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WebP Alpha Mask Maker

World's Simplest WebP Tool

This free online tool lets you create a WebP alpha mask. Just load your WebP image in the input editor, and you'll instantly get an alpha mask in the output editor. In the options, you can customize the colors of the alpha mask and individually set them for the transparent, semi-transparent, and opaque pixels. Additionally, for semi-transparent pixels, you can preserve their original transparency levels in the mask. Created by team Browserling.

WebP Alpha Mask Maker

World's Simplest WebP Tool

This free online tool lets you create a WebP alpha mask. Just load your WebP image in the input editor, and you'll instantly get an alpha mask in the output editor. In the options, you can customize the colors of the alpha mask and individually set them for the transparent, semi-transparent, and opaque pixels. Additionally, for semi-transparent pixels, you can preserve their original transparency levels in the mask. Created by team Browserling.

᠎᠎᠎          Tool Options

Transparent Pixels

Define the color of
completely transparent
areas (alpha = 0).

Partially Transparent Pixels

Define the color for partially
transparent areas (alpha
between 0 and 1).
Use this option to keep the
original alpha values for
partially transparent pixels.

Opaque Pixels

Define the color for
completely opaque
areas (alpha 1).

Alpha Mask Info

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What Is a WebP Alpha Mask Maker?

With this online tool, you can visualize the alpha channel of WebP images and generate their alpha masks. An alpha mask allows you to classify pixels by their level of transparency, dividing them into three categories: transparent pixels (alpha channel equals 0), semi-transparent pixels (alpha channel is between 0 and 1), and opaque pixels (alpha channel equals 1). The tool colors each category of pixels in different colors. By default, it creates the classic alpha mask with just two colors – transparent pixels are shown in black, and semi-transparent and opaque pixels are shown in white. However, in the tool options, you can change the colors for each category. Additionally, for semi-transparent pixels, you can activate a special mode where the pixels preserve their actual level of transparency, retaining the original alpha values. Drawing semi-transparent pixels in a different color is especially useful for visualizing anti-aliased edges of objects. Visualizing all three categories of pixels in three different colors creates an extended alpha mask. Besides the alpha mask, the tool also displays a status badge in the output editor. The badge quickly summarizes the composition of pixels and tells you which three of the pixel categories are there in the WebP (transparent, semi-transparent, and/or opaque). In the tool options, you can also find information about the exact pixel count of each of the three categories (transparent, semi-transparent, and opaque). Webp-abulous!

What Is a WebP Alpha Mask Maker?

With this online tool, you can visualize the alpha channel of WebP images and generate their alpha masks. An alpha mask allows you to classify pixels by their level of transparency, dividing them into three categories: transparent pixels (alpha channel equals 0), semi-transparent pixels (alpha channel is between 0 and 1), and opaque pixels (alpha channel equals 1). The tool colors each category of pixels in different colors. By default, it creates the classic alpha mask with just two colors – transparent pixels are shown in black, and semi-transparent and opaque pixels are shown in white. However, in the tool options, you can change the colors for each category. Additionally, for semi-transparent pixels, you can activate a special mode where the pixels preserve their actual level of transparency, retaining the original alpha values. Drawing semi-transparent pixels in a different color is especially useful for visualizing anti-aliased edges of objects. Visualizing all three categories of pixels in three different colors creates an extended alpha mask. Besides the alpha mask, the tool also displays a status badge in the output editor. The badge quickly summarizes the composition of pixels and tells you which three of the pixel categories are there in the WebP (transparent, semi-transparent, and/or opaque). In the tool options, you can also find information about the exact pixel count of each of the three categories (transparent, semi-transparent, and opaque). Webp-abulous!


WebP Alpha Mask Maker Examples

Click to try!
click me

Alpha Mask of a Bird

In this example, we create an alpha mask of a WebP sticker of a Mexican eagle. In the mask, the transparent pixels are displayed in black color, semi-transparent pixels are displayed in dark orange color, and opaque pixels are displayed in white color. This mask effectively highlights the transparent background and the opaque pixels of the bird. The semi-transparent pixel visualization at the edges of the feathers allows us to investigate the transition of transparent pixels into opaque pixels and check the depth of anti-aliased edges. (Source: Pexels.)

Required options
These options will be used automatically if you select this example.
Define the color of
completely transparent
areas (alpha = 0).
Define the color for partially
transparent areas (alpha
between 0 and 1).
Use this option to keep the
original alpha values for
partially transparent pixels.
Define the color for
completely opaque
areas (alpha 1).
click me

Alpha Mask of a Basketball

This example generates an alpha mask of a WebP image of a Willson basketball. It uses tomato color (#fa6441) for transparent pixels, orange (#febb00) for semi-transparent pixels, and steel-blue (#365d97) for opaque pixels. The semi-transparent areas are drawn with their actual alpha channel values, demonstrating how the transparency gradually changes along a linear gradient from top to bottom. (Source: Pexels.)

