BYTETOOLS

Blur Image

Blur an image online with an adjustable Gaussian blur slider. Preview the original and blurred photo side by side and download free — no upload needed.

Drop an image to blurProcessed locally — never uploaded

What is the Blur Image?

The Blur Image tool applies a smooth Gaussian blur to any photo with a simple slider — from a subtle 1-pixel soften to a heavy 50-pixel wash.

  • Adjustable Gaussian blur from 0 to 50 pixels
  • Live side-by-side preview of original and result
  • Full-resolution output — the download matches your image size
  • Great for backgrounds, privacy redaction and placeholders
  • Free, instant, no watermark, no sign-up
  • 100% local processing — images never leave your browser

How to use the Blur Image

  1. 1

    Drop an image into the upload area or click to browse.

  2. 2

    Move the blur slider to set the strength in pixels.

  3. 3

    Compare the original and blurred previews side by side.

  4. 4

    Click Download to save the blurred image as a PNG.

About the Blur Image

The Blur Image tool applies a smooth Gaussian blur to any photo with a simple slider — from a subtle 1-pixel soften to a heavy 50-pixel wash. The original and blurred versions sit side by side so you can dial in exactly the amount you need before downloading.

Blurring is perfect for creating soft website hero backgrounds, hiding sensitive details in screenshots, generating placeholder images for lazy loading, or adding a dreamy depth-of-field feel to product shots.

Processing uses the HTML5 Canvas in your own browser — the image is never uploaded, so screenshots containing personal data or confidential interfaces stay completely private.

Frequently asked questions

How do I blur an image online for free?

Upload the image, drag the blur slider until the preview looks right, and click Download. The whole process takes seconds, runs in your browser and adds no watermark.

What is Gaussian blur?

Gaussian blur averages each pixel with its neighbors using a bell-curve weighting, producing the smooth, natural softening used in professional photo editors. Higher radius values blend pixels over a wider area for a stronger effect.

Can I blur just part of an image?

This tool blurs the whole image, which is ideal for backgrounds and placeholders. To hide one region, crop that area first, blur it here, and paste it back in an editor — or blur heavily enough that the sensitive detail is unreadable everywhere.

Is blurring enough to hide sensitive text?

Use a strong setting. Light blurs on text can sometimes be partially reconstructed, so for redaction choose a high blur value and verify the text is genuinely unreadable in the preview before sharing.

Does blurring reduce image resolution?

No. The output keeps the exact pixel dimensions of your original — only the pixel values are softened. The downloaded PNG is full resolution.

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