How many PDFs can I merge at once?

There is no fixed limit on the number of PDFs you can merge. In practice, merging very large files may be slow since all processing happens in your browser. For best results, keep individual files under 50 MB each.

Will the merged PDF lose any formatting or images?

No. Signvert merges PDFs at the binary level using pdf-lib, which preserves all pages exactly as they appear in the originals, including images, fonts, and layout.

Are my PDFs uploaded to a server?

No. All merging happens locally in your browser. Your files are never transmitted to any server and are discarded as soon as you close or refresh the tab.

mergeFree · No account · 100% browser

Merge PDF Files

Combine multiple PDF files into a single document. Drag to reorder, then download — all in your browser.

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Drop PDF files here

or click to browse · multiple files supported

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Drag to Reorder

Arrange files in any order before merging.

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100% Private

Your files never leave your browser. No server.

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Any Number of Files

Combine two or dozens of PDFs into one.

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How it works

Signvert's merge PDF files free tool lets you combine any number of PDF documents into a single file directly in your browser, with no uploads and no account required. Add your PDFs, drag them into the order you want, then click Merge — the tool joins them page by page and delivers a single downloadable PDF in seconds. Because everything runs locally using pdf-lib, your documents never leave your device and the merged output preserves the original formatting of each file.

Merge PDF Files

How it works

Frequently asked questions

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