Structural optimization removes avoidable overhead
Optimize PDF tool
Compress PDF
Reduce PDF file size while retaining readable content and image quality. No registration required.
Add your file
Drag & drop or select a file
Up to 20 MB per fileStep 2 of 3
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How it works
Use Compress PDF in three steps
- 1
Add your source file
Choose the original document and confirm that it opens correctly.
- 2
Review Compression level
Start with the least aggressive option that meets the delivery limit.
- 3
Verify the downloaded result
Open the finished file and inspect important pages before sharing it.
Designed for dependable results
About Compress PDF
Reduce file size with a quality-first workflow that preserves structure where possible and avoids unnecessary page rasterization.
Quality levels let users balance size and clarity
The source file is not overwritten
Settings explained
Choose the right options
- Compression level
- Start with the least aggressive option that meets the delivery limit.
- Image quality
- Photo-heavy scans produce the largest savings and need the closest review.
- Verification
- Inspect small text, thin lines and representative images after downloading.
Common uses
When this tool helps
- Email attachment limits
- Faster document uploads
- Reducing scan storage
Files are processed for the requested task and scheduled for automatic deletion. Review the privacy policy before uploading sensitive documents.
Troubleshooting
Common problems and practical fixes
The file barely shrinks
It may already be optimized or mostly contain efficient vector content.
Images look blocky
Return to the original and use a gentler level; do not recompress the compressed copy.
The result is larger
Some source PDFs are already highly optimized; keep the smaller original.
Questions
Compress PDF FAQ
Is compression lossless?
Structural cleanup can be lossless, while stronger image recompression can change visual detail.
Will selectable text remain searchable?
Content-preserving optimization should retain text; verify the result.
Can I target an exact size?
Compression cannot guarantee an exact byte size because documents differ.
Should I compress repeatedly?
No. Repeated lossy compression can reduce quality without useful savings.
Learn more