Compress PDF
Reduce file size with local structural optimization and rebuild.
Category: Convert
Processing: On-device
Quota bucket: Heavy
Open interactive tool: /tools/compress
How to use Compress PDF
- Choose one PDF and run compression once.
- Review size delta in the result report.
- Open output and check chart/text fidelity.
- If still too large, remove unnecessary pages and recompress.
- Retain both original and compressed versions until approved.
Tips
- Compression gains vary by source quality and embedded objects.
- For scanned docs, splitting sections can improve practical sharing size.
- Validate legibility before client delivery.
Privacy: Your files never leave your browser. All processing runs on-device.
Full privacy model
Frequently asked questions
What does Compress PDF change?
It rebuilds structure and object streams to reduce file size where possible.
Is Compress PDF private by default?
Compression is handled locally within the browser process.
What does Compress PDF not protect?
It does not guarantee a target size or preserve every embedded feature.
Limitations
- Compression may be minimal on already optimized files.
- It is not a substitute for OCR cleanup on image-heavy scans.