PDF Merger

Popular

Click or drag PDF files here

Add two or more files to merge them into one document.

PDF · up to 50 MB each

Files are processed locally — they never leave your browser.

About PDF Merger

PDF Merger combines multiple PDF files into a single document in your chosen order. Drag and rearrange pages before merging to produce exactly the output you need. The merge operation runs entirely in your browser using pdf-lib — no files are uploaded to any server, making it safe for confidential documents, contracts, and medical records.

How it Works

1Upload two or more PDF files using the file picker.
2Drag the file cards to reorder them — the final PDF will follow this order.
3Click Merge to combine all pages into a single PDF.
4Download the merged file to your device.

Frequently Asked Questions

Is there a limit on how many PDFs I can merge?

There is no hard limit on the number of files. The practical limit is your device's available memory. Merging 10–20 PDFs of typical size (1–5 MB each) works smoothly on most modern devices.

Will merging affect the quality of the PDF content?

No. The merger copies pages from each source PDF byte-for-byte into the output document. Images, fonts, vector graphics, and text are not re-encoded or re-compressed. Quality is identical to the original.

Can I merge password-protected PDFs?

Password-protected PDFs cannot be merged directly — the encryption prevents reading the page content. Remove the password first using the PDF Unlock tool, then merge the unlocked files.

What happens to PDF forms, bookmarks, and annotations in the merged file?

Pages are copied including their annotations and form fields. Bookmarks (document outlines) from the individual source files are not automatically merged into a combined outline — the output will have no bookmark tree. Add bookmarks manually in a PDF editor if needed.

Related Tools

PDF Editor PDF Compressor Image to PDF

Command Palette

About PDF Merger

How it Works

Frequently Asked Questions

About PDF Merger

How it Works

Frequently Asked Questions