Combine PDF files.
One clean document.
Drag to reorder, rotate pages, unlock encrypted files — then preview and save. Everything runs inside your browser.
Free · No account · No upload
Drop PDF files here
Multiple PDFs · merged in order · all processing stays in your browser
Three steps. One merged PDF.
Add your PDFs
Drop two or more PDF files onto the tool, or click Browse PDFs. Add more files at any time with the + card.
Reorder & rotate
Drag cards to set the final page order. Rotate pages 90° and unlock password-protected PDFs directly on each card.
Merge & save
Click Merge PDFs. Preview the full document, then save it to your device. Everything builds inside your browser.
Everything you need. Nothing you don't.
Drag-to-reorder
Drag any card to change the sequence. A numbered badge always shows the final order so there is no guesswork.
Per-file rotation
Rotate any PDF's pages 90° clockwise before merging — useful for scanned pages that came out sideways.
Password-protected PDFs
Enter the password directly on the card. The tool decrypts the file in your browser and includes it in the merge.
Thumbnail previews
Every card shows a rendered preview of the first page so you can confirm you have the right file before merging.
Preview before saving
After merging, open the full document in a modal viewer to check it before committing to a save.
Edit after merging
Not happy with the result? Click Edit on the result card to go straight back to the file list with no re-uploading required.
When merging PDFs saves the day.
Contracts and agreements
Combine a contract body, appendices, and signature pages into one document for signing or archival.
Invoices and receipts
Bundle multiple invoices into a single PDF for accounting, expense reports, or submission to a finance team.
Scanned documents
Scanners often produce one PDF per page — merge them into a single multi-page document.
Application packets
Combine a CV, cover letter, portfolio, and certificates into one file for job applications.
Reports and presentations
Merge chapter exports or slide handouts into one complete document for distribution.
Research and study notes
Merge lecture slides, papers, and personal notes into a single reference file.
How the merge actually works
When you add files, PDF.js renders the first page of each file to a canvas and creates a thumbnail — entirely in your browser, with no upload. For password-protected files, PDF.js decrypts the content locally using the password you provide.
When you click Merge, pdf-lib copies the raw page objects from each source PDF into a new output document. No page is re-rendered or re-compressed, so text stays selectable, images keep their original resolution, and fonts are preserved exactly as they appear in the originals. The finished PDF is created as a Blob directly in your browser and offered via a Save As dialog.
Processing happens on your device. Because no files are uploaded, all the work is done by your computer or phone. Larger files or batches with many pages may take longer depending on your device speed and available memory.
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