PDF Tools
Compress PDF Online
Reduce your PDF file size directly in your browser by optimising pages and images. No uploads, no storage — everything happens on your device.
• Files are processed locally in your browser (no server uploads).
• Best for PDFs up to around 40 MB and a few hundred pages.
• Limits for stability on most devices:
- Max 40 MB per file
- Max 400 pages
Drop your PDF here
or click to browse your device. We’ll create a compressed copy of your PDF — your original file is not changed.
Supported: single PDF file, up to ~40 MB. Larger files may be slow depending on your device.
Selected file
Compression level
Note: for compression, each page is re-rendered as an optimised image inside a new PDF. This keeps layout but can reduce text sharpness at very strong levels.
Compressed file is ready
How does this Compress PDF tool work?
- Your PDF is loaded directly in your browser (no upload to IDEAONIC servers).
- Each page is re-rendered as an optimised image inside a new PDF, based on your chosen compression level.
- The final compressed file is offered as a direct download — your original file remains unchanged on your device.
- Stronger compression gives a smaller file size but may slightly reduce sharpness, especially on scanned images.