Best Image Compression Settings — A Complete Reference
The 'right' compression setting doesn't exist in isolation — it depends on where the image is going and what it will be used for. A web thumbnail can be compressed aggressively; a print-ready product image cannot. This guide gives you concrete quality settings and target file sizes for every major use case so you stop guessing and start compressing correctly.
Quick Answer
The 'right' compression setting doesn't exist in isolation — it depends on where the image is going and what it will be used for. A web thumbnail can be compressed aggressively; a print-ready product image cannot.
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Step-by-Step Guide
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Web content images (blog, landing pages)
Format: WebP or JPG. Quality: 80%. Target size: under 150 KB for content images, under 300 KB for hero images. Resize to max display width × 2 for retina.
E-commerce product images
Format: WebP with JPG fallback. Quality: 85%. Target: 100–300 KB. Dimensions: 1000–2000px square. Higher quality preserves product detail that drives purchase decisions.
Social media uploads
Format: JPG (platforms re-compress anyway). Quality: 85–90% (social platforms apply their own compression on top). Size: match the platform's recommended dimensions exactly to avoid double-scaling.
Email attachments
Format: JPG. Quality: 75–80%. Target: under 500 KB per image. Resize to 1600px wide maximum. Total attachment under 10 MB for compatibility.
Print and archiving
Format: PNG (lossless) or JPG at 95%+ quality. No aggressive compression — preserve maximum detail. File size is not a concern; quality is. Archive the original before any compression.
Before vs After Compression
Typical result on a 1080×1080px product photo
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Pro tip
Use 75–85% quality for web images — you get 60–80% smaller files with no visible difference at normal screen sizes.
Format & File Size Comparison
Same 1080×1080px photo processed four ways
| Format | Quality | File Size | Notes |
|---|---|---|---|
| PNG (original) | Perfect | 4.2 MB | No compression — too large for web |
| Compressed PNG | Visually identical | 1.1 MB | −74% — transparency preserved |
| JPG (85% quality) | Excellent | 310 KB | −93% · Best for photos |
| WebP (85%)BEST | Excellent | 205 KB | −95% · Recommended for web |
Based on a 1080×1080px photo. Results vary by image content and complexity.
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Frequently Asked Questions
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