Merge PDF
Drop your PDFs, reorder them, and we'll stitch them into a single document.
Drop your files here
Up to 20 files, 1024 Mb each.
How to merge PDF files
Why merge PDF files?
A PDF starts life as one file, but the documents you actually work with rarely arrive that way. A signed contract might be an offer letter, an addendum, and a scanned signature page saved separately. A month of invoices might sit as a dozen downloads that a client wants as a single attachment. A job application might need a CV, a cover letter, and a portfolio bundled into one packet before an ATS will accept it. Merging turns those scattered pieces into one clean, ordered, shareable document.
Doing this by hand in a full PDF editor is slow, and many desktop tools silently re-compress every page — dropping image quality and bloating fonts in the process. This tool takes a different approach: it concatenates the source documents losslessly. Pages, embedded fonts, and vector graphics are carried across byte-for-byte, so text stays selectable and searchable and nothing is degraded. It runs in a Rust service over an encrypted TLS connection, your files are never shared, and the uploaded bytes are auto-deleted the moment the merged PDF is sent back.
Common reasons people merge PDFs
• Contracts and agreements — combine the main body, annexes, and a signed page into one file before archiving or sending.
• Invoices and receipts — bundle a period of invoices into a single document for accounting, reimbursement, or a tax return.
• Reports and proposals — join a cover page, an executive summary, and appendices exported from different tools into one deliverable.
• Scanned paperwork — most scanners and phone scanner apps save one page per file; merging reassembles them in the right order.
• Study material — stitch lecture slides, handouts, and notes into a single revision file you can annotate in one place.
• Application packets — combine a resume, cover letter, certificates, and references so a portal accepts a single upload.
Get the page order right the first time
The single most common mistake when merging is order. The merged file follows the exact sequence of the thumbnails, top to bottom, so drag them into place before you download rather than fixing it afterwards. A quick way to stay organized: name your source files with a numeric prefix (01-cover.pdf, 02-body.pdf, 03-appendix.pdf) so they sort predictably, then confirm the order in the drop-zone. If a single document is out of sequence internally, use Split PDF first to separate its pages, then merge them back in the order you want.
File size, bookmarks, and other things to watch
Because merging is lossless, the combined file is roughly the sum of its parts — merge ten 3 Mb reports and you'll land near 30 Mb. If the result needs to travel by email or fit an upload limit, run it through Compress PDF afterwards. Two other caveats are worth knowing. Interactive elements — bookmarks, internal links, and form fields — can shift or flatten when documents from different sources are combined, so double-check them if your workflow depends on them. And encrypted PDFs can't be merged while they're locked: open the file, re-save it without a password, then upload the unprotected copy.
Frequently asked
Is merging PDFs free?
Yes. There's no signup, no watermark, and no daily quota. Every merge is free.
How many files can I merge at once?
Up to 20 PDFs per merge, 20 Mb each. To combine more, merge in batches and then merge the results.
Can I choose the order the files appear in?
Yes. Reorder the thumbnails by dragging them before you download. The final document follows the order you set, top to bottom.
Are my files stored on your servers?
No. Files travel over an encrypted TLS connection, are processed in memory, and are auto-deleted the moment the merged PDF is sent back.
Does merging reduce the quality of my PDFs?
No. We concatenate the source pages losslessly — text stays selectable, images are not re-compressed, and vector graphics are untouched.
Can I merge password-protected PDFs?
Not directly. Remove the password (open the file and re-save it without encryption) first, then upload the unprotected copy.
Will bookmarks and form fields survive?
Page content, text and images always carry over. Interactive bookmarks and form fields can shift or flatten when documents are combined, so verify them after merging if you rely on them.
Can I merge scanned PDFs?
Yes. Image-based (scanned) PDFs merge exactly like text PDFs — each scanned page is placed in order in the output.