Reduce PDF File Size Online
Shrink and optimize PDF file sizes in-browser using DPI and quality parameters.
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How to use PDF File Size Reducer
- 1
Select and upload a PDF document from your device.
- 2
Choose a compression method: 'Scanned PDF Rasterizer' (stronger compression for image/scanned documents) or 'Metadata Stripping' (100% vector-safe).
- 3
For scanned documents, adjust the target resolution DPI and JPEG quality sliders.
- 4
Click 'Compress PDF' to process the document client-side and download your compressed file.
Capabilities
- Reduces PDF file sizes by up to 90% using browser-native downsampling
- Strips redundant structural metadata for clean lossless saves
- DPI presets (72 DPI for web drafts, 150 DPI for standard reading, 200 DPI for high quality)
- Adjustable image compression scale sliders (20% - 90%)
- Secure client-side canvas extraction safeguarding file contents
This tool operates in a sandbox directly inside your web browser. All parsing, processing, and downloads are rendered locally. Your file size, metadata, and contents never cross the network. It works completely offline.
Frequently Asked Questions
Will this compression affect my text readability?
If you select 'Metadata Stripping', text formatting remains 100% identical. If you choose 'Scanned PDF Rasterizer', vector text is converted to image formatting; we recommend using 150 DPI or higher to keep text sharp.