调整颜色

微调 PDF 的亮度、对比度、饱和度等。

点击选择文件 或将文件拖放到此处

单个 PDF 文件

您的文件从未离开您的设备。

使用方法

1

Upload File

Click or drag and drop your PDF file to begin

2

Adjust Colors

Fine-tune color settings with real-time preview

3

Download

Save your color-adjusted PDF instantly

相关 PDF 工具

PDF to Greyscale

Free online greyscale tool

Invert Colors

Free online invert colors tool

Scanner Effect

Make PDFs look scanned

Background Color

Change PDF background

Text Color

Change PDF text color

常见问题

Is adjust colors really free?

Yes! PDFBay is 100% free with no hidden fees, no signup required, and unlimited file processing.

Are my files private and secure?

Absolutely! All processing happens in your browser. Your files never leave your device, ensuring complete privacy.

Is there a file size limit?

No! Process files of any size, as many times as you want, completely free.