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PDF Quality Optimizer

Find the optimal balance between file size and visual quality. The tool shows a preview of compression results at different settings so you can choose the best tradeoff before downloading.

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How to Use PDF Quality Optimizer
  1. 1Upload the PDF you want to optimise
  2. 2Adjust the quality sliders: DPI and JPEG quality percentage
  3. 3The preview updates live to show visual quality at each setting
  4. 4Note the estimated output file size for each setting combination
  5. 5Click 'Download Optimised PDF' when satisfied with the quality/size tradeoff
Examples
  • Find the smallest file size that still keeps contract text legible before sending to court
  • Preview quality at different compression levels before sending a photo portfolio PDF
  • Compare 150 DPI vs 72 DPI output of a scanned document before choosing a compression level
  • Check quality tradeoffs before reducing a product catalogue PDF for web use
Frequently Asked Questions

The Quality Optimizer shows a side-by-side or slider preview of the compressed output before you commit to downloading. You can adjust quality settings and see the resulting file size and visual quality instantly.

Image DPI (dots per inch), JPEG quality percentage, and compression level for text/vector streams. Each parameter shows its impact on estimated file size as you move the slider.

150 DPI and 80% JPEG quality is a good default — most documents are clear for screen and email use at these settings. Adjust down if you need a smaller file.

Yes. The preview panel shows the original and compressed version so you can evaluate quality visually before deciding.

No. The preview is a rendering estimate. The final downloaded file is processed fresh with your chosen settings at full fidelity.

Yes. All processing — including the preview rendering — runs in your browser. Your PDF is never uploaded to any server.

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