How to convert a JPG to black and white
To convert a JPG to black and white, add your photo, pick grayscale for a smooth tonal range or high-contrast for a punchier look, adjust brightness and contrast to taste, and export the monochrome JPEG. The conversion runs in your browser, so your image stays on your device.
Grayscale keeps the full range of gray tones for a natural photographic look, while high-contrast pushes tones toward black and white for a bolder or more document-like result. The brightness and contrast controls let you dial in exactly how strong the effect is before downloading.
When to use grayscale vs high contrast
Use grayscale when you want a classic black-and-white photo that keeps soft gradients and detail, such as portraits and scenery. It preserves the tonal range so the image still feels like a photograph.
Use high-contrast when you want a sharper, more graphic result, for example cleaning up a document photo, creating bold artwork, or making text and lines stand out. The high-contrast mode produces a harsher black-and-white than normal grayscale.
Is the converter free and private?
Yes. The JPG to black and white converter is free with no sign-up, no watermark, and no usage limits.
It is private because the conversion and export happen locally in your browser. Your JPG is never uploaded to a server, so it stays on your device.