You cropped a screenshot for Slack, then noticed an order number in the corner. Before you send, you need a fast soften pass, not a full Photoshop session. This page runs the filters in your tab so pixels stay on your device.
Or browse files from your phone or laptop.
Strong Gaussian passes look lovely on backgrounds until they swallow eyelashes and product edges. The fix is rarely maxing the slider. You dial strength until faces stay readable while junk behind them melts away.
Motion blur rewards diagonal movement, yet horizontal streaks on a vertical subject feel like a camera mistake instead of style. Match angle to the implied direction in the frame.
Picture a 1200px team photo: Gaussian blur at medium strength keeps jackets recognizable while name badges turn to gray fog. Box blur, by contrast, averages square neighborhoods, so edges get a grittier, almost mosaic halt. Neither is better. They answer different moods.
| Look you want | Start here |
|---|---|
| Portrait background falloff | Gaussian, low to mid strength |
| Speed streaks or light trails | Motion, angle aligned with motion |
| Zoom burst or tunnel emphasis | Radial around center mass |
| Uniform softening for pixel art tests | Box for even, chunky smoothing |
After blur, sharpening often fights the effect. If you need crisp detail back on edges, our sharpen page is the logical next step, applied lightly on a duplicate layer in your editor of choice.
Your file loads into an HTML canvas. The script reads pixel rows as RGBA arrays, then writes a second array for the blurred result. Gaussian mode builds a bell-shaped kernel so nearby pixels influence each output more than distant ones. Motion mode samples positions along a vector at the angle you set. Radial mode averages samples around a ring whose radius grows with distance from the image center. Box mode is the straightforward average of a square window.
Every change to type, strength, or angle recomputes the output array and paints the right-hand canvas again. Nothing leaves your machine unless you click download.
Designers often stack blur with vignettes or color grading. If saturation feels flat after a heavy pass, tweak hue elsewhere first, then return here for a final soften. The order matters because blur averages color channels together, which mutes contrast you might have fought to preserve.
Batch editors on the desktop still beat browsers on throughput when you process hundreds of assets. This page suits one-off social crops, quick redlines, and mockups where waiting five seconds beats opening a licensed suite.
Privacy and limits. Processing stays client-side. Huge images (for example 6000px wide) stress JavaScript loops, so preview updates slow down. For print-ready work, desktop editors still win on speed. Radial and motion modes here are artistic approximations, not lens-accurate physics sims.
If you only need luminosity shifts without losing edge definition, lighten or darken may fit better than another blur pass.
Practical answers about modes, files, and limits.
Each pixel consults neighbors up to the kernel size. A 24 megapixel image multiplies those operations enormously. Resize in another app first, or test on a smaller export, then run the final blur on a modest copy here.
Not exactly. This motion mode averages samples along a straight line. Real shake wiggles in curves. You still get believable streaks for graphics and thumbnails when you align angle with the subject.
Gaussian at medium or high strength usually scrambles glyphs faster than radial. Always zoom in afterward. If compliance matters, combine blur with solid masks or cropping.
No. The image stays inside your browser memory for preview and download. Clear the tab or refresh and the data is gone unless you saved a file.
Download is PNG to avoid extra compression artifacts on an already filtered image. Convert to JPEG elsewhere if you need a smaller attachment.
