Why Does My Compressed PDF Look Blurry?
Direct answer
The visible page probably contains raster images that were downsampled or saved at lower JPEG quality. Scanned text, screenshots, and thin lines can blur along with photographs.
Why this happens
Downsampling reduces pixel dimensions. JPEG compression then approximates blocks of image data, which can soften high-contrast edges and introduce ringing around letters.
Blur is more noticeable at high zoom, on high-density displays, and in print. A page that looked acceptable in a small browser preview may not meet the recipient's use case.
Repeated compression makes the problem worse because removed detail cannot be reconstructed from the output.
Recover quality
- Return to the untouched original rather than recompressing the blurry output.
- Use Less mode or a higher-quality source scan.
- Check whether the page is a scan even if it contains OCR text.
- Keep a separate high-resolution master for print and archive use.
What BytesPDF does
BytesPDF's Extreme mode intentionally prioritizes size and can soften images. Recommended is the normal starting point; Less retains more detail.
Related answers and guides
Related privacy-sensitive scenarios
Scenario guides with destination checks for the document you are preparing.
Test your PDF locally
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