Image Tools
Blur Image — Live Preview with 0–30px Adjustable Strength
Blur images free from 0 to 30px with a live debounced canvas preview. Export PNG, JPEG, or WebP up to 50MB. No signup — upload and blur instantly.
Blur Image on FYN Tools is a free Image Tools utility. Open Blur Image in your browser — no signup required. Upload an image up to 50MB, drag the blur strength slider from 0 to 30 pixels, watch a live debounced preview update via canvas ctx.filter, then download the result as PNG, JPEG, or WebP — all processed locally in your browser. Related: Flip Image.
Privacy & processing: 100% client-side browser processing — blur is applied through the HTML canvas filter API (ctx.filter = blur(Npx)) and exported locally; your image never leaves your device.
TL;DR: Upload an image up to 50MB, drag the blur strength slider from 0 to 30 pixels, watch a live debounced preview update via canvas ctx.filter, then download the result as PNG, JPEG, or WebP — all processed locally in your browser.
Reviewed by FYN Tools Editorial · Guides ·
Data input / output
| Inputs | Any image file up to 50MB |
|---|---|
| Outputs | A blurred version of the uploaded image in PNG, JPEG, or WebP format |
| Formats | Input: common image types via accept="image/*"; Output: PNG, JPEG, or WebP (selectable) |
| Limits | Maximum upload size is 50MB; blur strength range is 0–30 pixels |
| Processing | Client-side (browser canvas filter rendering) |
How to Use the Blur Image
- Click Upload Image and select a file (up to 50MB).
- Drag the Blur Strength slider from 0px (no blur) to 30px (maximum blur).
- Watch the live preview update as you adjust the slider.
- Choose an output format: PNG, JPEG, or WebP.
- Review the blurred preview at your chosen strength.
- Click Download to save the blurred image.
What is a Blur Image?
This tool applies blur using the browser's native canvas filter: the image is drawn onto a canvas with ctx.filter set to blur(Npx), where N is your slider value from 0 to 30. A 50ms debounce on slider changes keeps the live preview smooth without re-rendering on every pixel of movement, so you can dial in the exact strength before downloading.
The UI displays a 50MB maximum file size. Output format is selectable between PNG, JPEG, and WebP. The default blur strength starts at 6px. Everything runs client-side — there is no server upload and no AI processing, just a straightforward CSS-filter-style blur rendered through canvas.
After upload, the image loads into an in-memory Image element and is drawn onto a canvas at its original dimensions with the blur filter applied. Changing the slider or output format triggers a debounced re-render. Download packages the canvas output as a data URL converted to a downloadable blob in your chosen format.
How it works
You set image file upload (png/jpg/webp as supported) + on-screen settings in the live panel. Blur Image then blur image online with adjustable blur intensity. Create soft backgrounds and privacy blur effects. Results show as processed image preview + download.
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Usage scenarios
- Screenshot privacy redaction: Blur names, emails, or account numbers visible in a screenshot before posting it in a support ticket or forum.
- Soft-focus background effect: Apply a moderate 8–15px blur to a photo that will sit behind text in a slide or social graphic.
- Web-ready blurred export: Choose WebP output after blurring to keep file size small for a website hero background.
Input / Output Examples
Input
Image file upload (PNG/JPG/WebP as supported) + on-screen settings
Output
Processed image preview + download
Input
Open /blur-image and run a second sample
Output
Processed image preview + download (iterate settings if the tool has options)
Frequently Asked Questions
Can I control blur amount?+
Yes, you can set blur strength from very light to strong blur.
What formats are supported?+
You can export blurred images as PNG, JPG, or WEBP.
Is this blur image tool mobile-friendly?+
Yes, it works on mobile, tablet, and desktop browsers.
Why use a blur image tool?+
Blurring helps protect privacy (e.g., faces or license plates), create soft backgrounds, add artistic effects, or reduce distractions in photos before sharing.
Key Features
- Blur strength slider (0–30px)
- Live debounced canvas preview (50ms)
- PNG, JPEG, and WebP export
- 50MB maximum upload size
- Instant client-side processing
Benefits
Redact sensitive details in seconds without Photoshop.
Preview blur strength in real time before committing to a download.
Keep private images on your device — no server upload.
When to Use Blur Image
- Blurring faces, license plates, or sensitive text in a screenshot before sharing
- Creating a soft background effect on a photo for a presentation slide
- Reducing detail in an image used as a design mockup background
- Quick privacy redaction when you need a blurred export without a full editor
Advantages
- Live debounced preview as you drag the slider
- Precise 0–30px blur range via native canvas filters
- PNG, JPEG, and WebP output options
- 50MB upload support with client-side processing
Tips
- Start around 6–10px for subtle privacy blurring; increase toward 20–30px for heavy obscuring.
- Use PNG when you need lossless quality; switch to WebP for smaller file sizes.
- The preview debounces at 50ms — pause briefly on your target value for the sharpest preview update.
- This blurs the entire image uniformly; for regional blur, combine with the Pixelate Tool or crop first.
Common Mistakes
Uploading a file larger than 50MB and expecting it to process.
Expecting selective or brush-based blur — this tool blurs the whole image at once.
Setting blur to 30px and being surprised that fine text becomes completely unreadable.
Summary
Upload an image, slide to your desired blur strength between 0 and 30 pixels, pick PNG, JPEG, or WebP, and download — with a live preview that updates as you adjust.