How is this different from just desaturating?

Desaturation applies one fixed formula, so colors of similar brightness end up as the same gray and the tonal separation is lost. Channel mixing lets you darken a red shirt or deepen the sky, which keeps the image looking three-dimensional.

Do I need an account? Is it paid?

Neither. Free, no sign-up, no usage cap, and no watermark.

Is my photo uploaded?

No. The conversion runs entirely in your own browser — we never receive the file.

Can I get the color back afterwards?

On this page, Ctrl+Z steps back. But a downloaded black-and-white image carries no color information — recoloring it means generating new colors with AI colorize, and those will not match the original exactly.

Color to black and white · keep the tonal separation

Channel mixing, not a one-click desaturate. Local processing, nothing uploaded.

Use it online now

Drop in a color photo, pick a preset, and it is converted — then fine-tune each color slider if you want.

The problem with plain desaturation is that two colors of similar brightness turn into the same gray, and the image goes flat. The right approach is to mix the source colors individually — red, yellow, green, cyan, blue and magenta each get a weight that decides how dark they render. Want a darker sky or brighter skin? Adjust that one channel. Everything is computed in your own browser; the photo is never uploaded.

Key features

Per-channel mixing

Six source colors, each with its own weight, so similar colors stay distinct.

Start from a preset

High contrast, red filter and others are ready to use — or keep tweaking from there.

Runs locally

The photo is never uploaded. Close the tab and nothing is left.

Undo anytime

Went too far? Ctrl+Z steps back. Experiment freely until you download.

How to use

1
Add a photo

Drag it into the box, or press Ctrl+V to paste.
2
Pick a preset

Start from whichever preset is closest — much faster than dialling in from zero.
3
Adjust the channels

Drag the slider for each color so the right areas go light or dark.
4
Download

Save it, or open the full editor to keep working.

FAQ

How is this different from just desaturating?: Desaturation applies one fixed formula, so colors of similar brightness end up as the same gray and the tonal separation is lost. Channel mixing lets you darken a red shirt or deepen the sky, which keeps the image looking three-dimensional.
Do I need an account? Is it paid?: Neither. Free, no sign-up, no usage cap, and no watermark.
Is my photo uploaded?: No. The conversion runs entirely in your own browser — we never receive the file.
Can I get the color back afterwards?: On this page, Ctrl+Z steps back. But a downloaded black-and-white image carries no color information — recoloring it means generating new colors with AI colorize, and those will not match the original exactly.

Try Color to black and white · keep the tonal separation now

Runs fully in your browser · no install · no signup · images never uploaded

Use it online now