Image Blur
Apply blur or mosaic to selected areas of an image
Drop your image here or click to browse
Supported formats: PNG, JPG, WebP, GIF
Maximum file size: 50MB
What is Image Blur?
Image Blur is a free tool for applying Gaussian blur to an entire image or a selected area. Processing runs in your browser with the HTML5 Canvas API, so images are not uploaded to a server. Full Image mode blurs the entire photo, while Selected Area mode applies blur inside a rectangle you draw. Use the intensity slider to soften a background or visually obscure part of an image. Blur is a visual effect and does not safely delete or permanently redact information. Before sharing an image with sensitive content, remove that content or cover it with a solid-color mask. The tool supports PNG, JPG, WebP, and GIF files, and you can blur multiple areas in sequence.
How to Use
- Upload the image you want to blur.
- Choose full image or selected area mode.
- Adjust the blur intensity and apply.
- Check the result and download.
Tips & Best Practices
- Preview the result at the size you plan to share. For sensitive information, remove it from the image or cover it with a solid-color mask instead of relying on blur.
- In Selected Area mode, draw the blur rectangle slightly larger than the target area to ensure complete coverage with no readable edges visible.
- For artistic background blur effects, use Full Image mode at low intensity (5-10px) to create a soft, dreamy aesthetic for portrait backgrounds.
- When obscuring multiple areas, apply blur one area at a time and review the result before working on the next area.
- Test blur intensity and viewing size on a copy first. Text and numbers can remain readable through light blur.
Use Cases
Privacy Protection
Blur faces of bystanders, children, or individuals who have not consented to appear in publicly shared photos.
License Plate Redaction
Obscure vehicle license plates in photos before posting to social media, real estate listings, or street-view-style content.
Document Censoring
Blur sensitive fields on documents such as account numbers, addresses, or personal identification numbers before sharing screenshots.
Real Estate Photos
Blur neighboring properties, personal items, or identifiable information visible through windows in real estate listing photographs.
FAQ
Can I blur only a selected area?
Yes, using 'Selected Area' mode, you can drag on the image to blur only a specific area.
Can I adjust the blur intensity?
Yes, you can adjust the blur intensity from 1px to 50px using the slider.
What is Gaussian blur?
Gaussian blur is an algorithm that smoothly blurs an image by calculating a weighted average of surrounding pixels based on a normal distribution (Gaussian function). It produces a natural-looking blur effect.
Are my files uploaded to a server?
No. Image processing runs in your browser, and the file is not sent to an external server. However, blur is not a secure way to remove sensitive information.
Can I blur faces or license plates?
Yes, using 'Selected Area' mode you can drag over specific areas like faces, license plates, or personal information to blur them.
Can blurred content be recovered or unblurred?
Gaussian blur is an editing effect and should not be treated as a way to permanently delete or securely redact information. Remove sensitive content from the image or cover it with a solid-color mask before sharing.
What is the difference between full image and selected area blur?
Full Image mode applies blur uniformly across the entire photo. Selected Area mode lets you draw a specific rectangle on the image and only that region is blurred while the rest remains sharp.
Can I blur multiple areas in one image?
You can apply blur to one area, download the result, then upload it again to blur additional areas. The downloaded image includes each blur effect, but blur alone is not a secure redaction technique.
What blur intensity should I use for faces?
You can visually obscure faces, but blur alone does not guarantee anonymization. Remove sensitive face information or cover it with a solid-color mask before sharing.
Does blur work the same on all image formats?
Yes, the Gaussian blur algorithm works identically on PNG, JPG, WebP, and GIF images. The blur quality and appearance are consistent regardless of the input format.
Is Gaussian blur better than pixelation for privacy?
Gaussian blur and mosaic both create a visual obscuring effect. To safely remove sensitive information, use deletion or a solid-color mask instead of blur or mosaic.