Black & White Converter

Turn color photographs into rich, gallery-grade monochrome — and decide exactly how light the skin and how dark the sky go, with full channel mixing.

Private by design — your photo is processed locally and never uploaded.

Drop a photo here, or click to browse

Supported formats: JPG, PNG, WebP, GIF, BMP

Before After

Drag to compare

Tip: upload the largest scan you have — bigger input gives better results.

How It Works

A black-and-white photograph is not just a faded color photo: it is one brightness channel rebuilt from three. This tool measures the red, green and blue value of every pixel, then mixes them into a single gray level — and you choose the recipe, with live preview. Everything runs on your own device through the HTML5 Canvas API; your photo is never uploaded, stored or seen by anyone.

What the channel sliders do:

Channel mixing

Each slider controls how much that color contributes to the final gray. The defaults (30 / 59 / 11) reproduce the classic luminance curve human eyes are most sensitive to — green. Raise a channel to make everything of that hue lighter; lower it to push it darker.

Weights normalize automatically

The numbers are relative proportions, not absolute brightness. The engine renormalizes them to 100% behind the scenes, so you can push Red to 80 without crushing the rest of the image to black.

Portraits: lift the Red slider

Skin is warm — rich in red. Raising the Red channel lightens skin and soft freckles into luminous grays, the way soft portrait films render a face.

Landscapes: push Green and Blue

Green foliage separates beautifully when the Green weight is high, and a higher Blue weight turns pale skies into deep dramatic grays with clean clouds — the Ansel Adams look.

One-click classic preset

The "Classic B&W" button restores the industry-standard channel balance in a single click, before you start experimenting.

Fully local & private

No upload, no account, no watermark. Convert as many photos as you like, even after you go offline.

An honest note: this is a mathematical channel-mix filter applied to the pixels you already have. It cannot recover texture or detail that was never captured, and it does not add film grain, halation or a film contrast curve on its own — pair it with the Old Movie Effect or Vignette tool when you want that vintage character.

How to Use

Upload a color photoDrag the photo into the drop zone or click to browse. JPG, PNG, WebP, GIF and BMP are supported — a high-resolution scan converts to much richer grays.
Start from the classic presetClick "Classic B&W" to get the standard 30 / 59 / 11 channel balance as a neutral starting point.
Mix the channels for your subjectFor portraits, raise Red to lighten skin; for landscapes, raise Green for foliage and Blue to darken the sky. Watch the before/after slider as you go.
Download your monochromeExport as PNG for archiving, JPG for sharing, or WebP for the smallest file.

FAQ

Why does my sky turn into flat gray?

Pale blue skies mix to near-gray with the default balance. Raise the Blue channel weight — blues turn darker in the result, which separates the sky from white clouds and restores that dramatic black-and-white landscape look.

Why does skin look too dark or muddy?

Skin is rich in red. Raise the Red channel to lighten faces and freckles into luminous grays. If you pushed Blue high for the sky, lower it again so skin does not turn murky.

What do the 30 / 59 / 11 numbers actually mean?

They are the relative weights of the red, green and blue channels in the luminance mix — the same proportions as the classic Rec. 601 television standard. The tool renormalizes them automatically, so changing one slider never leaves your photo half-black.

Can this add film grain or contrast to my black and white?

No. This tool only converts color to a single gray channel. For vintage film character, try the Old Movie Effect (grain + sepia + vignette) or the Vignette Effect after converting to black and white.

Is my photo uploaded to a server?

No. Everything runs locally in your browser with the Canvas API. Your photo never leaves your device — you can even disconnect from the internet after the page loads.

Is it really free and unlimited?

Yes — free, unlimited, no watermark, no sign-up. We keep all tools free and support the site with ads and an optional Pro tier later.