Black & White Filter
Convert photos to black and white using luminosity, average, or desaturate.
100% client-side · no upload
Load a file to begin.
How to use
- Drop your image onto the file picker or tap to select from your device.
- Select a conversion algorithm — luminosity is recommended for portraits and landscapes.
- Choose output format and quality, then click Convert B&W and download.
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Frequently Asked Questions
- What is the difference between the three algorithms?
- Luminosity: 21% red + 72% green + 7% blue — matches human perception. Average: equal 33% each — simpler, flatter. Desaturate: (max + min channel) / 2 — HSL lightness, different tonal rendering.
- Which algorithm is best for portraits?
- Luminosity produces the most natural portrait tones — skin renders at a pleasing mid-grey. Average can produce flatter results for high-key portraits.
- Is colour information recoverable after conversion?
- No. Colour is permanently lost in the output file. Keep your original if you might want the colour version later.
- Is my image uploaded to a server?
- No. Conversion uses Canvas pixel manipulation entirely in your browser. Nothing is sent to any server.
Last updated: By jarvisbox