Merge PDFs

How it works

1. 1

   Select your PDFs

   Drag and drop one or more PDFs into the upload area, or click to browse. You can add more files later.

2. 2

   Reorder if needed

   Drag the file tiles into the order you want — top to bottom becomes page 1 to N in the output.

3. 3

   Download the merged file

   Click ‘Merge PDF’. The combined document is built locally and downloaded immediately.

Frequently asked questions

• Are my files uploaded to a server?

  No. Every tool on SnapToolz runs entirely inside your browser using JavaScript and WebAssembly. Your file is read locally, processed in memory, and the result is offered as a download. Nothing is sent to a server — there isn't one to send to.

• Is there a limit on the number or size of PDFs I can merge?

  No artificial limit. The practical ceiling is your device's available memory. On a typical laptop you can merge 50+ files totalling several hundred megabytes without issue.

• Will my bookmarks, links and annotations be preserved?

  Yes — pages are copied verbatim, including annotations and internal links. Document-level metadata (title/author) is taken from the first PDF; you can edit it afterwards with Edit PDF Metadata.

• Can I merge in a custom page order?

  Yes. After dropping files, drag any tile to reorder. If you need fine-grained page-level reordering across files, use Organize PDF instead.

• Does it work offline?

  Yes. SnapToolz is a Progressive Web App. After your first visit, the app is cached on your device and every tool keeps working without an internet connection.

• Is SnapToolz free?

  Yes — every tool is 100% free with no sign-up, no watermark, no hidden tier. The whole platform is open source and we have no plan to gate features.

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