Screenshots That Leak: What to Hide Before You Post One
Updated · by the My Gadgets team
A screenshot shows everything on the screen, not just the part you meant to share: other people's names and numbers in a chat, your email in a corner, open tabs, a notification that arrived at the wrong moment. Before you post one, look at it as a stranger would, crop away everything you don't need, and cover what's left with solid boxes, not a light blur. This article lists what usually leaks, shows how to hide it properly, and explains two mistakes that undo the hiding.
What do screenshots usually give away?
Go through this list once with your screenshot open. Most leaks are in the edges, not the middle.
| Where | What leaks |
|---|---|
| Chat screenshots | Other people's names, phone numbers, profile photos, group names, message previews above and below the one you meant |
| Status bar | Time, carrier, sometimes location icons; on a work phone, the company's management profile |
| Notifications | A banner that arrived while you took it: a bank alert, a private message, a 2-step verification code |
| Browser window | Open tabs, bookmarks bar, the address bar with search terms or a link containing a login token, your profile picture |
| Email and documents | Your address and the recipient's, reference and account numbers, signatures |
| Desktop | File names and folder paths (often containing your username), other open windows, a calendar with meetings |
| Code and terminals | API keys, passwords in environment variables, internal server names, customer data in logs |
| Maps and delivery apps | Your home address, the route, the driver's name |
Two less obvious ones: personal details in the content (the face of a friend in a video call grid, a reflection in a dark window), and anything the screenshot proves about where you work or what systems you use.
Screenshots don't contain GPS coordinates the way camera photos do, but they don't need to: what's on screen usually says more.
How do I hide details properly?
1. Crop first
Cropping is the most reliable redaction there is: what's cropped away isn't in the file at all. Cut the screenshot down to the part you need with Crop Image, which drops the status bar, browser chrome and surrounding messages in one step. Crop Image draws the kept area onto a fresh image, so nothing from outside the crop survives in the saved file.
2. Cover what's left with solid boxes
For details inside the part you keep, use Blur Image:
- Under Where, choose Only areas I select.
- Drag a box over each name, number, address or face. On a phone, drag with your finger.
- Under Effect, choose Solid black box for anything that must not be read.
- Download the PNG.
Make each box a little larger than the text it hides. Partly covered letters, especially at the start and end of an email address, can be enough to guess the rest.
3. If you are making a polished image for a post
Screenshot Studio frames a screenshot with a background, padding and shadow for social media and documentation. Its Blur tool blurs the picture under the box you draw, and its crop removes edges before framing. For anything sensitive, still run the result through Blur Image's solid box: a frame makes a screenshot look finished, which is exactly when people stop checking it.
Why not just blur it?
Blur and pixelation look convincing, but they keep information. A blurred word still has the same overall shape, and text set in a known font can be matched against candidates; researchers have recovered pixelated and lightly blurred text this way. Faces can sometimes be recognised through blur, too.
| Method | Hides reliably? | Use for |
|---|---|---|
| Crop | Yes: the pixels are gone | Anything at the edges |
| Solid black box | Yes: the pixels are replaced | Names, numbers, codes, addresses |
| Strong pixelation (large blocks) | Usually, for faces | Faces in a crowd where a box looks odd |
| Light blur | No | Making a background less distracting, not hiding |
Two mistakes that undo the hiding
Covering in an editor that keeps layers. A black rectangle drawn in a design app, a PDF editor or a presentation is often a separate layer on top of the image. If you share the editable file (a PDF, a .psd, a slide deck), the box can be moved and the text underneath is still there. Always export a flat image (PNG or JPG) and share that.
Cropping with a tool that keeps the old data. In 2023, a flaw was found in the markup tool on Google Pixel phones and in Windows' Snipping Tool: when an image was cropped and saved over the original file, the cut-off part could stay at the end of the file and be recovered. Both have been fixed, but the lesson holds: save the redacted version as a new file, and if you are unsure about a tool, re-export the result once with a tool that redraws the image, such as Crop Image or Compress Image.
A final check before posting
- Zoom in to 100% and read every corner.
- Look for the same detail in two places: an email address hidden in the message body may also be in the header.
- Check reflections, profile pictures and anything in the background.
- Ask: if a stranger saw only this image, what would they know about me, my employer or the other people in it?
All the tools above work inside your browser, so the unredacted screenshot never leaves your device on the way to the clean one.
Quick answers
Is a screenshot of a WhatsApp chat safe to share? Only after you cover the other person's name, number and profile photo, unless they agreed to be shown.
Do screenshots have metadata? Usually a little: the device and the time, but not GPS. What's visible matters far more.
Can someone undo a black box? Not if it was saved into a flat image. They can if it was a separate layer in an editable file.
What about screen recordings? Everything above applies to every frame, plus notifications that appear for a second. Turn on Do Not Disturb before recording.
What to do next
Crop with Crop Image, cover the rest with Blur Image's solid box, and frame it with Screenshot Studio if it's going on social media. For photos taken with a camera, which also carry location data, see what your photos reveal.
Try the tool
Blur a whole photo, or blur, pixelate or black out only the areas you select: faces, number plates, names.
Open Blur Image →