Editing4 min read
How to Blur an Image Online (Free, No App Needed)
Blur an image in seconds using your browser. No Photoshop, no account, no upload. Adjust Gaussian blur intensity from subtle to heavy, then export as PNG or JPG.
Blur Image
Apply a Gaussian blur or a pixelate/mosaic effect to any photo — adjust strength from subtle to heavy. Free, instant, and private — nothing is uploaded.
Drop an image here, click to browse, or paste
Supports JPG, PNG, WebP, GIF, HEIC, and more
✓Free forever
✓No account required
✓No watermark
✓Nothing uploaded to servers
Related tools
Everything you need to blur an image online
Adjustable blur radius
Slide from 1px for a gentle softening effect to 30px for a heavy Gaussian blur. The live preview lets you fine-tune before you apply.
Blur or pixelate — your choice
Switch to Pixelate mode for a blocky mosaic effect instead of a smooth blur — the classic redaction look for faces, plates, and sensitive text. Adjustable block size from 4px to 40px.
100% private — no upload
Your image never leaves your device. All blur processing runs in your browser using the Canvas API. No server, no cloud, no data stored.
Instant results
Canvas-based rendering completes in under a second for most images. No waiting for server processing or file transfers.
Works on any device
Fully responsive — use it on desktop, tablet, or mobile without installing anything. Just open pixeltools.io/blur in your browser.
Multiple export formats
Save your blurred image as PNG (lossless), JPG, or WebP. Adjust JPEG/WebP quality from 60% to 100% to balance file size and sharpness.
Edge-accurate blur
PixelTools uses a padded canvas technique to prevent edge bleed artifacts — the corners and edges of your image blur cleanly without semi-transparent halos.
Three steps to a blurred image
- 1
Upload your image
Drag and drop an image onto the page, click to browse, or paste from your clipboard. Supports JPG, PNG, WebP, GIF, BMP, TIFF, and HEIC.
- 2
Choose blur or pixelate, and adjust strength
Pick Blur for a smooth Gaussian effect (1–30px) or Pixelate for a blocky mosaic effect (4–40px block size). The preview updates instantly so you can judge the effect before committing.
- 3
Download your image
Click Apply Blur, then download as PNG, JPG, or WebP. The result is processed entirely in your browser — nothing is uploaded.
Built for anyone who works with images
Whether you are hiding sensitive data in a screenshot, softening a background for a social post, or creating an artistic blur effect — PixelTools blurs your image in seconds with no upload required.
Hide sensitive information
Blur out faces, license plates, email addresses, phone numbers, or any private detail before sharing a screenshot or photo publicly.
Artistic background softening
Apply a soft blur to create a dreamy or shallow-depth-of-field look. Great for portraits, product shots, and social media content.
Clean up screenshots
Redact usernames, passwords, or confidential data from UI screenshots before sharing in docs, tickets, or presentations.
Web and social media assets
Create blurred hero backgrounds, thumbnail overlays, or frosted-glass effects for banners and cover images.
Frequently asked questions
Is the blur image tool free?
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Yes, completely free with no limits. Blur as many images as you want. No subscription, no account, no trial required.
Does blurring an image upload it to a server?
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No. PixelTools processes images entirely in your browser using the Canvas API. Your image never leaves your device — no upload, no cloud processing, no data retained.
What blur radius should I use?
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For subtle softening or skin retouching, use 1–5px. For redacting text or hiding faces in screenshots, 10–20px is typically enough. For a heavy artistic blur effect, try 20–30px. The live preview lets you judge before you commit.
Can I blur only part of an image?
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This tool blurs the entire image. For selective or regional blur (e.g., blur only a face while keeping the rest sharp), use PixelTools' dedicated Blur Face tool, or a desktop editing app like Photoshop or GIMP. Full-image blur covers the most common use cases: background softening, screenshot redaction, and artistic effects.
What image formats are supported?
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JPG, PNG, WebP, GIF, BMP, TIFF, and HEIC/HEIF (iPhone photos). You can export the blurred result as PNG (lossless), JPG, or WebP.
Will blurring reduce my image quality?
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Blur itself transforms the pixels — that is the intended effect. If you export as PNG, the container is lossless so no additional quality loss is introduced. If you export as JPG or WebP, use a high quality setting (90%+) to avoid compression artifacts on top of the blur.
Can I use blurred images commercially?
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PixelTools does not claim any rights over images you process. The blurred output is your file to use however you like. Note that intellectual property rights in the original image are not affected by using our tool.
What's the difference between blur and pixelate?
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Blur applies a smooth Gaussian softening, while pixelate breaks the image into blocky mosaic squares — the classic look used to redact faces, license plates, or documents. Both run entirely in your browser; pick whichever style you need from the Effect toggle above the slider.
What pixel size should I use for pixelate mode?
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For a fine mosaic that still hints at the underlying shape, use 4–12px. For strong, unrecognizable redaction of faces or text, use 20–40px. Larger block sizes make it harder to reverse-engineer the original content.
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