Required options
These options will be used automatically if you select this example.
Define the color of
completely transparent
areas (alpha = 0).
Define the color for partially
transparent areas (alpha
between 0 and 1).
Use this option to keep the
original alpha values for
partially transparent pixels.
Define the color for
completely opaque
areas (alpha 1).
click me

Alpha Mask of the Eiffel Tower

In this example, we use our alpha mask generator to examine the intricate shape and structure of the Eiffel Tower. We use powder blue and pale turquoise to display opaque and transparent areas and distinctly highlight the thin line of semi-transparent pixels around the edges of the tower in black. This mask visualizes the see-through spots of the metallic structure of the tower. (Source: Pexels.)

Required options
These options will be used automatically if you select this example.
Define the color of
completely transparent
areas (alpha = 0).
Define the color for partially
transparent areas (alpha
between 0 and 1).
Use this option to keep the
original alpha values for
partially transparent pixels.
Define the color for
completely opaque
areas (alpha 1).

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 fill transparent areas in a WebP image with a specific color.
Quickly change one color to another in a WebP image.
Quickly make a part of a WebP image semi-transparent.
Quickly add a background to a transparent WebP image.
Quickly remove the background from a WebP image.
Quickly remove the green or blue screen from a WebP image.
Quickly add a border around a WebP image.
Quickly remove a border surrounding a 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 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 convert a full-color WebP image to a grayscale format.
Quickly convert a colorful WebP to a black and white WebP.
Quickly invert colors in an area of a WebP image.
Quickly decrease the color count in a WebP image.
Quickly increase or decrease the quality of a WebP image.
Quickly optimize the file size and quality of a WebP image.
Quickly compress a WebP image and make it smaller in size.
Quickly convert printed text into a WebP image.
Quickly add a text label to a WebP image.
Quickly remove transparency and translucency from a WebP image.
Quickly visualize the WebP transparency via an alpha mask.
Quickly extract the alpha channel from a WebP image.
Quickly fill the alpha channel in a WebP image.
Quickly replace the alpha channel in a WebP image.
Quickly remove the alpha channel from a WebP image.
Quickly add artifacts and distortions to a WebP image.
Quickly find the size of a WebP image in bytes and kilobytes.
Quickly check the width and height of a WebP image.
Quickly generate a blank WebP image of any size and color.
Quickly generate a random WebP image with random colors.
Quickly find the dominant colors of a WebP image.
Quickly find the color of a single pixel in a WebP image.
Quickly extract objects based on their color from a WebP image.
Quickly round the corners of a WebP image.
Quickly convert a horizontal WebP image to a vertical WebP image.
Quickly convert a vertical WebP image to a horizontal WebP image.
Quickly flip a WebP image horizontally.
Quickly flip a WebP image vertically.
Quickly convert a PNG image to a WebP image.
Quickly convert a WebP image to a PNG image.
Quickly convert a JPG image to a WebP image.
Quickly convert a WebP image to a JPG image.
Quickly convert a GIF image to a WebP image.
Quickly convert a WebP image to a GIF image.
Quickly convert a WebP image into a hex code sequence.
Quickly convert a hex sequence into a WebP image.
Quickly convert a WebP image into a base64-encoded string.
Quickly convert a base64-encoded string into a WebP image.

Coming Soon

These WebP tools are on the way!
WebP Editor

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Convert APNG to WebP

Convert an APNG animation to a WebP animation.

Convert WebP to GIF

Convert a WebP animation to a GIF animation.

Convert GIF to WebP

Convert a GIF animation to a WebP animation.

Extract WebP Frames

Extract all frames from a WebP animation.

Convert WebP to MP4

Convert a WebP animation to an MP4 video.

Convert MP4 to WebP

Convert an MP4 video to a WebP animation.

Convert WebP to WebM

Convert a WebP animation to a WebM video.

Convert WebM to WebP

Convert a WebM video to a WebP animation.

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.

Extract WebP Frames

Extract one or more frames from a WebP animation.

Convert Sprite Sheet to WebP

Create a WebP animation from a sprite sheet.

Convert WebP to Sprite Sheet

Create a sprite sheet from a WebP animation.

WebP Viewer

View WebP images and in your browser.


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Created with love by

We're Browserling — a friendly and fun cross-browser testing company powered by alien technology. At Browserling we love to make people's lives easier, so we created this collection of WebP editing tools. Our tools have the simplest user interface that doesn't require advanced computer skills and they are used by millions of people every month. Our WebP tools are actually powered by our web developer tools that we created over the last couple of years. Check them out!

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Didn't find the tool you were looking for? Let us know what tool we are missing and we'll build it!