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Hình ảnh đen trắng

Convert any colour photo to black and white online for free — with an adjustable intensity slider for a subtle desaturation or a full grayscale, all in your browser.

Kích thước tệp tối đa 10 MB. Đăng ký để biết thêm.

How To Convert An Image To Black And White Online For Free

Tải hình ảnh của bạn lên

Drag and drop an image or click to browse. Supports PNG, JPG, WebP, and BMP.

Adjust Intensity

Drag the Intensity slider — 100% for full black and white, or lower to keep some colour.

Tải xuống

Choose PNG, JPG, or WebP and download the result at full resolution.

100% Free

No fees, no watermark, no sign-up required.

Private

Runs in your browser — images never leave your device.

Full Resolution

Exports keep your image’s original dimensions.

Any Device

Works on desktop, tablet, and mobile browsers.

Câu hỏi thường gặp

How do I make an image black and white?

Upload your image and drag the Intensity slider — 100% is full black and white, while lower values keep some colour for a faded, muted look. Click Download to save.

What is the difference between black and white and grayscale?

In everyday use they mean the same thing: a grayscale image maps every colour to a shade of grey between black and white. True 1-bit 'black and white' (only pure black or pure white) is different, but this tool produces the grayscale look most people want.

Can I keep a little colour instead of full grayscale?

Yes. Set the Intensity slider below 100% to partially desaturate the image, keeping a hint of the original colour for a vintage or muted effect.

Does converting to black and white reduce quality?

No. Only the colour of each pixel changes; resolution and detail are preserved. PNG export is lossless.

Are my images uploaded anywhere?

No. The conversion happens locally in your browser via the Canvas API — your images never leave your device.

What formats are supported?

Upload PNG, JPG, JPEG, WebP, or BMP, and export as PNG, JPG, or WebP.

Công cụ liên quan

Khám phá thêm các công cụ miễn phí trên iFormat.io

Lật ảnh

Mirror an image horizontally or vertically in one click.
Xoay hình ảnh

Rotate a photo by 90°, 180°, or any custom angle.
Làm mờ hình ảnh

Add an adjustable blur to a whole photo or export a soft background.
Máy nén hình ảnh

Shrink image file size while keeping quality.
Trình chỉnh sửa hình ảnh

Resize images to custom or social-media dimensions.
Cắt ảnh

Crop to any ratio or exact pixel dimensions.