B&W contrast filter simulator
On black-and-white film a coloured filter lightens its own colour and darkens the opposite. Upload a colour photo to preview how each classic filter would render the tones.
A visualisation from your colour image's channels, not a lab-calibrated result — but it shows the classic effect well: red darkens blue skies, green helps skin and leaves. Remember the filter factor costs you exposure.
About this tool
On black-and-white film a coloured filter lightens its own colour and darkens the opposite, which is how photographers control skies and skin tones. Upload a colour photo and choose a filter to preview how yellow, orange, red, green or blue would render the tones.
How to use it
- Upload a colour photo from your device.
- Choose a filter such as red for dramatic skies or green for foliage.
- Compare the black-and-white preview as you switch filters.
- Remember each filter also costs exposure, its filter factor.
FAQ
Is this a lab-accurate conversion?
No. It is a channel-mix visualisation of your colour image that shows the classic effect well, not a calibrated film response.
Is my photo uploaded?
No. The preview is rendered on a canvas in your browser and never leaves your device.