Merge PDF
Merge multiple PDF files into one document — AI organize, optimize & premium merge modes
What is Merge PDF?
Merge PDF is a free browser-based PDF tool from Farvixo that lets you merge multiple PDF files into one document — AI organize, optimize & premium merge modes. It runs entirely on your own device using WebAssembly, so the document is never uploaded to a server. There is no sign-up, no watermark on the output and no cap on how many files you process.
How to use Merge PDF
Drag your PDFs into Merge PDF or click to browse. The files stay on your device — nothing is uploaded to a server.
Reorder, select page ranges and pick the output settings you need. Merge PDF shows a live preview so you can check the result before committing to it.
Download the new PDF straight away. No watermark, no page limit and no sign-up — run Merge PDF as often as you need.
Frequently Asked Questions
Is Merge PDF free?
Yes — unlimited merges, all 10 merge modes, AI organize included free.
How many PDFs can I merge?
Unlimited files in one session. Drag to reorder pages, exclude pages, and use AI to detect blanks and duplicates.
What are the merge modes?
Normal, Fast, Lossless, Compressed, PDF/A, Print, Book, PAN Card, Passport, and Certificate — each tuned for different outputs.
Are files uploaded to a server?
No — 100% browser processing. Your PDFs never leave your device.
Can I merge images and ZIP files, not just PDFs?
Yes. Drop in JPG, PNG or other images and they are converted to pages automatically. You can also drop a ZIP and every PDF and image inside it is added, or use the Camera button on your phone to photograph a document straight into the merge.
Will merging reduce the quality of my PDFs?
Not unless you ask it to. Lossless mode copies every page exactly as it was, so the merged file is identical in quality to the originals. Compressed and Print modes trade some quality for a smaller file — pick whichever suits your output.
Does Merge PDF work on mobile?
Yes — it works the same on Android and iPhone as on desktop, including drag-to-reorder. You can also merge straight from your camera, which is handy for combining photographed documents into one PDF.
What you can use Merge PDF for
- Preparing a document for an email attachment or an upload form with a size limit
- Students and office workers who need one PDF change without buying a desktop editor
- Handling contracts, invoices or ID documents that should not be uploaded to a third-party server
- Cleaning up a scanned document before archiving or sharing it
Merge PDF at a glance
- Tool
- Merge PDF — PDF Tools
- Purpose
- Merge multiple PDF files into one document — AI organize, optimize & premium merge modes
- Input
- One or more files (PDF)
- Output
- PDF file (plus the chosen export format where the tool converts)
- Processing
- In your browser — files are never uploaded to a server
- Price
- Free, unlimited, no account required
- Limitations
- Bounded by your device's memory and CPU rather than a server quota; very large files may be slow on older hardware
Tips for better results
- Check the page count and orientation in the preview before you download — reordering afterwards means starting over.
- If a PDF refuses to open, it is usually password-protected; remove the password first, then re-run this tool.
- Very large PDFs are limited by your device memory, not by an upload cap. Splitting a 500-page file into parts is faster than processing it whole.
Common problems and how to fix them
The PDF will not load
The file is encrypted or was produced by a non-standard writer. Open it in a PDF reader, print it back to PDF, and try again.
Text comes out garbled or as boxes
The PDF has no embedded font or no text layer at all. A scanned page needs OCR first — use PDF OCR, then re-run this tool.
The browser tab becomes unresponsive
The document is larger than the available memory. Close other tabs, or split the PDF and process it in sections.
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