Free Black and White Image Converter
Convert any photo to black and white in your browser. Choose from 8 conversion methods — grayscale, high contrast, luminosity, sepia and more — then export as JPG, PNG, WebP or AVIF. No upload, no signup.
Images never leave your browser
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8 Conversion Methods
Standard Grayscale
Classic luma-weighted conversion — the natural, familiar black and white look.
High Contrast B&W
Stark black and white with a hard threshold — no grays, just pure black or white pixels.
Luminosity
Rec.709 luminance formula for a film-like, cinema-grade black and white.
Average RGB
Simple averaging of the red, green, and blue channels.
Red / Green / Blue Channel
Extract a single color channel as the grayscale value — useful for creative effects.
Sepia Tone
Warm vintage brown tones instead of pure gray, for an aged photograph look.
Frequently Asked Questions
- What is the difference between the conversion methods?
- Standard Grayscale uses the classic luma formula for natural results. Luminosity uses the Rec.709 formula for a film-like look. High Contrast produces stark black and white with no grays. Average RGB simply averages the three color channels. Red/Green/Blue Channel isolate one color channel. Sepia Tone adds warm vintage brown tones.
- Is my image uploaded to a server?
- No. All conversion happens entirely in your browser using the Canvas API. Your image never leaves your device.
- What output formats are supported?
- JPG, PNG, WebP, and AVIF. PNG is lossless; JPG, WebP, and AVIF use lossy compression for smaller file sizes. AVIF support depends on your browser.
- Does the downloaded image have a watermark?
- No watermark, ever. The downloaded image is clean and ready to use.