Redact image content
Permanently mask sensitive details in images with opaque black rectangles.
Processed locally in your browser with zero server uploads. (Max 20MB per file, 40MB total, <=25MP, JPG/PNG supported)
Permanently overwrites selected area with opaque black pixels (not a removable overlay or blur). Exports a flattened secure PNG.
Please select an image file to begin.
All files are processed strictly inside your browser memory and are never uploaded to any server.
How to use
- Open the JPG or PNG image containing sensitive information.
- Drag over areas to cover them with permanent opaque black boxes.
- Export the flattened PNG file with all covered pixel data removed.
Limits & Specifications
JPG and PNG input only, max 20MB per file. Masks are applied as opaque black rectangles and exported as a flattened PNG. Does not support PDF document redaction.
Illustrative Example
Example (Illustrative): Masking national ID numbers and address lines on an identification photo before submission.
Frequently Asked Questions
Can masked content underneath the black rectangle be recovered?
No. The image is flattened directly onto an HTML canvas, replacing original pixel data completely before export.
Can I redact text inside PDF files with this tool?
No. This tool only processes raster images (JPG/PNG). PDFs cannot be redacted with this tool.