🔄 图像格式转换器
Convert between popular image formats instantly. JPG, PNG, WebP, GIF, BMP, and TIFF supported.
图片格式转换器：即时转换图片格式
图片格式转换器让你即时转换图片格式。全部在浏览器本地处理，无需上传、无需注册。
将 PNG 转 JPG 以减小体积
将 PNG 转 JPG 以减小体积。这是人们使用图片格式转换器最常见的理由之一——几秒内即可在浏览器中完成。
把 JPG 转 WebP 提升现代网页性能
把 JPG 转 WebP 提升现代网页性能。这是人们使用图片格式转换器最常见的理由之一——几秒内即可在浏览器中完成。
批量转换 HEIC 照片以便跨平台分享
批量转换 HEIC 照片以便跨平台分享。这是人们使用图片格式转换器最常见的理由之一——几秒内即可在浏览器中完成。
图片格式转换器所需的一切功能
让图片格式转换器快速、私密且免费的强大功能。
即时转换
文件上传瞬间即在浏览器内处理——无需排队等待。
100% 隐私
文件从不离开你的设备，全部本地运行。
可调质量
精细调节压缩或输出设置，平衡体积与画质。
批量处理
一次处理多个文件并一起下载。
永久免费
无需注册、无水印、无隐藏限制。
跨平台
Windows、Mac、Linux、iOS、Android 任意现代浏览器可用。
How to Use
Upload Image
Select the image you want to convert.
Choose Format
Pick the output format from the dropdown.
Convert & Download
Click Convert and save your new file.
Detailed User Guide
Step 1: Upload Your Image
Upload any image in JPG, PNG, WebP, GIF, BMP, or TIFF format. The preview will show your original image.
Step 2: Choose Output Format
Select the target format from the dropdown. Here's a quick guide to help you choose:
- PNG — Best for images needing transparency; lossless quality
- JPG — Best for photographs; smaller file sizes, no transparency
- WebP — Modern format, 25-35% smaller than JPG with transparency support
- GIF — For simple animations or very small images with limited colors
- BMP — Uncompressed, very large files; rarely needed today
Step 3: Convert & Download
Click "Convert" and the tool will process your image. The converted file size is displayed. Click "Download" to save with the appropriate file extension.
Common Conversion Scenarios
- PNG → JPG — Reduce file size for web photos that don't need transparency
- JPG → PNG — Add transparency (note: transparent areas will be filled with white first)
- Any → WebP — Optimize for modern websites with best compression
- BMP/ TIFF → PNG — Convert legacy formats to web-friendly PNG
Pro Tips
- WebP is supported by all modern browsers and is the best all-around choice for web
- PNG to JPG conversion can reduce file size by 50-80% for photographic images
- When converting animated GIFs, only the first frame is preserved (use a dedicated GIF tool for animations)
- The output quality is set to 92% for lossy formats — a good balance of quality and size