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
Drop your image here
or click to browse
JPG PNG WebP
Preview

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.

Advertisement

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.
Buy me a coffee