Reduce WebP file size online for free — transparency preserved, quality preserved.
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WebP is already efficient, so aggressive compression has limited benefit. The best results come from lowering the quality from 100% to 80-85% — usually 30-60% smaller with no visible difference on screens.
WebP is one of the most efficient image formats — 25-35% smaller than JPG at the same quality. But WebP files saved at 100% quality still have room for compression. Lowering the quality to 80-85% typically reduces file size by 30-60% with no visible difference on modern screens. This matters for websites optimizing Core Web Vitals, CDNs reducing bandwidth costs, and forms with strict upload limits.
| Input format | WebP (lossy or lossless) |
| Output format | WebP |
| Quality range | 60% (max compression) to 90% (near-original) |
| Typical reduction | 30-60% at 80% quality |
| Transparency | Preserved |
| Encoder | libwebp |
| Max file size | 50 MB per file |
| File retention | Auto-deleted after compression |
The compressor decodes the WebP image and re-encodes it using libwebp at a lower quality setting. Quality 85% is typically visually indistinguishable from 100% while being 30-50% smaller. Transparency is preserved, and no visible artifacts appear at 85% quality.
WebP at 80-85% quality is visually indistinguishable from 100% on modern screens. Below 70% quality, artifacts start showing in detailed areas. Because WebP is already efficient, the compression percentages are lower than for JPG or PNG — 30-60% reduction is typical.
| Level | Size reduction | Best for |
|---|---|---|
| Low (90% quality) | ~15-25% | High-quality assets |
| Medium (80% quality) | ~40-50% | Web, social media |
| High (70% quality) | ~55-65% | Email attachments |
| Maximum (60% quality) | ~65-70% | Strict size limits |
Last reviewed: 2026-10-01
