How is the sepia effect calculated?

Each pixel's output channels are computed as: R = min(255, r×0.393 + g×0.769 + b×0.189), G = min(255, r×0.349 + g×0.686 + b×0.168), B = min(255, r×0.272 + g×0.534 + b×0.131). This is the standard sepia colour matrix.

Can I adjust the intensity of the sepia effect?

The current tool applies a full 100% sepia effect. A partial sepia can be approximated by blending the sepia output with the original image in an image editor.

Does the sepia filter work on photos with transparency?

Yes. PNG images with transparency are supported; the alpha channel is preserved so transparent areas remain transparent after the filter is applied.

Image Sepia Filter

Apply a sepia tone filter to any image for a warm, vintage look. Preview before/after and download the result.

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FAQ

How is the sepia effect calculated?: Each pixel's output channels are computed as: R = min(255, r×0.393 + g×0.769 + b×0.189), G = min(255, r×0.349 + g×0.686 + b×0.168), B = min(255, r×0.272 + g×0.534 + b×0.131). This is the standard sepia colour matrix.
Can I adjust the intensity of the sepia effect?: The current tool applies a full 100% sepia effect. A partial sepia can be approximated by blending the sepia output with the original image in an image editor.
Does the sepia filter work on photos with transparency?: Yes. PNG images with transparency are supported; the alpha channel is preserved so transparent areas remain transparent after the filter is applied.

The Image Sepia Filter applies a classic sepia tone to uploaded images using per-pixel colour matrix calculations (newR = r×0.393 + g×0.769 + b×0.189, and so on). This produces the warm brown tones associated with vintage photography. A before-and-after preview is displayed side by side. All processing runs in your browser using the HTML Canvas API — no data leaves your device.