PDF Tools
Merge PDF Files Online
Combine multiple PDF documents into a single file — securely and directly in your browser. No uploads, no storage, everything happens on your device.
• Files are processed locally in your browser (no server uploads).
• Best for total merged size up to around 80 MB and a few hundred pages.
• Limits for stability on most devices:
- Max 20 files
- Max 40 MB per file
- Max 80 MB total
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Drop your PDFs here
or click to browse your device. You can add multiple PDF files, reorder them, and then merge into a single document.
Supported: PDF files only. Large files may take longer to process depending on your device.
Selected files (0)
Merged file is ready
Click the button below to download your combined PDF.
How does this Merge PDF tool work?
- All PDFs are loaded and processed directly in your browser using JavaScript.
- Pages from each file are copied into a new combined PDF document (no quality loss).
- The final merged file is offered as a direct download — nothing is uploaded to IDEAONIC servers.
- For very large PDFs, consider splitting them and merging in smaller batches for better performance.