Compress PDF to 500KB
A balanced compression that keeps your PDF under 500KB while maintaining good visual quality. Images are optimized to 100 DPI at 50% quality — a sweet spot between file size and appearance. This preset works great for reports, presentations, and documents you want to share via email or cloud storage without losing too much image clarity.
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100% private — processed locally in your browser
How to Compress PDF to 500KB
- 1
Upload your PDF — it never leaves your device
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Compression targets 500KB — adjust the quality slider for more control
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Download the optimized PDF
FAQ
Will charts and diagrams still look good?▾
Yes. At 50% image quality and 100 DPI, charts, diagrams, and screenshots remain clear and readable. Vector graphics like charts created in Excel or PowerPoint are not affected by image compression at all — only raster images (photos, screenshots) are optimized.
What's the difference between 500KB and 1MB compression?▾
The 500KB preset uses more aggressive image optimization (50% quality, 100 DPI) compared to the 1MB preset (60% quality, 150 DPI). Choose 500KB for smaller files, or 1MB if you need better image fidelity in your document.
Is my file uploaded to a server?▾
No. PDFlys processes everything directly in your browser using WebAssembly technology. Your PDF never leaves your device, making it completely private and secure. There's no file upload, no server processing, and no data collection.