图片工具
压缩、调整大小、裁剪、旋转和转换图片
上传图片
拖放图片到此处或点击选择
PNG、JPEG、WebP、GIF、BMP
支持批量上传。裁剪仅应用于单文件模式。
建议下一步
相关工具
使用方法
上传您的文件
拖放文件或点击浏览。您的文件留在浏览器中。
调整设置
配置选项以获得您所需的精确结果。
下载结果
即时处理并下载您的文件——无需等待，无需上传至服务器。
为什么使用此工具
100% 免费
没有隐藏费用，没有付费等级——所有功能完全免费。
无需安装
完全在浏览器中运行。无需下载或安装任何软件。
隐私且安全
您的数据永远不会离开您的设备。不会上传至任何服务器。
支持移动设备
完全响应式设计——在手机、平板或桌面电脑上均可使用。
您的文件保持私密
此工具完全在您的浏览器中处理文件。不会上传至任何服务器——您的数据永远不会离开您的设备。
- 无服务器上传——100% 客户端处理
- 不存储数据——关闭标签页时文件即被丢弃
- 无需账号——无需注册即可立即使用
How to Compress Images: Reduce File Size While Keeping Quality
Key Points
- Image compression reduces file size by 50-90% with minimal visible quality loss
- JPEG quality 80-85% provides the optimal balance between size and visual clarity
- Smaller images mean faster website loading, better SEO, and lower bandwidth costs
Large images slow down websites, consume storage, and make sharing difficult. Image compression reduces file size by removing unnecessary data while preserving visual quality. For web use, a well-compressed image loads faster, improves user experience, and boosts search engine rankings.
70%
Average size reduction at quality 80%
Common Use Cases
Website Performance Optimization
Compress product images, hero banners, and blog photos to reduce page load time. Google recommends images under 100 KB for optimal web performance.
Email & Messaging
Reduce image size before attaching to emails or sending via messaging apps to stay within size limits and save recipients' bandwidth.
Social Media Uploads
Pre-compress images before uploading to avoid double-compression by platforms like Instagram and Facebook, which can degrade quality.
Cloud Storage Savings
Compress photo libraries before backing up to cloud storage to save space and reduce sync times—especially valuable for limited free storage plans.
Compression Tips
For photos, JPEG at 80% quality is the sweet spot—barely visible difference but significant size reduction.
For screenshots and graphics with text, use PNG compression to keep text sharp and readable.
Compare before and after side by side—if you can't see a difference, the compression level is perfect.
Always keep original uncompressed files as masters—compress copies for distribution.
All image compression happens locally in your browser using the Canvas API. No images are uploaded to any server, ensuring complete privacy of your photos.