Blur Image Online — Free & Private
Apply Gaussian Blur to Any Photo Instantly. Adjustable Strength. No Uploads — 100% In-Browser.
When to Blur an Image
Privacy & Anonymization
- Blur faces in photos before sharing on social media
- Soften license plates in street photography before publishing
- Blur personal information visible in screenshots
- Obscure bystanders in event or venue photography
Design & Creative
- Create a blurred background effect for product showcase photos
- Apply depth-of-field style blur to flatten backgrounds
- Blur background images for UI overlays and modal backgrounds
- Soften textures for use as presentation or document backgrounds
Documentation & Screenshots
- Blur API keys, passwords, and tokens in technical screenshots
- Soften irrelevant interface elements in tutorial screenshots
- Blur email addresses and personal data in documentation images
- Obscure confidential file names or system paths in screenshots
How to Blur an Image Online — 3 Steps
Upload Your Image
Drag and drop any JPG, PNG, WebP, or GIF image into the blur tool, or click to browse. Your file stays in your browser — nothing is uploaded.
Adjust Blur Strength
Use the slider to set the blur intensity (1–25 pixels). The preview updates in real-time so you can find exactly the level of softening you need.
Download the Blurred Image
Click Download to save the blurred image as JPG. No watermarks, no sign-up, no server uploads — your image never leaves your device.
Free Online Image Blur Tool — Gaussian Blur in Your Browser
Need to blur a face, obscure sensitive information, or create a soft background effect? PicsSizer's blur tool applies a Gaussian blur filter directly in your browser using the HTML5 Canvas API — no server upload, no account required, no watermarks. Upload any JPG, PNG, or WebP image, adjust the blur strength with a slider, and download the result instantly. Because everything runs on-device, your private photos, screenshots, and documents never leave your computer.
Common Uses for Image Blurring
Blurring is used in two broad categories: privacy protection and creative effects. For privacy, blurring faces, license plates, and personal information is now standard practice before sharing photos online — required by GDPR for identifiable individuals in public photos. For creative use, a blurred background simulates the depth-of-field effect of a professional camera, drawing attention to the subject. Developers and technical writers use blurring to obscure API keys, tokens, and credentials in screenshots shared in documentation or on GitHub.
Choosing the Right Blur Strength
For subtle softening (reducing detail while keeping the image recognizable), use 1–5px. For face and license plate privacy at typical web image sizes, 8–15px renders features unrecognizable. For heavy obscuring of text or sensitive data, 15–25px ensures the content cannot be recovered. Note: light blur (<5px) does not provide privacy protection — content may still be legible with image enhancement tools. For sensitive data, use the Redact tool instead, which applies an opaque black box rather than a reversible blur.
More Privacy & Image Tools
Protect sensitive content and manage image metadata — all in your browser.
Pixelate Image
Apply a pixelation effect to obscure faces, text, or regions.
Redact Image
Draw black boxes over sensitive areas — permanent, irreversible redaction.
Bulk EXIF Stripper
Remove GPS coordinates and metadata from images before sharing.
Image Metadata Viewer
See exactly what metadata is embedded in your image files.
Blur Image — Frequently Asked Questions
Common questions about blurring images online