Merge PDF Files Online — Free, No Upload

Drag and drop multiple PDFs to combine them into a single file — entirely in your browser.

How It Works

  1. 1Upload your file by dragging it into the drop zone or clicking to browse.
  2. 2Adjust the quality slider to balance file size and visual fidelity (optional).
  3. 3Click Download to save your converted file.

About Merge PDF

Need to combine multiple PDFs into one document? This tool lets you drag and drop PDF files, reorder them, and merge them into a single PDF. You can see the page count for each file before merging. Everything runs locally in your browser using pdf-lib — no files are uploaded to any server.

Frequently Asked Questions

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

There is no hard limit. The tool processes everything in your browser, so the practical limit depends on your device's memory. Merging dozens of average-sized PDFs should work fine.

Is my file uploaded to a server?

No. Transmute processes everything locally in your browser using JavaScript and the Canvas API. Your files never leave your device — there is no server, no upload, no cloud processing.

Will the merged PDF keep bookmarks and links?

Yes. The merge operation copies pages as-is, preserving internal links, annotations, and other page-level features.

Can I reorder the files before merging?

Yes. Drag and drop the files in the list to set the order before you click merge.

Related Tools

Split PDF

Split a PDF by selecting pages or entering page ranges. Free, browser-based.

Rotate PDF

Rotate PDF pages by 90°, 180°, or 270°. Select individual pages or rotate all. Free, browser-based.

Reorder PDF Pages

Drag and drop to reorder pages in a PDF. Free, browser-based.

Compress PDF

Reduce PDF file size by removing metadata and optimizing structure. Free, browser-based.