How do you know if compression is too aggressive? Rune's before/after preview shows exactly what you'll get before downloading.
What the Preview Shows
Visual Comparison
- Original image on one side
- Compressed version on other side
- See actual quality difference
File Size Information
- Original size (e.g., 2.5 MB)
- Compressed size (e.g., 250 KB)
- Reduction percentage (e.g., 90%)
How to Use Preview
- Upload image to Rune's Image Compressor.
- Set compression settings.
- View preview with comparison.
- Adjust settings if needed.
- When satisfied, download.
What to Look For
Acceptable Quality
- Details remain clear
- Colors look accurate
- No obvious blur
Signs of Over-Compression
- Blocky artifacts (especially around edges)
- Color banding (gradients look stepped)
- Significant blur
- Loss of fine details
Adjusting Based on Preview
| Observation | Action |
|---|---|
| Looks perfect, small size | Maybe increase quality |
| Visible artifacts | Decrease compression (raise quality) |
| File too large | Increase compression (lower quality) |
| Good balance | Download! |
Iterative Approach
- Start at 80% quality.
- Check preview.
- If quality is fine, try 70%.
- Keep adjusting until you find the balance.
Pro Tips
- Zoom in on detailed areas
- Check areas with gradients
- Look at text and edges
- Compare file sizes
Conclusion
Preview before committing to compression. Rune's Image Compressor shows you exactly what you'll get.