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Compress PDF
Attempts to optimize a PDF's size right in your browser.
Processing happens in your browser; we do not upload your file.
ActivePDFFree
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Embeddable code: coming soon
Coming soon: this section will be available when the tool moves to its next phase.
API: coming soon
An endpoint to use this tool from your backend; not available yet. Meanwhile, the Embeddable code runs in your browser with no server.
About this tool
Compress PDF tries to shrink one or more PDFs by rewriting their internal structure, showing the real result per file.
How to use
- Upload one or more PDFs.
- Check original size, final size, and the delta per file.
- Optional: edit the output file name.
- Download the result: a PDF if there's one, or a ZIP for several.
Use cases
- Trim a PDF to attach it to an email.
- Prep a document for sites with upload size limits.
- Optimize PDFs generated by other tools.
Limits
- Each file is up to 50 MB and the batch up to 100 MB total.
- The reduction depends on the content: an already-optimized PDF or one full of images may shrink little or not at all. In that case we keep the original.
Privacy
Optimization is just an attempt; it doesn't recompress images or guarantee shrinkage. The result depends on the PDF's structure.
Common errors
- An encrypted PDF can't be compressed from this tool.
- Some PDFs with unusual structures may not be compatible.
Technical notes
- Uses pdf-lib to optimize the file structure; it doesn't recompress images.
- That's why the reduction is honest and, for already-light documents, can be minimal.
Related tools
Technical details
- ID
- compress-pdf
- Slug
- /en/tools/compress-pdf
- Backend
- Not required
- AI
- Not required
- API
- Planned