How it works

1. 1

   Upload multiple PDF files — they stay entirely in your browser.

2. 2

   Drag and drop to reorder them in your preferred sequence.

3. 3

   Click Merge & Download to get a single combined PDF instantly.

Why choose FlowTools

• Merge unlimited PDFs with zero file size restrictions.
• No sign-ups, no email collection, no spam.
• Drag-to-reorder makes organizing documents effortless.

Frequently Asked Questions

How many PDFs can I merge at once?

You can merge as many PDFs as your browser can handle. There's no hard limit on our end.

Are my files uploaded to a server?

No. All merging happens client-side in your browser memory. Your files never leave your device.

Will the formatting stay intact?

Yes. FlowTools preserves all original formatting, fonts, and layout from your source PDFs.

Can I rearrange pages within a PDF?

Currently you can reorder entire PDFs. For page-level reordering, use our Split PDF tool first.