Blur Images with StackBlur and Export as Base64

For frontend developers and designers who need to quickly apply a StackBlur blur effect to images or canvas elements directly in the browser. No server uploads — your image stays local while you convert it to a downloadable base64 PNG/JPEG.

Open the Tool

Why use StackBlur Canvas Converter?

Instant StackBlur algorithm for smooth, fast blur

Works with any image or canvas data in your browser

Export the result as base64-encoded PNG or JPEG

No privacy risk — processing is done entirely on your device

How it works

  1. Upload an image or paste canvas data into the input field.
  2. Adjust the blur radius to your desired strength.
  3. Click 'Convert & Blur' to process the image.
  4. Copy the base64 output or download the blurred image directly.

FAQ

What is StackBlur?

StackBlur is a fast Gaussian blur algorithm that produces a smooth, high-quality blur effect while being efficient for real-time applications.

Can I use this with a canvas element?

Yes. Paste the canvas data URL or upload an image file, and the tool will apply the blur and return a base64 string.

Is my image uploaded to a server?

No. All processing happens locally in your browser using JavaScript, so your images never leave your device.

What formats are supported?

You can export the blurred image as PNG or JPEG, both as base64 encoded strings.