Why Is My JPG Blurry After Saving?
A JPG gets blurry because JPG uses lossy compression: every time the file is saved, the format throws away some image data to make the file smaller. At a high quality setting the loss is invisible, but as the quality drops, JPG discards more and more detail, and that missing information shows up as softness and blocky artifacts, most noticeably around sharp edges and text.
JPG blur is almost always caused by that lossy compression, and it has three distinct triggers: saving at too low a quality, re-saving the same JPG many times so the loss compounds, or using JPG for content like text and screenshots that it handles badly. Once you know which one is hitting your image, the fix is straightforward and usually means changing one setting before you save.
The Three Causes of JPG Blur
| Cause | What happens | Fix |
|---|---|---|
| Low quality setting | Saving below ~60% discards too much data, creating soft, blocky areas | Save at 80-90% quality |
| Repeated re-saving | Every open-edit-save cycle compresses again, compounding the loss | Keep a lossless master; export JPG once at the end |
| Wrong format for the content | Text and sharp graphics smear under JPG's compression | Use PNG for text, screenshots, and line art |
Why JPG Loses Detail
JPG compresses by grouping the image into 8x8 pixel blocks and discarding the high-frequency detail the eye is least likely to notice. At high quality this is invisible. As you lower the quality, JPG throws away more of that detail, and the missing information shows up as softness and blocky artifacts, most visibly around sharp edges and text. Crucially, the discarded data cannot be recovered: each save is a one-way loss, which is why re-saving the same JPG repeatedly makes it progressively worse.
How to Save a JPG That Stays Sharp
- Edit from a lossless master (PNG, TIFF, or your camera's RAW) and export to JPG only as the final step.
- Set quality to 80-90%. This is visually indistinguishable from 100% but produces a much smaller file.
- Do not re-edit the exported JPG. Go back to the master if you need changes, then export a fresh JPG.
- For screenshots, UI, and text, save PNG instead. JPG is the wrong tool for hard-edged content.
Convert or Compress Cleanly in the Browser
To move between formats without an extra lossy step, convert images online, and when you need a smaller JPG that still looks sharp, compress it with a controlled quality setting rather than re-saving in an editor. Both run in your browser, so the image never leaves your device. Note that no tool can truly un-blur a JPG that was already saved at low quality; the lost detail is gone, so the real fix is always to save it correctly the first time.
Detailed Answer
Why does my JPG look blurry?
JPG uses lossy compression that discards image data each time you save. At low quality settings (below 60%), visible blurring and artifacts appear, especially around edges and fine details.
How do I save JPG without quality loss?
Save JPG at 85-100% quality in your image editor. Avoid saving the same JPG multiple times as quality degrades with each save.
Should I use PNG instead of JPG to avoid blurring?
PNG is lossless and does not degrade, but files are larger. Use PNG for graphics and screenshots. Use JPG at high quality (85%+) for photographs.
What JPG quality setting should I use?
Use 85% for web images (good balance of quality and file size). Use 95-100% for images you plan to edit further. Use 100% only when maximum quality is essential.
Can I recover quality from a blurry JPG?
No, JPG compression permanently discards image data. The original quality cannot be recovered once lost. Always keep original high-quality files.
Does converting JPG to PNG make it sharp again?
No. PNG is lossless, so it preserves whatever you give it, but it cannot restore detail JPG already discarded. Converting a blurry JPG to PNG just freezes the blur in a larger file. The fix is to re-export from a lossless original, not to change the blurry file's format.
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