Blur and mosaic are not the same as removing information

Blur blends neighboring colors; mosaic replaces a region with coarse blocks. They can soften a background or create a visual effect, but neither guarantees irreversible redaction.

To remove an address, account number or identity detail from a public image, crop the region away or use an opaque redaction method and flatten the export. This blur tool does not verify secure information removal.

Compare the visual effects

Effect Appearance Useful for Limitation
Blur Smooth Softening background details Outlines and surrounding context can remain
Mosaic Blocky A coarse visual effect Does not guarantee text or numbers cannot be inferred

Neither method is universally safer. Even apparently unreadable text can reveal length, formatting or contextual clues.

Apply an effect in the tool

  1. Load an image into the blur and mosaic tool.
  2. Select an effect and strength, then mark the region.
  3. Zoom into the preview and check edges and overlooked areas.
  4. Save separately from the original and reopen the downloaded file.

Pixel-strength values depend on image resolution and text size. They are not safety thresholds.

Before sharing

Check notifications, browser tabs, filenames, background documents, reflections, location details and QR codes. Editing visible pixels alone does not prove that source files, layers or metadata are absent. Inspect the actual export that you intend to publish.

Frequently asked questions

Can a strong blur protect confidential information?

Visual concealment is different from preventing recovery or inference. Use an appropriate removal or opaque-redaction method for confidential information.

Is the image uploaded?

Processing happens in the browser. Shared-device access, extensions and management of the eventual sharing destination remain separate considerations.

Can I undo a saved effect?

The tool cannot recover the exact original pixels from the exported effect. Keep an unpublished original separately for future edits.