PDF Compressor

Popular

Quality preset

Balanced and Aggressive modes flatten pages to compressed images for maximum size reduction. Text will not be selectable in the output PDF. Use High quality to preserve text.

Drop a PDF or click to upload

PDF · up to 50 MB

Files are processed locally — they never leave your browser.

About PDF Compressor

PDF Compressor reduces the file size of PDF documents by re-encoding embedded images and removing redundant data. Compressed PDFs upload faster, consume less storage, and comply with email attachment size limits. Compression level is adjustable — choose between minimal quality loss for print-quality output or aggressive compression for email-optimised files.

How it Works

1Upload your PDF file.
2Select the compression level: Low (minimal quality loss), Medium (balanced), or High (smallest file).
3The tool re-encodes images at reduced quality and removes metadata and redundant objects.
4Download the compressed PDF and compare the file size reduction.

Frequently Asked Questions

How much can I expect my PDF to shrink?

Results vary significantly by content. PDFs that are mostly text compress very little (10–20%) because text is already compact. PDFs with large embedded images or scanned pages can shrink by 50–80% at high compression. The tool shows the size reduction after processing.

Does compression reduce text quality?

Text and vector content are not re-encoded and retain full quality. Only raster images (photographs, scanned pages) are affected by the quality setting. At 'Low' compression, image quality change is barely perceptible. At 'High', images become noticeably softer — suitable for email but not print.

Can I compress a PDF that is already quite small?

Yes, but with diminishing returns. Already-optimised PDFs may only shrink by a few percent. The tool will still process the file and report the final size, so you can see if further compression is worthwhile.

Will compression remove passwords or DRM from a PDF?

No. Compressed output retains the same encryption and permissions as the original. If the input PDF is password-protected, the output will also be password-protected.

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