PDF Merger

Combine multiple PDFs into one. Drag to reorder, click to merge. Everything happens in your browser — no uploads, no signup.

Overview

How to merge PDFs into one file

Merge any number of PDFs into a single file. Drop your PDFs, drag them into the order you want, click Merge. The output preserves the original page sizes, fonts, and embedded media. Built with pdf-lib (MIT, pure JavaScript) — no server, no waiting in a queue, no upload size limits beyond what your browser can handle.

Use cases

When to merge PDFs into one file

  1. 01

    Combine multiple bank statements into one PDF for taxes

  2. 02

    Merge a cover letter and resume into a single PDF for an application

  3. 03

    Assemble scanned pages into one document

  4. 04

    Concatenate research papers into a single reading file

Examples

PDF merger examples

3 single-page PDFs → merge in order

ex 01

1 PDF with 3 pages, total size approximately equal to the inputs combined

Standard merge with page-size preservation.

10 mixed-size PDFs → merge

ex 02

1 PDF, each original document's pages preserve their original layout and size

Different page sizes are preserved as-is.

FAQ

PDF merger: common questions

No hard limit. Browser memory is the real constraint — dozens of PDFs work fine, hundreds-of-MB total may slow down. If you hit memory pressure, merge in smaller batches.

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