點擊或拖拽添加圖片
支援 PNG、JPG、JPEG、WEBP、GIF、AVIF、BMP、ICO、HEIC、JXL、TIFF，單張須小於 20MB，單次最多 10 張
Free online image compressor supporting 11 formats (JPG/PNG/WEBP/GIF/AVIF/HEIC etc). 3 compression levels, batch processing, real-time ratio. Files auto-delete after 2 hours.
Depends on level. Recommended (quality 75) is nearly indistinguishable to the naked eye for web/email/social use while reducing size by 40-70%. Use Light (quality 90) for maximum quality retention.
11 formats: JPG/JPEG, PNG, WEBP, GIF, AVIF, BMP, ICO, HEIC, JXL, TIFF — including Apple HEIC photos and next-gen AVIF. Max 20MB per file.
Yes, batch-add multiple images to queue. Each compresses independently with its own ratio displayed. Ideal for e-commerce product images, blog assets, and social media content.
Images upload via encrypted channel to the compression server. Files are automatically deleted 2 hours after processing and are not retained or used for any other purpose. Download promptly after completion.
If output format is flexible, WEBP and AVIF offer the best compression — 25-35% smaller than JPG at equivalent quality. If keeping the original format, Recommended mode works best on JPG.
Rarely, re-compressing an already highly compressed image can slightly increase size. If the source is already a low-quality JPG (quality < 50), use Light mode. Negative ratio means no gain — you can download the original instead.
No. Compression only reduces data size (quality parameter), not pixel dimensions (width/height). To also reduce dimensions, use the Image Resize tool.
Image ResizeImage compression reduces file size via algorithms, divided into lossy and lossless types. Lossy compression (JPG, WEBP, AVIF) discards data the human eye is less sensitive to (mainly high-frequency chroma information) for dramatic size reduction; lossless compression (PNG) optimizes encoding without losing any pixel data but achieves smaller savings.
**Why image compression matters**: Unoptimized images often account for 50%+ of total page weight. Google Core Web Vitals LCP (Largest Contentful Paint) is directly affected by image loading speed — compressing images significantly improves load times and SEO rankings. For email attachments, form uploads, and social media, compression avoids exceeding file size limits.
**Choosing a compression level**: Recommended (quality 75) is the sweet spot for most scenarios — 40-70% size reduction with visually imperceptible quality loss. Extreme (quality 20) is for avatars/thumbnails where size is critical. Light (quality 90) is for product photos/photography requiring maximum quality.
**Format recommendations**: If the target platform supports it, convert to WEBP or AVIF — these modern formats are 25-50% smaller than JPG at equivalent quality, and support transparency and animation. This tool also provides image format conversion.
This tool supports **11 major image formats** (JPG/JPEG/PNG/WEBP/GIF/AVIF/BMP/ICO/HEIC/JXL/TIFF) including iPhone HEIC photos and next-gen AVIF, max 20MB per file, with batch processing and per-image ratio display. Images upload to the server for compression and are **automatically deleted after 2 hours**.
| Level | Quality | Typical Savings | Visual Quality | Best For |
|---|---|---|---|---|
| Extreme | 20 | 70-90% | Lower, may show artifacts | Avatars, thumbnails, size-critical scenarios |
| Recommended | 75 | 40-70% | High, virtually indistinguishable | Web images, email attachments, social media (recommended) |
| Light | 90 | 10-30% | Highest, visually lossless | Product photos, photography requiring max quality |
| Format | Compression | Best Use | Transparency | Animation |
|---|---|---|---|---|
JPG/JPEG | Lossy | Photos, realistic images | ❌ | ❌ |
PNG | Lossless | Icons, screenshots, text images, transparency needed | ✅ | ❌ |
WEBP | Lossy/Lossless | Web images (25-35% smaller than JPG/PNG) | ✅ | ✅ |
AVIF | Lossy/Lossless | Next-gen format (smaller than WEBP) | ✅ | ✅ |
GIF | Lossless (256 colors) | Simple animations | ✅ (1-bit) | ✅ |
HEIC/HEIF | Lossy | Apple device photos | ✅ | ❌ |
