Merge PDF files online — offline & private

Combine two or more PDFs into a single, perfectly ordered document. PolyForge merges them locally in your browser with pdf-lib, so your files never leave your device. Bookmarks, page-size normalization and duplex padding included.

How to Merge PDF files online — offline & private

1. Step 1. Click the upload box or drag two or more PDF files into it.
2. Step 2. Arrange the files in the exact order you want them to appear.
3. Step 3. Optionally set an output filename, page size, or bookmark generation.
4. Step 4. Click Execute — the merged PDF is built in your browser and downloads instantly. Nothing is uploaded.

Frequently asked questions

Is it free to merge PDF files online?

Yes. PolyForge merges PDFs for free, with no signup or watermark. Merging runs 100% in your browser — your files are never uploaded to any server.

How many PDFs can I merge at once?

You can merge up to 10 PDFs per job. Since everything happens locally, very large files depend only on your device memory rather than a server limit.

Will merging change the quality or layout of my pages?

No. Pages are copied losslessly with pdf-lib — fonts, images, and vector graphics stay exactly as they were. Page size standardization is optional and off by default.

Can I merge password-protected PDFs?

Not directly. Encrypted files are skipped with a warning. Unlock each file first with the Remove Password tool, then merge the decrypted copies.