Files never leave your browser
PDF灰度转换
Convert your color PDF to black and white
Drop your PDF here
or click to browse
Converting...0%
Free to start
Works offline
No upload required
Convert your color PDF to black and white
Drop your PDF here
or click to browse
Choose a PDF from your device
Colors are removed from every page
Save your finished PDF
Your files never leave your device. No uploads, no servers, no tracking.
No upload wait times. Processing starts instantly on your device.
Everything processes locally. Your files never touch our servers.
Save ink when printing, meet submission requirements, or create a consistent monochrome look.
It can slightly. For maximum compression, use our Compress tool afterward.
Yes. Text is re-rendered at high resolution preserving full readability.