Compress PDF
Reduce PDF file size online without losing quality. Compress large PDF files entirely in your browser — no upload, no server.
How to Use the Compress PDF
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Upload your PDF
Click the upload area and select the PDF file you want to process.
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Set your options
Configure any available options such as page range, output quality, or merge order.
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Click the Process button
All PDF processing runs entirely in your browser using pdf-lib and PDF.js — no uploads.
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Download the result
Click "Download" to save the output file to your device.
Frequently Asked Questions
No. All PDF processing uses pdf-lib and PDF.js, which run 100% in your browser. Your PDFs never leave your device.
Password-protected (encrypted) PDFs cannot be processed because the browser cannot read their contents without the password. The tool will display a clear error message if this happens.
Processing is limited by your device's available memory. Files up to 50 MB generally work fine on modern devices. For very large PDFs, results may vary.
For Merge and Split operations, the text content is preserved exactly as it was in the original. PDF-to-image conversion produces image files, which are not searchable.
Yes — 100% free, no sign-up, no watermarks.