True black and white reduces an image to just two tones — solid black and solid white — for a bold, high-contrast result that suits line art, signatures, and stylised photos. A threshold control lets you decide where the cut-off falls.
Before
B&WThe conversion runs in your browser, so you can fine-tune the look without uploading anything.
How to use Convert Image to Black and White
Using Convert Image to Black and White takes only a few seconds and just four simple steps — no sign-up, no software, and nothing to learn:
- Upload an image: Add the photo or drawing you want in black and white.
- Adjust the threshold: Slide the control to set how much becomes black versus white.
- Preview live: The result updates as you move the slider.
- Download: Save your two-tone black-and-white image.
What you can do with Convert Image to Black and White
Convert Image to Black and White is built to do one job well, and gives you everything you need to get it exactly right:
Adjustable threshold. Control the balance between black and white to taste.
Live preview. See changes instantly as you tune the cut-off.
Great for line work. Ideal for signatures, sketches, and high-contrast art.
Free and private. Everything stays in your browser.
Bold, two-tone results
Unlike grayscale, pure black and white removes every shade in between for a graphic, high-impact look. The adjustable threshold means you can keep delicate details or push for stark contrast, all without leaving the page.
Whether you need it once or every day, Convert Image to Black and White keeps the process quick and predictable. Because it focuses on a single task, there are no crowded menus to wade through — you open the page, set what you need, and get your result. That simplicity is exactly why a dedicated image tool beats a heavyweight editor for a job like this.
Everything runs in your browser
Unlike most online tools, Convert Image to Black and White never uploads your image to a server. The moment you choose a file, it is processed right here in your web browser using your own device's power. Nothing is sent over the internet, nothing is stored, and nothing is shared with anyone.
That gives you two real advantages. First, it is private: sensitive documents, ID photos and personal files never leave your computer or phone. Second, it is fast — there is no slow upload or download round-trip, so even large files are handled almost instantly. And it is completely free, with no watermark added to your result and no account required.
Tips for the best results
- Start from the highest-quality original you have — the better the input, the better the result from Convert Image to Black and White.
- Check the exact requirement — size, dimensions, or format — before you begin, so you only need to do it once.
- Adjustable threshold: Control the balance between black and white to taste.
- Live preview: See changes instantly as you tune the cut-off.
- Everything is repeatable — if the result isn't quite right, just adjust the settings and run it again. Nothing is uploaded, so you can try as many times as you like.
Frequently asked questions
How is this different from grayscale?
Grayscale keeps many shades of gray. This tool converts to only black and white, with a threshold deciding which pixels go each way.
What does the threshold do?
It sets the brightness cut-off: pixels brighter than the threshold turn white, darker ones turn black. Adjust it to capture more or less detail.
Is it good for signatures?
Yes — it cleans up a scanned signature into crisp black strokes on a white field.
Is Convert Image to Black and White free to use?
Yes — Convert Image to Black and White is completely free. There is no account to create, no subscription, and no watermark added to your result. Use it as many times as you need.
Do I need to install anything?
No. Convert Image to Black and White runs entirely in your web browser on any modern device — Windows, Mac, Android or iPhone. There is nothing to download or install.
Ready to start? Scroll back to the top, drop your image into Convert Image to Black and White, and download the finished file in seconds — free, private, and right inside your browser.