Merging is completely free and takes just a few seconds:

1. Drop your PDF files into the upload zone, or click Click to browse to select them.
2. Each file appears as a thumbnail card showing its first page preview.
3. Drag cards left or right to set the merge order — the number badge shows the final sequence.
4. Click 🔗 Merge PDFs and download your result instantly.

Up to 20 files per single merge operation.

Expected speed by count:

• 2–5 files → instant, under 3 seconds
• 6–10 files → fast, under 10 seconds
• 11–20 files → 15–30 seconds depending on size

Need more than 20? Merge in two batches, then merge the two outputs together.

Per file: 40 MB
Combined total: 50 MB

Tips for oversized files:

• Use our Compress PDF tool first — scanned PDFs can shrink by 50–80%.
• Text-based PDFs (Word exports) are usually small and well within limits.

Yes — after selecting files, simply drag any thumbnail card left or right to change its position. The numbered badge (1, 2, 3…) updates instantly.

You can also remove any file with the ✕ button, or add more files using the ＋ Add more PDFs card.

✓ Secure

• Page previews are generated entirely in your browser — files don't leave your device until you click Merge.
• Uploaded files are deleted immediately from our server after your download is ready.
• We do not store, read, or share your PDF content.
• No account or email address is required.

✓ 100% Free

Merging PDFs on CurePDF is completely free — no hidden charges, no watermarks, no account needed.