PDF Merger

Combine multiple PDFs in a specified order · Processed locally · Private

Privacy & Security · Free & Unlimited · Fast & Efficient · Free Reordering

Drag and drop PDF files here or click the button below to select files · multiple selection supported

Only .pdf format is supported · All processing is done locally; files are never uploaded to any server

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Drag and drop files or click the area above to select

About PDF Merging

How to Use

  • Click the upload area or drag PDF files into the dashed box to add multiple files at once.
  • Reorder files by dragging the handle on the left of each item, or use the up/down buttons.
  • Click the "Merge PDF" button to combine all files in the current order, right in your browser.
  • When done, click "Download Merged File" to save the result, named "merged_YYYYMMDD_HHmm.pdf".

FAQ

Are files uploaded to a server?

No. This tool uses pdf-lib to perform all PDF merging locally in your browser. Files are never uploaded to any server, fully protecting your privacy.

Are there file count or size limits?

There are no hard limits. However, due to browser memory constraints, it is recommended to keep the total size under 500 MB and the file count under 100 for best performance.

What about the quality of the merged PDF?

Merging is lossless—every page of the original PDFs is preserved completely, including text, images, vector graphics, and form fields.

Are encrypted PDFs supported?

PDFs with owner-password (permission restrictions) can be read. If a PDF has a user open password, you must remove it before merging.

Can I change the merge order?

Yes. Simply drag file items in the list to reorder them freely. The list order is the final page order.