Cover the middle two columns with opaque black
Input and settings
A red/blue 4×2 px PNG; add x=1, y=0, width=2, height=2.
Expected result
Still 4×2 px; each row is red/black/black/blue. Black pixels have alpha 255.
Image Redactor
Cover selected image regions with opaque black and save an original-size PNG. Use it to hide visible details such as names or addresses.
How to use
- Choose an image and add regions by dragging or entering coordinates.
- Check that every intended detail is covered and create a PNG.
- Open the saved image and inspect text, faces, reflections and surrounding details for remaining information.
Image and regions to cover
Drop one JPEG, PNG or WebP image here.
Image limits: 40 MB, 70 megapixels and 16,384 px per edge. At most 100 regions; output PNG at most 96 MB. Memory estimates may reject otherwise valid sizes.
Drag over the image to add a region. For keyboard operation, use the numeric fields and Add region below.
Coordinates use original display-oriented pixels, with X=0 and Y=0 at the top left. Use plain integers, positive width and height, and keep each region inside the image.
Saved output
Try a use case and check the result
Specify cover rectangles and verify the affected pixels in the saved image.
Example buttons replace the inputs and settings above and calculate. Restore previous input steps back one example at a time. After trying multiple examples, repeat restore to return to your original input. This history is lost when the page closes.
Cover two separate corner pixels
Input and settings
Two 1×1 px regions: top-left (0,0) and bottom-right (3,1).
Expected result
Exactly two black pixels; the other six red/blue pixels and dimensions are preserved.
How to read the result
Coordinates are source-display pixels from the top left after orientation. Adding a region and generating the PNG are separate actions. Check the downloaded image as well as the preview.
Scope and limits
One JPEG/PNG/WebP up to 40 MB, 70 megapixels and 16,384 px per edge; at most 100 rectangles. Estimated-memory and 96 MB output limits apply. Opaque black covers pixels, but this is not a guarantee that all personal data, including filenames, is removed. Restore includes existing regions and unsubmitted numeric inputs.
Calculate black pixels independently for two rectangle sets, then verify every exported RGBA value and restoration of original regions.
Continue with the next task
Details and limits
Choose one image. Drag over the details to hide, or enter X, Y, width and height and add a region. Add multiple regions and remove entries to adjust them. Check the covered areas, create a PNG and save it.
Selected rectangular pixels are replaced with opaque black in a flat PNG image. The cover is not a temporary CSS overlay or a removable layer. No blur or automatic detection is performed; choose the details to hide.
The original file is unchanged. The preview is reduced to a maximum edge of 1,200 px, while the saved PNG uses the browser-decoded original display dimensions. JPEG orientation is applied and the saved dimensions are shown. No resized export is made.
Dragged regions are converted to original coordinates and rounded outward to whole pixels. Numeric fields allow single-pixel regions. Transparent pixels inside a region also become opaque black.
Details outside selected regions remain visible. Open the downloaded image and check that all intended text, faces, reflections or surrounding details are covered. Avoid sharing the original image along with it.
Rendering a new PNG does not carry over the source EXIF data. Complete color or metadata preservation and animation are not guaranteed. Unlike metadata removal, this tool covers details visible inside the image.
Encoded size, dimensions and estimated original-size processing memory are checked before decoding. Pixel buffers and reserves use a 256 MB budget on limited-memory devices and 1 GB otherwise. Oversized work is rejected without silently resizing the export. Browser internals may still fail within these limits.
Changing the image, fields or regions clears old output. Cancel retains the image and regions; reset clears the image, regions and output. Native operations may need to finish, but delayed results are discarded and cannot be saved.
Images, output and filenames stay in your browser and are neither stored nor sent. SVG, GIF and HEIC are unsupported.
Frequently asked questions
Does the black cover remain after saving?
Yes. The PNG replaces the selected pixels with opaque black. Check the covered areas in the downloaded image.
Is the original image changed?
No. A separate PNG is created. The original image still contains the details you covered.
What if a large image cannot be saved?
Try a smaller image. Byte, dimension and memory limits reject oversized work without silently reducing saved pixels.
Related tools
Share this tool
Share only the tool name and public URL. Your input and results are not included.
Inputs and storage
Keep any content you need before clearing. This tool does not autosave inputs or results. Reloading or closing the page, clearing inputs or resetting may discard your work.
Favorites and language preferences are stored separately and may be lost when site data is cleared. Tool resets and site-data deletion do not delete files already downloaded to your device.