Upload one PDF
Choose a PDF up to 100 MB from your device.
Compress PDF
Reduce PDF file size with a quality-preserving recommended mode or stronger compression for image-heavy documents.
Your file is sent securely to OneTools for compression.
01
How it works
Choose compression
Use Recommended to preserve quality or Smaller File for stronger image compression.
Download the result
Review the original and compressed sizes, then download the compressed PDF.
02
Why use OneTools
Two practical modes
Choose between quality-preserving optimization and stronger image compression.
Clear size summary
See original size, compressed size and space saved when compression applies.
Secure processing
The protected server connection processes the file without exposing the API key.
03
Popular use cases
- Reduce a PDF before emailing it
- Make reports easier to share
- Shrink image-heavy scanned documents
- Prepare a PDF for an upload limit
04
Frequently asked questions
Which compression mode should I choose?
Start with Recommended. Use Smaller File when reducing size matters more than preserving image detail.
What if my PDF is already optimized?
The result explains when no smaller version can be created without increasing file size.
Is the compression API key sent to my browser?
No. The browser sends the PDF to OneTools, and the protected backend request happens server-to-server.
What is the maximum file size?
You can submit one PDF up to 100 MB.
05
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