How do I merge PDF files?

Drop two or more PDFs onto the merge tool, reorder them if you want, and click Merge. The combined PDF downloads instantly.

Is there a file size limit when merging PDFs?

PaperKit runs in your browser, so the only practical limit is your device memory. Most users merge dozens of PDFs without issues.

No. The merge happens 100% in your browser, so your files never leave your device.

Merge, Compress, Sign, convert, and clean up files without uploading them.

Merge PDF — Combine multiple PDF files into one PDF in the order you choose, fast and free in your browser.
Split PDF — Split a PDF into multiple files by page ranges. Get one output per range, downloaded as a zip.
Compress PDF — Reduce PDF size by re-encoding images and stripping metadata. Works for most scanned PDFs.
Image to PDF — Convert JPG, PNG, or WEBP images to a single PDF. Drop images and download a clean PDF.
PDF to Text — Extract plain text from a PDF in the browser. Copy it or download as .txt.
Sign PDF — Add a typed or drawn signature to a PDF in the browser, then download the signed file.
Add Page Numbers — Add page numbers to a PDF in the position and style you choose. Free and private.
Watermark PDF — Add a diagonal text watermark to every page of a PDF, with adjustable opacity.
Rotate PDF — Rotate selected pages of a PDF by 90, 180, or 270 degrees and save the result.
Remove Pages — Delete pages from a PDF by entering page numbers or ranges. Keep everything else.
Remove PDF Metadata — Strip author, title, producer, and keyword metadata from a PDF to protect privacy.
Resize PDF — Resize PDF pages to A4, US Letter, or custom dimensions in millimeters or points.