the first file comes first, followed by every page of the next, and the result downloads as a single merged.pdf.
- Can I merge many PDF files at once?
- Yes. Add as many PDFs as you need in one pass and they are all combined in the order shown, top to bottom. There is no cap on how many files you drop in, so a whole batch of documents becomes one file in a single merge.
- Is this PDF merger free, with no watermark or account?
- Yes. Merging is completely free, stamps no watermark on the result, and needs no sign-up or email. The whole tool runs in your browser tab, so there is nothing to pay for and no daily usage limit.
- Do I need Adobe Acrobat or any software to merge PDFs?
- No. This does the same combine-into-one job as Adobe Acrobat's merge feature without the paid subscription. It runs in your browser, so there is no freeware to download and nothing to keep updated.
- Can I change the page order or remove a file before merging?
- Yes. Each file appears in a list with up, down and remove buttons. Files merge top to bottom, and every page of each file stays in its original internal order.
- Will the quality of my PDFs change?
- No. Pages are copied as objects rather than re-rendered, so text remains selectable and searchable, and images are byte-for-byte the originals.
- Is there a file-size or page limit?
- The tool sets no limit on file count, page count or size. Merging happens in your device's memory, so very large scans (hundreds of megabytes) may fail on a phone or a low-memory laptop where a desktop handles them fine.
- Can I merge a password-protected PDF?
- No. Encrypted files are detected and refused with a message. Open the file with its password in any PDF viewer, choose Print then Save as PDF to make an unprotected copy, and merge that.
- Can I merge PDFs with different page sizes or orientations?
- Yes. Every page keeps its own dimensions and rotation, so an A4 portrait page followed by a Letter landscape page merge as-is.
- Does merging keep bookmarks and links?
- Links drawn on a page are part of that page and are copied with it. The bookmark outline in the sidebar is a document-level structure and is not carried into the merged file, so you would need to recreate it in a PDF editor.
- Do fillable form fields survive the merge?
- Not as working fields. Only page content is copied, so a form's boxes appear on the page but the interactive field definitions are not rebuilt in the merged document.
- Why is the merged file about the same size as all the inputs added together?
- Because nothing is compressed or downsampled during the merge. If the result is too large to email, run it through the Compress PDF tool afterwards.
- Can I merge two copies of the same PDF?
- Yes. Add the file twice and its pages appear twice in the output, which is a quick way to duplicate a document.
- Are my PDFs uploaded while merging?
- No. The files are read and combined by code running in this page, and the merged PDF exists only in your browser's memory until you download it.