Combine multiple PDF files into a single document instantly in your browser. PDFCharm's free PDF merger preserves all content, pages, and formatting from each file and lets you reorder them by dragging before merging. No file ever leaves your device — everything is processed locally using pdf-lib.
How to merge PDF files online for free
- Click "Add PDF" or drag multiple PDF files onto the upload area.
- Drag the file rows to arrange them in the order you want in the merged document.
- Click "Merge PDFs" to combine them and download the result to your device.
Frequently asked questions
- How many PDFs can I merge at once?
- You can merge as many PDFs as your browser can handle. There is no enforced limit, though very large sets of files may be slower depending on your device.
- Is there a file size limit for merging PDFs?
- There is no server-side limit. All processing happens in your browser so limits depend only on available device memory.
- Will merging PDFs affect their quality?
- No. PDFCharm merges PDFs at the byte level using pdf-lib, preserving all original content, fonts, and image quality.
- Does the tool upload my PDFs to a server?
- No. All merging happens entirely in your browser. Your files are never uploaded anywhere.
- Can I merge password-protected PDFs?
- Password-protected PDFs need to be unlocked before they can be merged. Open them in a PDF viewer and re-save without a password first.
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