How to use this image tool
- Select the source image.
- Set the available options for this task.
- Choose Process and review the real output.
- Download the generated result.
#196 · Photo Enhancement & Cleanup Tool
Dead Pixel Marker
Find isolated unusually bright or dark pixels, mark likely sensor defects, and export an annotated PNG plus an accurate candidate count.
Image Tool
Local browser processingpx
Ad space
What this tool does
Find isolated unusually bright or dark pixels, mark likely sensor defects, and export an annotated PNG plus an accurate candidate count.
Input pixels or embedded file data → validated browser operation → new downloadable output
Keep the original file. Browser rendering and encoding can vary, and visual outputs should be checked at full resolution.
Supported formats
PNG, JPEG, and WebP are supported where the browser can decode them. GIF input is treated as a single frame. SVG is not directly injected into the page.
| Format | Notes |
|---|---|
| PNG | Transparency supported |
| JPEG | No alpha channel |
| WebP | Browser support required |
Tips for better results
- Start with the highest-quality source available.
- Check edges, labels, and fine details at 100% zoom.
- For large photos, close memory-heavy tabs before processing.
FAQ
Are files uploaded when I use the Dead Pixel Marker?
No. Processing runs in your current browser tab. The page does not send selected image files to a processing server.
What image size can this dead pixel marker handle?
The practical limit depends on browser memory. This page stops raster operations above 40 megapixels to reduce crashes on large files.
Will the downloaded result keep the original metadata?
Canvas-generated images normally omit EXIF metadata. Extracted thumbnails are copied from the embedded EXIF preview without adding metadata.
Why can results differ between browsers?
Image decoding and JPEG or WebP encoding are supplied by the browser, so supported formats and compressed byte sizes can vary.
Can I use the output in a commercial project?
The tool does not change ownership of your source image. You remain responsible for having permission to use the image and its contents.
Related image tools
Processing limits
| Limit | Behavior |
|---|---|
| Privacy | Local browser processing |
| Large raster | 40 MP safety stop |
Browse more image tools
Image tool hubsCompression & ResizeReduce file size and resize images for web, email, and uploads.View all
Format ConversionConvert browser-supported JPG, PNG, WebP, SVG, and other image files.View all
Background & TransparencyChange solid backgrounds and prepare transparent images.View all
Metadata & PrivacyInspect and remove EXIF, GPS, and privacy-sensitive image metadata.View all