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Grayscale WebP Maker

World's Simplest WebP Tool

This free online tool lets you convert a WebP image to grayscale. Just load your WebP image in the input editor, and you'll instantly get a grayscale WebP image in the output editor. In the options, you can choose a grayscale conversion method or create a custom conversion method by adjusting the light intensity of individual RGB color channels. You can also limit the number of colors used in the grayscale spectrum to add retro or vintage effects. Created by team Browserling.

᠎᠎᠎          Tool Options

Conversion Method

Apply the formula for the
average light intensity in
of the red, green, and blue
color channels.
(R/3 + G/3 + B/3)
Apply HDTV (high-definition)
TV formula.
(0.21×R + 0.72×G + 0.07×B)
Apply SDTV (standard-definition)
TV formula.
(0.30×R + 0.59×G + 0.11×B)

Custom Light Intensity

Enable this option to use
a custom intensity formula
for grayscale conversion:
{formula}
Use this much red light.
Use this much green light.
Use this much blue light.

Limit Gray Color Count

Restrict the number of gray
shades in the output grayscale
WebP image.
Specify the number of
shades (1 to 256).

What Is a Grayscale WebP Maker?

With this online tool, you can remove colors from WebP images and convert them to just grayscale tones. If we look behind the scenes, the program removes the color information from the pixels, leaving solely the intensity of light, which defines the amount of gray tones in the WebP. No light means it's a black color, and full light means it's a white color. Converting a WebP to grayscale can often highlight certain details that are less noticeable in color images. Additionally, grayscale colors can be used to create a classic or artistic effects, emphasize texture and contrast, or even save file size as grayscale WebPs require less storage space compared to colorful ones. The tool provides several methods for converting WebP to grayscale. The first method is called "Average Colors Method". This is a simple method that calculates the average light intensity in the red, green, and blue channels for each pixel, resulting in a single grayscale value. This is calculated via the formula: "R/3 + G/3 + B/3". The second method is "Modern Television Method". This method prioritizes the green channel, which corresponds to how the human eye perceives the brightness of greenish objects. It's commonly used in modern (high-definition television) and it has the formula: "0.21×R + 0.72×G + 0.07×B". The third method is called "Older Television". This method uses a more balanced light intensity of all three color channels. It is commonly used for standard-definition television (SDTV) and has the formula: "0.30×R + 0.59×G + 0.11×B". Additionally, the program provides the ability to customize the intensity of each color channel yourself via the "Apply Custom Intensity" checkbox. With this option turned on, you can define the intensity values for each color channel – red, green, and blue. Additionally, you can use the grayscale color limit option. This can further reduce the file size and also create a unique mosaic effect on the WebP image with a limited number of colors. For example, setting the color limit to two will create just black-and-white WebP. Webp-abulous!


Grayscale WebP Maker Examples

Click to try!

Grayscale WebP via Average Light Intensity

In this example, we use the "Average Colors Method" to convert a WebP image of dry maple leaves to grayscale. This method calculates the average light intensity in the red, green, and blue color channels for each pixel, resulting in a balanced grayscale representation that preserves the details of the leaves. (Source: Pexels.)

Required options
These options will be used automatically if you select this example.
Apply the formula for the
average light intensity in
of the red, green, and blue
color channels.
(R/3 + G/3 + B/3)
Enable this option to use
a custom intensity formula
for grayscale conversion:
{formula}
Restrict the number of gray
shades in the output grayscale
WebP image.

Sunflower in Grayscale

This example applies the "Modern TV" grayscale conversion method, which prioritizes the light in the green color channel. This corresponds to how the human eye perceives the brightness of the green color and is commonly used in modern high-definition TVs. The result is a black-and-white WebP photo that naturally conveys the texture and details of a sunflower. (Source: Pexels.)

Required options
These options will be used automatically if you select this example.
Apply HDTV (high-definition)
TV formula.
(0.21×R + 0.72×G + 0.07×B)
Enable this option to use
a custom intensity formula
for grayscale conversion:
{formula}
Restrict the number of gray
shades in the output grayscale
WebP image.

Custom Intensities and Limited Palette

In this example, we generate a creative grayscale WebP picture of a toy car by applying custom light intensities (also called weights) to the red, green, and blue color channels. We use a factor of 0.5 for red, 0.3 for green, and 0.2 for blue. Additionally, we set a color limit of 8, indicating that the program should render the WebP using only 8 shades of gray. As a result, we achieve a neat artistic effect, giving the toy car a sticker-like appearance. (Source: Pexels.)

Required options
These options will be used automatically if you select this example.
Enable this option to use
a custom intensity formula
for grayscale conversion:
{formula}
Use this much red light.
Use this much green light.
Use this much blue light.
Restrict the number of gray
shades in the output grayscale
WebP image.
Specify the number of
shades (1 to 256).

All WebP Tools

Didn't find the tool you were looking for? Let us know what tool we are missing and we'll build it!
Quickly convert a non-transparent WebP to a transparent WebP.
Quickly change one color to another in a WebP image.
Quickly remove the background from a WebP image.
Quickly add a background to a transparent WebP image.
Quickly cut out a rectangular or oval area from a WebP image.
Quickly pixelate an area of a WebP image.
Quickly blur an area of a WebP image.
Quickly sharpen an area of a WebP image.
Quickly convert a full-color WebP image to a grayscale format.
Quickly change the width and height of a WebP image.
Quickly interactively rotate a WebP image by any angle.
Quickly create multiple copies of the same WebP image.
Quickly remove a specific color from a WebP image.
Quickly increase or decrease the quality of a WebP image.
Quickly add a border around a WebP image.
Quickly remove a border surrounding a WebP image.
Quickly invert colors in an area of a WebP image.
Quickly convert printed text into a WebP image.
Quickly add a text label to a WebP image.
Quickly visualize the WebP transparency via an alpha mask.
Quickly extract the alpha channel from a WebP image.
Quickly remove the alpha channel from a WebP image.
Quickly fill the alpha channel in a WebP image.

Coming Soon

These WebP tools are on the way!
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Convert GIF to WebP

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Compare WebP Images

Find the difference between two or more WebP images.

Compress WebP

Reduce the file size of a WebP image.

View WebP Metadata

View the metadata information of a WebP image.

Remove WebP Metadata

Remove all metadata information from a WebP image.

Edit WebP Metadata

Edit the metadata information of a WebP image.

Play WebP

Play WebP animations frame by frame.

WebP Viewer

View WebP images and in your browser.


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