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Free Tools Galaxy
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100% free · no signupRuns in your browser

Blur Image

Apply a Gaussian blur to any image with adjustable radius.

Best for: Use it to obscure faces or text, soften a busy background, or add a depth-of-field effect.

Complete guide

Input

100% private — your file is processed in your browser and never uploaded.

How it's calculated & sources
The Blur Image uses the standard method for this calculation. It runs entirely in your browser, so your inputs are never uploaded. Last reviewed June 2026.

Free & no sign-up · runs entirely in your browser. Results are estimates for general information, not professional advice — verify important decisions with a qualified expert. Last reviewed June 2026.

Continue your journey

Where people usually head next.

🎨
Color Picker
Pick colors and get HEX, RGB and HSL values.
🗜️
Image Compressor
Reduce JPEG file size by re-encoding at chosen quality — 100% in-browser.
📐
Image Resizer
Resize images to any width/height with optional aspect ratio lock.
🔄
Image Converter
Convert images between PNG, JPEG and WebP in your browser.

Complete guide

Quick answers

Short, sourced answers to the questions people (and AI assistants) ask most.

What is Blur Image?
Blur Image softens an image or a region - to hide sensitive details, reduce noise or create a soft background.
Why does Blur Image matter?
The blurred area loses detail. For censoring, note a light blur can sometimes be partially reversed - use a strong blur or pixelation for sensitive data.
How is Blur Image calculated?
A blur is applied on a canvas in your browser, averaging each pixel with its neighbours over the radius you choose.
What are common blur image mistakes?
Using a weak blur to hide sensitive text, which may be recoverable.
When should you use the Blur Image?
Use it to obscure faces or text, soften a busy background, or add a depth-of-field effect.

What is the Blur Image?

Blur Image softens an image or a region - to hide sensitive details, reduce noise or create a soft background.

How the Blur Image works

A blur is applied on a canvas in your browser, averaging each pixel with its neighbours over the radius you choose.

Common mistakes to avoid

  • Using a weak blur to hide sensitive text, which may be recoverable.
  • Blurring the whole image when only a region needed it.
  • Over-blurring and losing the subject.

Keywords: blur, gaussian, image.

Runs entirely in your browser. Your image is not uploaded.

Reviewed by the Free Tools Galaxy editorial team · Updated June 2026 · Calculated privately in your browser.

Frequently asked questions

Is the Blur Image free to use?+

Yes. Every tool on Free Tools Galaxy is 100% free, runs in your browser and requires no signup.

How accurate is the Blur Image?+

Blur Image uses the standard blur image formula in double-precision arithmetic, so the same inputs always produce the same result and you can verify any figure by hand. It is an educational estimate — real-world outcomes depend on your actual rates, rules and assumptions.

Do you store my inputs?+

No. The Blur Image runs entirely in your browser. Nothing is uploaded or saved to a server.

Can I use the Blur Image on mobile?+

Yes — the interface is fully responsive and works on phones, tablets and desktops.

What are common mistakes to avoid?+

The most frequent mistake is mixing units. Double-check your inputs use a single, consistent unit before clicking Calculate.

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Smart Autopilot

AI-style routing · 100% on-device

Based on this tool, your recent activity and how others chain tools together.

Likely next step

🎨Color PickerTop match🗜️Image CompressorReduce JPEG file size by re-encoding at chosen quality — 100% in-browser.📐Image ResizerResize images to any width/height with optional aspect ratio lock.🔄Image ConverterConvert images between PNG, JPEG and WebP in your browser.✂️Image CropperCrop any image to a custom rectangle entirely in your browser.🔃Image RotatorRotate any image by any angle and download losslessly.

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Pixelate Image
Apply a pixelation/mosaic effect to any image with adjustable block size.

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Share & publish

Share & challenge

Twitter Facebook LinkedIn WhatsApp
Share-to-grow kit (Reddit, LinkedIn, Medium)
Reddit post
Title: I built/used this free blur image — instant, no signup

Body: Apply a Gaussian blur to any image with adjustable radius. Try it: https://freetoolsgalaxy.com/tools/blur-image
LinkedIn post
Blur Image on Free Tools Galaxy — Apply a Gaussian blur to any image with adjustable radius. https://freetoolsgalaxy.com/tools/blur-image
Medium intro
# Blur Image — the free tool I keep coming back to

Apply a Gaussian blur to any image with adjustable radius.

Try it: https://freetoolsgalaxy.com/tools/blur-image
Quora answer
The fastest way is to use a free in-browser blur image: https://freetoolsgalaxy.com/tools/blur-image. Apply a Gaussian blur to any image with adjustable radius.

Embed this tool anywhere

Free embed code for blogs, docs and dashboards. Every embed sends a backlink home — helping you and the galaxy grow together.

HTML iframe
Drop into any site — auto-resizes to its content height, theme-aware.
<iframe src="https://freetoolsgalaxy.com/tools/blur-image?embed=1" title="Blur Image" loading="lazy"
  style="width:100%;height:600px;border:0;border-radius:16px;background:#0b1020"
  allow="clipboard-write"></iframe>
<script>window.addEventListener("message",function(e){if(e.data&&e.data.type==="ftg-embed-height"){document.querySelectorAll("iframe").forEach(function(f){if(f.contentWindow===e.source){f.style.height=e.data.height+"px";}});}});</script>
<p><a href="https://freetoolsgalaxy.com/tools/blur-image" target="_blank" rel="noopener">Powered by Blur Image on Free Tools Galaxy</a></p>
Responsive wrapper
Aspect-locked container — good for blog post bodies.
<div style="position:relative;padding-bottom:75%;height:0;overflow:hidden;border-radius:16px">
  <iframe src="https://freetoolsgalaxy.com/tools/blur-image?embed=1" title="Blur Image" loading="lazy"
    style="position:absolute;inset:0;width:100%;height:100%;border:0" allow="clipboard-write"></iframe>
</div>
WordPress / Markdown
Paste in a custom-HTML block or markdown file.
[Blur Image — free online tool](https://freetoolsgalaxy.com/tools/blur-image)

<iframe src="https://freetoolsgalaxy.com/tools/blur-image?embed=1" width="100%" height="600" frameborder="0"></iframe>
Text link-back
Minimal credit link — best for sidebars and footers.
<a href="https://freetoolsgalaxy.com/tools/blur-image" target="_blank" rel="noopener">Try the free Blur Image</a>

Share-to-Grow Kit

Pre-written, ready-to-paste posts for every major channel. Help others discover this tool — and earn backlinks.

Title
I built a free image converter that works instantly in the browser — no signup, no ads in your face
Body
Hey r/[subreddit],

I kept needing a quick image converter and most options online were slow or behind paywalls, so I built one that:

• Runs 100% in your browser (your data never leaves your device)
• No signup, no email wall, no popups
• Loads in under a second on mobile

It covers the standard image use cases (image, convert, png, jpeg) and links out to the formula + worked examples if you want to learn the math.

Link: https://freetoolsgalaxy.com/tools/image-converter

Happy to take feedback — what's missing?
Post to a relevant subreddit (e.g. r/InternetIsBeautiful, r/webdev, r/productivity). Avoid spammy subs.
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