拖拽图片到此处，或点击选择
支持多文件、文件夹与 ZIP 压缩包
JPGPNGWebPAVIFGIF
参数
关于本工具
「调整对比度/亮度」拯救偏灰、偏暗的随手拍。 全部处理在您的浏览器本地完成，图片绝不会上传到任何服务器，既保护隐私又无需等待网络传输。您可以一次拖入多张图片批量处理，处理完成后一键打包下载 ZIP。界面支持中文与 English 双语切换。
常见问题
我的图片会被上传吗？+
不会。所有处理都在您浏览器本地完成，图片不会离开您的设备，关闭页面后数据自动清除。
支持批量处理吗？+
支持。拖入多张图片或整个文件夹即可一次性处理，结果可打包为 ZIP 下载。
能保存为 JPG 吗？+
可以，处理面板可选输出格式与质量。
About
Adjust Contrast & Brightness Rescue dull or dark snapshots. Everything runs locally in your browser — your images never leave your device, protecting privacy and skipping upload waits. Drop many images at once to batch-process, then download all as a ZIP. The interface switches between 中文 and English.
FAQ
Are my images uploaded?+
No. All processing happens locally in your browser; images never leave your device and clear when you close the page.
Batch supported?+
Yes. Drop many images or a whole folder to process at once; results download as a ZIP.
Save as JPG?+
Yes, choose output format and quality.