Combine multiple PDFs into one document. Reorder, remove any file, full original quality preserved. Nothing leaves your device.
Last updated: August 2026
30 files
Merge in one run
Drag & drop
Reorder, plus up/down buttons
Full quality
No rasterizing or recompression
Private
No uploads
Drop two or more PDFs here
Select multiple files at once, or add more after
Your files never leave this device
Five steps, all running locally in your browser.
Add your PDFs
Drop two or more files, or pick them from the dialog. Nothing uploads, it stays on your device.
Check the file list
Each file shows its page count. Unreadable files (e.g. password protected) are flagged individually.
Reorder if needed
Drag a row, or use the up/down buttons. The merged file follows this exact order.
Remove anything extra
Click the x on any file to drop it from the batch before merging.
Merge and download
Pages are copied into one new PDF at full original quality, download starts right away.
Reordering and mistakes are the two things that actually go wrong when merging PDFs, so both get first-class controls.
Drag or button reordering
Drag any row to a new spot, or use the up/down buttons, which also work reliably on touch devices where list dragging often doesn't.
Per-file page counts
Every file shows its page count the moment it's added, plus a running total, so you know exactly what you're about to produce.
Bad files flagged, not fatal
A password-protected or corrupted file is called out individually and skipped at merge time, the rest of your batch is unaffected.
Add files at any point
Start with a couple of files and keep adding more before you merge, no need to restart the batch.
Full original quality
Pages are copied directly, not rendered to images and reassembled, so text stays selectable and images keep their original resolution.
Remove anything, anytime
Change your mind about a file before merging with a single click, no need to start the upload over.
A naive way to combine PDFs would be to render every page to an image and paste those images into a new document, the same approach a screenshot-and-reassemble tool would take. That approach quietly throws away selectable text, shrinks image resolution to whatever the render happened to use, and bloats the file. This tool doesn't do that.
Instead, each page in a PDF is its own object in the file, referencing its own content stream, fonts and images. Combining files means copying those page objects directly into a new document's object graph and appending them in the order you chose, the same operation a desktop PDF editor performs internally. Nothing is decoded to pixels and re-encoded, so text stays selectable, fonts stay embedded, and images keep their exact original resolution and compression.
If you only need to trim, split or rebuild a document from scratch rather than combine already-complete files, pair this with PDF to Images to pull specific pages out first, then Images to PDF to rebuild exactly the pages you want before merging them in. And if the result of a merge is larger than you'd like, Compress PDF Images can shrink the embedded photos afterward without touching text or layout.
Expecting bookmarks or a table of contents to carry over
Page content, fonts and images copy over exactly, but document-level bookmarks and outline entries from the source files aren't merged in. If you rely on a PDF's bookmark panel, check the merged file afterward.
Forgetting to check the order before merging
The final document follows the order shown in the list top to bottom. It's easy to add files in the wrong sequence when picking several at once, always glance at the numbered list before clicking Merge.
Assuming a password-protected file will just work
A file that needs a password to open is flagged with an error and excluded automatically rather than silently failing the whole batch. There's currently no way to enter a password to unlock it first.
Trying to merge only some pages from a file
This tool combines whole files. For a subset of pages, extract what you need first with PDF to Images, rebuild a trimmed PDF with Images to PDF, then merge that alongside the rest.
Hitting the 30-file limit without noticing
If you drop more files than the limit allows, only the files that fit are added and a message explains how many were skipped. Remove a file already in the list to make room for another.
No. Merging copies each page's underlying content, fonts and embedded images directly into the new document rather than rendering pages to images and reassembling them. The result is pixel-for-pixel identical to the source pages, just combined into one file.
Up to 30 files in a single run. This limit exists to keep everything running smoothly in your browser's memory, since every file is processed on your device rather than a server.
Yes. Drag any file to a new position in the list, or use the up and down arrow buttons next to each file, which also work on touch devices where dragging a list is unreliable. The final PDF follows the order shown in the list, top to bottom.
That file is flagged with an error message directly in the list and is excluded from the merge, but the rest of your files are unaffected and can still be combined. Support for entering a password to unlock a file before merging isn't currently available.
Not on this tool, it combines whole documents in the order you set. If you only need certain pages from a file, use PDF to Images first to extract the pages you want as images, then Images to PDF to rebuild a trimmed document before merging it with the rest.
Page content, fonts and images carry over exactly. Document-level bookmarks and outline entries from the original files are not copied into the merged document in this version.
There's no hard-coded size limit beyond the 30-file count, but since everything runs in your browser's memory rather than on a server, very large batches (hundreds of megabytes combined) may be slower or run into your device's own memory limits.
No. Reading each file, copying pages and assembling the merged document all happen entirely in your browser using pdf-lib. Your files never leave your device. You can disconnect from the internet after loading the page and the tool still works.
No sign-up. No uploads. Drop your files above and download the merged PDF in seconds.
