压缩图片不损失质量
最高可压缩90%的大小。
上传图片
上传要压缩的图片
压缩结果
可下载的优化图像
上传图片以开始
图像将显示在这里
最佳实践：
- • 支持 JPG 和 PNG
- • 适合100MB以下
- • 保持高质量
立即优化！
采用高级算法无损压缩。
What is 图片压缩器?
图片压缩器 is a free online tool to process your files securely in your browser. Our tool ensures your data remains private while delivering fast results. No installation or registration is required.
该工具利用先进的 Web 技术完全在您的设备上运行。这意味着您的文件绝不会上传到我们的服务器。
Need exact pixel dimensions or percentage scaling? Resize image dimensions with Resize Image →
Need another image format? Convert between JPG, PNG, and WebP →
Want to turn compressed images into a single document? Convert images to PDF document →
Need to edit or apply filters to your photo? Crop, resize, or edit before compressing →
Want a transparent background? Remove image background →
主要特点
可调质量滑块
Fine-tune compression level from 1-100% to balance size and quality
批量处理
Compress multiple images simultaneously for maximum efficiency
JPG, PNG & WebP Support
Works with JPG, PNG, and WebP images.
输出 WebP 格式
Convert to WebP for smaller files than JPG at comparable visual quality.
对比大小预览
See original vs compressed size comparison before downloading
无需上传至服务器
100% 浏览器运行内核 —— 本地运作绝不出埠
工作原理
- 1
上传图片
Click the upload area or drag and drop JPG, PNG, or WebP image files.
- 2
调整质量系数
Use the quality slider to choose your compression level. Lower values = smaller files, higher values = better quality.
- 3
启动执行
Click "Compress" to process your images instantly in your browser.
- 4
保存下存
Download your compressed images individually or as a ZIP archive.
常见应用场景
- ▸优化网站图像以提高 Core Web Vitals 和页面速度
- ▸在上传到社交媒体平台之前缩小图像尺寸
- ▸Compressing product photos for e-commerce stores
- ▸在附加到电子邮件或消息之前缩小图像
- ▸Batch compressing a photography portfolio for web galleries
- ▸减少云驱动器或本地库中的存储使用量
- ▸优化移动应用程序或 PWA 的图像
支持的格式
隐私与安全
您的图像完全在您的浏览器内处理。任何图像数据都不会传输到我们的服务器。 ConvertAllNow 对您的图像文件或其内容的访问权限为零.
💡 实用技巧
- ▸对于 Web 使用，目标质量为 75-85% — 用户看不到差异，但节省的大小是显着的
- ▸Convert to WebP format when possible — it can often provide smaller files than JPG at comparable visual quality.
- ▸For PNG images with transparency, keep PNG format to avoid introducing a white background
- ▸Use batch mode to process entire photo folders at once and save significantly more time
- ▸Compare the before/after preview to fine-tune your quality setting before downloading
常见问题解答
关于 图片压缩器 的常见问题解答。
You can significantly reduce image file sizes while controlling output quality. At 75-85% quality, most images look virtually identical to the original while using far less storage.
The compressor supports JPG, JPEG, PNG, and WebP formats. You can preserve the original format or export as high-efficiency WebP.
No. All compression happens locally in your browser using JavaScript and Canvas APIs. Your images never leave your device.
Yes! Upload multiple images in batch. Each will be compressed with your selected quality settings and downloadable individually or as a ZIP.
Lossy compression (like JPEG) discards imperceptible image data to achieve smaller files. Lossless compression (like PNG) reduces file size without any data loss. Our tool uses adjustable compression with a quality slider.
Not necessarily — you can choose to keep the PNG format with transparency, or convert to JPG or WebP for smaller file sizes.
For web images, a quality of 75-85% is typically ideal. WebP format can provide smaller files than JPG at comparable visual quality.
No server-imposed limit. Processing happens in your browser, so practical limits are set by your device's RAM — typically several hundred megabytes.