DevToolsmith

Grayscale Image

Convert a picture to grayscale while preserving its dimensions and transparency.

Runs 100% in your browser — nothing is uploaded

Result details
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15 MB / 12 megapixels · Current browsers with OffscreenCanvas · Static PNG output for effects; Image Splitter exports PNG tiles in a ZIP. Original files stay on this device.

Use Grayscale Image

Convert a picture to grayscale while preserving its dimensions and transparency. Choose a local image and adjust the settings before processing.

Behavior and limits

RGB channels are combined with weighted coefficients 0.2126, 0.7152 and 0.0722. Alpha is retained. This is an image effect, not a color-managed photographic proof. Output is PNG with embedded source metadata omitted.

Expected behavior for the example

Choose an image, apply the settings and download a fresh PNG. The source file stays unchanged.

Check important output in the application that will consume it. Use the tool directory to find related formats and tasks.

Frequently asked questions

How does Grayscale Image handle my input?

RGB channels are combined with weighted coefficients 0.2126, 0.7152 and 0.0722. Alpha is retained. This is an image effect, not a color-managed photographic proof. Output is PNG with embedded source metadata omitted.

Is my input uploaded or saved automatically?

Processing runs locally in this browser. Input and results are not saved automatically. Downloads happen only when you choose them. The static preview blocks scripts and external resources when one is available.