Merge PDF Files Online
Combine several PDF files into a single document, in the order you choose. Everything happens in your browser — your PDFs are never uploaded.
Reviewed by Ismail Sab Ajnalkar · Updated July 2026
File converter
Merging PDFs combines several files into one clean document in the order you choose. It's one of the most common document tasks: stitching a signed contract onto its cover letter, combining scanned receipts for an expense report, or assembling chapters into a single deliverable. Instead of sending five attachments, you send one.
File Transmute merges your files in your browser — they're never uploaded to a server. That keeps confidential paperwork private, removes any upload wait, and means there's no cap on how many files you combine or how large they are. Just add your PDFs, drag them into the right order, and download the combined file instantly.
Because the merge happens on your device, it's also fast: there's no round-trip to a server and back, so even a large stack of documents combines in moments. Page order is preserved exactly as you arrange it, and the original files are left untouched.
Merging pairs naturally with the rest of the PDF toolkit. Split a PDF first to pull out just the pages you need, then merge them with another document; add page numbers to the combined file; or run Compress PDF afterward if the merged result is large. Everything runs locally, so your documents never leave your computer at any step.
Best for
- Combining scanned pages, receipts, or signed forms into one file
- Assembling chapters or reports into a single document
- Merging a cover letter and portfolio before an application
Good to know
Files merge in the order you arrange them, and each file can be up to 50 MB. Merging preserves the original pages exactly — it doesn't re-compress or re-flow them.
How to convert Multiple PDFs → One PDF
Drop two or more PDF files into the converter above.
They'll be combined in order — remove or re-add files as needed.
Click Convert to download one merged PDF.