Compress PDF
Reduce PDF file size locally where possible and download an optimized copy.
Drop files here or click to browse
Batch processing is supported where the browser can safely handle it.
Compressed PDF
Preview, file size, and downloads appear here after processing.
Your output will appear here
Run the tool to see previews, file sizes and download actions.
About Compress PDF
Compress PDF is built for the specific pdf file to compressed pdf workflow, not a generic upload page. Use it for upload limits, email attachments, portals, forms, and document packets that need a smaller PDF.
Processing happens locally in your browser where the selected format is supported, so files do not need to be uploaded for the normal workflow. The tool shows file details, output status, download actions, and practical warnings when a browser cannot safely decode or encode a format such as HEIC, TIFF, AVIF, or encrypted PDF.
Best practice: check the exported PDF before sharing, because scanned PDFs and already optimized files may not shrink much in the browser.
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Frequently Asked Questions
The tool rewrites the PDF structure locally with pdf-lib. It does not upload your document to a compression service.