Compress PDF Online – Reduce File Size Free
Shrink your PDF file size without sacrificing quality. Our browser-based compressor re-serialises the PDF, removes redundant objects, and compresses content streams.
Compress PDF is ready in your browser
100% Free & Private — Processing runs locally on your device without server uploads.
About Compress PDF
Shrink your PDF file size without sacrificing quality. Our browser-based compressor re-serialises the PDF, removes redundant objects, and compresses content streams.
Frequently Asked Questions
How much will my PDF be compressed?
Results vary based on your file's composition. PDFs with large metadata, unoptimized fonts, and heavy text see the most dramatic reduction (often up to 80%). Image-heavy PDFs may see less change depending on their initial resolution.
Will the quality be affected?
Text and vector content quality is fully preserved because the tool focuses on structural compression and removing redundant objects, not aggressive image downscaling. Your document remains perfectly readable.
Is my file uploaded to a server?
No, your document is incredibly secure. All compression algorithms run locally in your web browser. Your file never leaves your device and is never transmitted across the internet.
Is this free?
Yes, this PDF compressor is completely free. There are no daily usage limits, no file size caps, and absolutely no registration required to compress your files.