Merge PDFs into one document

Frequently asked questions

Several PDFs, one file to submit

Applications love to ask for "a single PDF" containing several things — a form, supporting certificates, an ID proof, maybe a covering letter. If those arrive as separate files, this tool joins them into one document in the order you set. Add two or more PDFs, arrange them, and merge; the result is a single file ready to upload.

Quality and order

Merging here is lossless. Pages are copied intact into the new document — nothing is re-compressed or re-rendered, so text stays selectable and images keep their original quality. Order is entirely under your control: arrange the files before merging and the combined PDF follows your sequence exactly, first file to last.

Things worth knowing

• There's no fixed file limit — memory is the only real constraint, and dozens of ordinary documents merge in seconds.
• Encrypted PDFs need unlocking first. A password-protected file usually won't load; remove the password (open it, then print-to-PDF) before merging.
• Merging can push you over an upload cap. If the combined file is too big, follow up with the PDF compressor to bring it under the limit.
• Need to add photos as pages? Convert them with JPG to PDF first, then merge the result in.

Handled entirely in your browser

The merge runs locally using pdf-lib — your documents are combined in memory and the finished file downloads straight to you. Nothing is uploaded, so even a merge of sensitive paperwork stays private to your machine.