Guide5 min read
Why PDF Form Fields Break After Merging
Merged a PDF and the form fields vanished or share one value? Here's the real cause — duplicate field names — and how to merge PDFs safely.
Merge PDF
Combine multiple PDF files into one document. Drag to reorder, then download. Free, instant, nothing uploaded.
Drop PDFs here, click to browse, or paste
Add two or more PDFs — up to 100 MB each
✓Free forever
✓Runs locally
✓No account
✓No watermark
Everything you need to combine PDFs
100% private — nothing uploaded
All merging happens locally in your browser using pdf-lib. Your PDFs are never sent to any server.
Drag to reorder
Set the exact order your files should appear in the final PDF by dragging the thumbnail cards.
Unlimited files
Combine as many PDFs as you need in one pass — no per-merge or per-day limits.
Instant merging
No waiting for uploads or server processing. Files combine in seconds, even for dozens of documents.
Lossless output
Pages are copied directly from your source PDFs — text, images, and vector graphics stay exactly as they were.
Works with any PDF
Scanned documents, exported reports, forms, and image-based PDFs all merge correctly.
Three steps to your merged PDF
- 1
Upload your PDFs
Drag and drop two or more PDF files onto the page, or click to browse. Add as many as you need.
- 2
Arrange the order
Drag the file cards to set the order pages should appear in the final document. The number badge on each card shows its position.
- 3
Merge and download
Click Merge — your browser combines every PDF into a single file instantly. Download it directly, nothing is uploaded.
Built for anyone who works with PDFs
Whether you're combining invoices, submitting a multi-part report, or bundling scanned pages into one file — PixelTools merges your PDFs in seconds, free, with no upload.
Business documents
Combine invoices, contracts, and reports into a single file before sending or archiving.
Legal & compliance
Merge signed pages, exhibits, and appendices into one complete document for filing.
Students & researchers
Combine chapters, scanned notes, or multiple papers into a single PDF for submission or reading.
Expense reports
Bundle scanned receipts and statements into one PDF for expense claims or bookkeeping.
Frequently asked questions
Is this PDF merger free?
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Yes, completely free with no limits on how many PDFs you combine or how often you use it. No account, no watermark.
Are my PDFs uploaded to a server?
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No. Merging happens entirely in your browser using pdf-lib. Your files never leave your device — there's no server upload and nothing is stored.
How many PDFs can I merge at once?
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There's no fixed limit — add as many files as you need. Very large batches may take a few extra seconds to process depending on your device.
Can I change the order of the merged pages?
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Yes. Drag any file's thumbnail to reorder it before merging. Each PDF's own internal page order is kept intact.
Will merging affect the quality of my PDFs?
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No. Pages are copied directly from the source files, preserving the original text, vector graphics, images, and fonts exactly.
Can I remove a file after adding it?
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Yes. Hover over any file card and click the X to remove it from the merge before combining.
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Merge your PDFs now
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