Blur Image Online

01What is Blur Image?

03How it works

When you upload an image, the server decodes the bitmap and applies a Gaussian convolution kernel across each color channel. The radius parameter controls how many neighboring pixels contribute to each output value—higher radius means stronger blur spread. Edge pixels use mirrored padding so borders do not darken unnaturally. Preview renders at full resolution so text legibility and skin detail changes are visible before download. Output re-encodes as JPG or PNG depending on your selection, maintaining width and height identical to the source unless you chain with crop or resize tools afterward. Because blur is a local averaging operation, very small thumbnails may look mushy at high radius; reduce strength or start from a higher-resolution source for print-bound assets. The entire pipeline completes server-side in seconds with no plugin installation.

04Common use cases and tips

Use background blur on product lifestyle shots when the environment competes with the item—moderate radius keeps the subject sharp if you crop tightly first. For privacy, blur license plates, street addresses, and on-screen account numbers in screenshots before publishing tutorials. Portrait photographers apply subtle global blur then composite a sharp face layer externally for faux bokeh when lens aperture was too deep. Keep radius under 15 for document redaction where text must become unreadable but layout remains recognizable for reviewers. Pair with image cropper to isolate regions before blurring for faster processing on large DSLR files. Avoid extreme blur on JPEGs with heavy compression—it amplifies block artifacts. Export PNG when further editing in design tools; JPG when uploading to CMS with byte limits.

ImgifyTools vs iloveimg

See how our free blur image compares to iloveimg on price, limits, and features.

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