Black Out does not and will not support multi-page PDFs.
Black Out lets you quickly hide sensitive parts of an image.
This can be useful when you want to post a screenshot or photo on the web that contains some information you don't want to be revealed.
It also removes all metadata, like when and where a photo was captured.
Black Out is intentionally simple. It doesn't have the ability to resize or rotate the black boxes. It's meant as a tool to quickly redact some sensitive information, not to perfect an image. If need something more advanced, you can use Preview or any other graphics editor.
NOTE: Black Out does not and will not support multi-page PDFs. You can open such PDFs, but only the first page will be used.
■ Getting Started
- Drag and drop an image onto the window
- Drag and drop an image on the Dock icon
- Click the Open button and choose an image
- Right-click an image in Finder and choose Black Out in the "Open With" menu
- Paste in an image from another app or Finder (Click "Paste" in the "Edit" menu or press Command+V)
Then click and drag to create black boxes over the parts of the image you want to hide. You can move a box around by dragging it. When you’re happy with the result, click the Export button to save your new redacted image. You can also copy the redacted image (Click "Copy" in the "Edit" menu or press Command+C) for use in another app, or paste it into a directory in Finder.
You can export to PNG, JPEG, or HEIC.
Tip: Black Out comes with a Quick Action. To use it, right-click an image in Finder, select “Quick Action › Customize…”, enable the Black Out extension, and then go back to the “Quick Action” menu item.
■ Frequently Asked Questions
‣ Does it support PDF?
You can open a PDF document, but it will only load the first page and you have to export it as an image. It's almost impossible to reliably export redacted PDFs.
‣ Can you support blurring and pixelation?
Blurring and pixelation are intentionally not supported as they can sometimes be reversed (Search for "blurring sensitive" on Google). The only reliable way to redact something is to put a black box over it.
‣ I can already do this in the Preview app!
You can do this in any graphics app. The point of this app is to make the task super easy to do. Most graphics apps, like Preview, Pixelmator, and Photoshop, preserve metadata, which means you could accidentally leak information like the capture location. Black Out strips out all metadata. Black Out also comes with a Quick Action extension, which lets you redact an image directly from Finder, Mail, Notes, and other apps supporting that.
Click the “Send Feedback…” menu item in the “Help” menu in the app.
- Bug fixes.
Ratings and Reviews
This works just as expected. Only issue is the quick action shows "extimating time remaining" and just hangs there... but I can still just finish the image anyway. Also tall images go off of the screen and I cannot see which buttons I am clicking to finish or clear etc.
Otherwise, the core of the app is great. Just the quick actions are extremely buggy, in my experience.
Developer Response ,
The “estimating” thing is a bug in Finder. It’s completely out of my control. If you run the Black Out quick action from Mail or Notes, it’s not there. I have reported it to Apple already*. I have not been able to reproduce the issue with the image going off the screen, but that is also definitely a Finder bug, since an extension should not even be able to do that even if it tried. All in all, the quick action system is pretty buggy as it’s relatively new and very few apps are using it. Hopefully, Apple will improve it in future macOS versions.
Did I say I love this app?
It's quick, simple, and reliable. Redacting with Finder is easy enough but this is even easier. And the recently-added Quick Action feature is great! Thank you to the developer :-)
Exactly what I needed
This app does exactly what I need, and the developer seems to be committed to making sure it is fully secure (it strips out metadata, and does not support insecure methods like blurring).
Would recommend this app 100%, great work!
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- Sindre Sorhus
- 3.1 MB
- Graphics & Design
- Requires macOS 10.15 or later.
- Age Rating
- © Sindre Sorhus
With Family Sharing set up, up to six family members can use this app.