Compress WebP Online
Reduce WebP file size online for free — transparency preserved, quality preserved.
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How to compress WEBP
- Upload one or more WebP files (up to 50 MB total).
- Choose a compression level (Low, Medium, High, or Maximum).
- Click 'Compress WebP' — finishes in under 2 seconds per image.
- Download compressed files individually, or grab all as a ZIP.
Quick fact about WEBP
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.
Why compress WEBP?
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.
Technical details
| 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 |
How the conversion works
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.
When to compress WEBP
- Reducing WebP image weight for Core Web Vitals.
- Meeting upload size limits (e.g. 100 KB) on web forms.
- Optimizing WebP assets for CDN delivery.
- Reducing bandwidth costs for WebP-heavy sites.
- Preparing WebP images for email attachments.
- Shrinking WebP files for mobile delivery.
- Preparing WebP assets for marketplaces with size limits.
Quality considerations
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.
Limitations and caveats
- WebP is already efficient — compression gain is smaller than for JPG/PNG.
- Below 70% quality, visible artifacts may appear.
- Repeated re-compression accumulates quality loss.
- Animated WebP is compressed using the first frame only.
- Very small WebP files (under 10 KB) may not benefit.
Compatibility
- Output WebP opens in every browser since 2020.
- Supported by WordPress 5.8+, Shopify, Squarespace, Wix, Ghost.
- Native import in Photoshop 23+, GIMP 2.10+, Affinity, Figma.
- Ideal for web delivery via CDN.
- Works with every modern CMS, marketplace, and upload form.
Tips for best results
- 80% quality is the sweet spot for WebP — 40-50% smaller with no visible difference.
- Keep the original if the image is a critical asset.
- WebP compresses less than JPG/PNG because it's already efficient.
- Batch-compress up to 50 MB at once.
- For photos, consider converting WebP to JPG first, then compressing.
Compression levels explained
| 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 |
Common problems and fixes
- WebP is barely smaller after compression
- WebP is already efficient — savings are typically 30-60%, lower than for JPG. Try 'Maximum' level or use a target-size preset.
- WebP looks slightly blurry after compression
- The compression level was too aggressive. Use 80-85% quality instead. Below 70%, visible artifacts appear.
- Animated WebP is no longer animated
- Our compressor uses only the first frame. For animated WebP, use a dedicated animation tool.
Frequently asked questions
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Sources and references
Last reviewed: 2026-10-01