Turn any photo black and white
A grayscale conversion is a classic look — timeless portraits, clean document scans, minimalist product shots, or simply removing distracting colour. Mynify converts any JPG, PNG or WebP to black and white in your browser, instantly, with nothing uploaded.
Natural-looking, not flat
A naive black-and-white conversion just averages the colour channels, which can make skies and skin look dull. Mynify uses the perceptual luminance formula — weighting green, red and blue the way your eye actually perceives brightness — so contrast and tone stay true to the original. The dimensions and sharpness are untouched; only the colour is removed.
When to use it
- Portraits and photography for a classic monochrome feel.
- Document scans to reduce colour noise and file size before printing.
- Design assets that need to sit in a neutral, single-tone layout.
Tip
Grayscale images often compress smaller than colour ones — follow up with the image compressor if you need a lighter file for the web. Keep your colour original in case you want it back.
Free, unlimited, no signup, no watermark — processed entirely on your device.