How do I convert an image to black and white?

Drag your photo onto the upload zone (or click to browse, or paste with Ctrl+V / Cmd+V); the grayscale result appears instantly. Press Export, choose JPEG, PNG, or WebP, and download. It is completely free and runs entirely in your browser via the Canvas API, so your image is never uploaded.

Are images uploaded to a server?

No. All processing runs entirely in your browser; images never leave your device. This is the core design principle of the tool.

Is converting an image to black and white (grayscale) free?

Yes — removing colour from a photo with the Rec.601 luminance formula is completely free, forever. No account, no sign-up, and no limit on how many images you convert. All processing uses the Canvas API in your browser; your images are never sent to any server. The site is ad-supported.

Does it work offline?

Yes. The tool uses the Canvas API and requires no server connection. Disconnect after loading the page and it still works.

What image formats are supported?

Input: JPEG, PNG, WebP, AVIF (browser-decoded). Output: JPEG, PNG, WebP.

How is this different from the Filters tool?

This is a dedicated single-purpose grayscale page with one click and an instant result. The Filters tool also offers sepia, invert, duotone, and brightness/contrast/saturation sliders if you need more control.

What grayscale formula do you use?

Rec.601 luminance: 0.299·R + 0.587·G + 0.114·B. It weights green most and blue least, matching how the human eye perceives brightness, so the result looks natural rather than washed out.

Image to Grayscale (Black & White)

Grayscale is a free browser-based tool that converts a colour image to black and white using Rec.601 luminance, so each pixel keeps its true perceived brightness. Load a JPEG, PNG, or WebP, see the instant preview, and download — processing happens entirely on your device with no upload and it works offline.

Convert any photo to true grayscale directly in your browser — free, no upload required.

100% Free — Forever. No fees, ever.
Private: files are processed locally in your browser and never sent to a server.
No upload, no account, no sign-up.

How do I convert an image to black and white?: Drag your photo onto the upload zone (or click to browse, or paste with Ctrl+V / Cmd+V); the grayscale result appears instantly. Press Export, choose JPEG, PNG, or WebP, and download. It is completely free and runs entirely in your browser via the Canvas API, so your image is never uploaded.
Are images uploaded to a server?: No. All processing runs entirely in your browser; images never leave your device. This is the core design principle of the tool.
Is converting an image to black and white (grayscale) free?: Yes — removing colour from a photo with the Rec.601 luminance formula is completely free, forever. No account, no sign-up, and no limit on how many images you convert. All processing uses the Canvas API in your browser; your images are never sent to any server. The site is ad-supported.
Does it work offline?: Yes. The tool uses the Canvas API and requires no server connection. Disconnect after loading the page and it still works.
What image formats are supported?: Input: JPEG, PNG, WebP, AVIF (browser-decoded). Output: JPEG, PNG, WebP.
How is this different from the Filters tool?: This is a dedicated single-purpose grayscale page with one click and an instant result. The Filters tool also offers sepia, invert, duotone, and brightness/contrast/saturation sliders if you need more control.
What grayscale formula do you use?: Rec.601 luminance: 0.299·R + 0.587·G + 0.114·B. It weights green most and blue least, matching how the human eye perceives brightness, so the result looks natural rather than washed out.

The Rec.601 luminance formula (0.299R + 0.587G + 0.114B) weights colours by human brightness perception, which is why it looks better than a plain (R+G+B)/3 average.
A grayscale image still uses three RGB channels on screen, but every pixel has R = G = B, so it can compress smaller than a colour original.
Converting to grayscale is lossy for colour — the original hues cannot be recovered from the black-and-white result.
The Canvas API getImageData/putImageData methods used here are specified by the W3C HTML Living Standard and supported in all modern browsers.
Client-side processing eliminates network round-trips, so converting in the browser is typically far faster than uploading to a cloud service.

🌑 Image to Grayscale (Black & White)

Image to Grayscale (Black & White)