Black and white filter in Photoshop

Photoshop does not have a single button called “black and white filter.” It gives you three different ways to strip color from a photo, and each one trades control for speed differently.

The Black & White adjustment layer is the right default for almost everyone: it is non-destructive, editable at any point, and lets you brighten or darken specific colors instead of flattening them all the same way.

Use the Black & White Adjustment Layer

This is the method most photographers reach for because it stays editable and gives per-color control.

1. Select the layer you want to convert in the Layers panel.
2. Go to Layer > New Adjustment Layer > Black & White, or click the half-circle Adjustments icon at the bottom of the Layers panel and choose Black & White.
3. Name the layer and click OK. Photoshop applies a default channel mix instantly.
4. In the Properties panel, open the Preset dropdown to try built-in looks, or click Auto to let Photoshop balance the mix based on the image’s actual colors.
5. Drag the individual color sliders (Reds, Yellows, Greens, Cyans, Blues, Magentas) to lighten or darken whatever occupied that color in the original photo. Pulling Reds right, for example, brightens skin tones without touching the sky.
6. Check Tint if you want a subtle sepia or cool cast layered over the grayscale result instead of pure neutral gray.

Because this lives on its own layer, you can hide it, delete it, or readjust the sliders at any point without touching the original pixels underneath.

Apply Black & White as a Direct Adjustment

Image > Adjustments > Black & White opens the same sliders and presets, but applies the change straight to the pixels on that layer instead of creating a separate adjustment layer.

It is faster when you only need one quick conversion and don’t plan to revisit the edit. On a Smart Object, this method applies as an editable Smart Filter instead, which keeps some of the flexibility back.

Use this when you want speed and don’t need to blend the black-and-white result with color layers underneath.

Convert with Hue/Saturation

The fastest method, with the least control: add a Hue/Saturation adjustment layer and drag Saturation all the way to -100.

Every color drops to its lightness value with no per-channel weighting, so tonal separation tends to look flatter and less deliberate than the Black & White adjustment. Reds and greens that looked distinct in color can land at nearly the same gray.

It works fine for a fast draft or preview, but it’s rarely the final method a photographer keeps.

Compare the Three Methods

Method	Control level	Destructive?	Best for
Black & White adjustment layer	High - per-color sliders, Tint, Auto	No	Final edits, portraits, anything you’ll revisit
Image > Adjustments > Black & White	High, same sliders	Yes (unless on a Smart Object)	One-off conversions, no further layering
Hue/Saturation at -100	None - flat desaturation	No, if on an adjustment layer	Fast drafts, quick previews

For the full map of tools and guides, open the black and white photography hub.

Fix a Greyed-Out Black and White Filter

If Black & White is unavailable in the Adjustments menu, the document is almost always in the wrong color mode.

Adjustment layers, including Black & White, only work in RGB or Lab mode. Check Image > Mode - if it’s set to Bitmap, Indexed Color, or Multichannel, convert back to RGB Color first and the option returns.

If the layer itself is locked or a Background layer with restrictions, that can also block a new adjustment layer from being added above it. Unlock the layer or duplicate it before applying the adjustment.

When You Don’t Need Photoshop Open

The adjustment layer method gives you the most control Photoshop has to offer, but that control comes with a learning curve and a program that has to be open and licensed.

For a quick conversion - a still for a post, a proof to send a client, a look you want to check before committing to the full Photoshop workflow - Black and White Filter applies Rec. 709 luminosity grayscale in the browser with High Key, Balanced, and Low Key presets, then exports a watermark-free PNG.

It won’t replace per-channel color weighting for a print-grade edit, but it skips the menu digging entirely when the sliders above are more control than the moment calls for.

For a faithful gray plate, open the grayscale photo filter. Compare approaches in online B&W filter vs Photoshop / Lightroom.

Common Questions

Why is the Black and White adjustment greyed out in Photoshop?

The document is usually in a non-RGB color mode. Switch back to RGB Color under Image > Mode and the adjustment becomes available again.

Is the Black & White adjustment layer the same as desaturating?

No. Desaturation (Hue/Saturation at -100) drops every color to the same lightness formula. The Black & White adjustment weighs each color channel separately, so you can lighten or darken specific colors independently - closer to how a physical yellow or red camera filter reshapes tone on black-and-white film.

Can I preview a black-and-white version before editing in Photoshop?

Yes - either toggle a Black & White adjustment layer’s visibility on and off at the top of the layer stack, or run the photo through a quick browser converter first to judge the look before opening Photoshop at all.