Edit, sign, merge, split and compress PDFs privately in your browser.

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Merge PDF Files Online

Combine several PDF files into one clean document. Attach your PDFs, arrange the order, and download the merged file directly from your browser.

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Drag and drop your PDF here, or tap to attach.

Private PDF tools for everyday documents

FlowPDF helps you handle common PDF tasks with privacy first. Your files are processed inside your browser, so you can edit, sign, merge, split, compress and convert PDFs without uploading them to a third party server.

Frequently asked questions

Can I edit a PDF online for free?

Yes. Attach your PDF and use FlowPDF to add text, signatures, highlights, whiteout, shapes and simple annotations.

How do I merge PDF files?

Choose Merge PDFs, attach your files, arrange the order and download the combined PDF.

Can I compress a PDF?

Yes. FlowPDF can reduce the size of image heavy PDFs directly in your browser.

Do I need to install anything?

No installation is needed. FlowPDF runs in your web browser.

Are my PDFs uploaded to a server?

No. FlowPDF is designed to process files in your browser, so your documents do not need to be uploaded to a third party server.

Is FlowPDF safer for private documents?

FlowPDF reduces security concerns by keeping PDF processing local in your browser instead of sending files to an external server.

✅ Done

Your PDF is ready.

Delete selected item?

This will remove the selected signature, stamp, text, tick, or cross from the PDF.

Open Full Screen Editor?

Your PDF is ready. Full Screen Editor gives you more space for text, tick, cross, shapes and signatures.

Tip: On mobile, FlowPDF switches to Quick Edit with large buttons and a simpler toolbar.

Merge PDF Files Online FAQ

How do I merge PDFs?

Attach two or more PDF files, arrange them in the order you want, then choose Merge PDF.

Can I reorder files before merging?

Yes. FlowPDF lets you move files up or down before creating the final PDF.

Are merged PDFs uploaded?

FlowPDF is designed to merge files locally in your browser.