To cover sensitive parts of a screenshot on iPhone, open it in Photos, tap Edit, tap the Markup button (the pen tip), and draw over the area with a solid shape or the pen at full opacity. The catch: a simple black box can sometimes be undone, so for anything truly sensitive you must flatten the image so the cover-up becomes permanent pixels.
TL;DR
- iPhone Markup lets you draw shapes and pen strokes over faces or text in a screenshot.
- Use a solid, fully opaque shape, not a translucent highlighter, to hide content.
- A black overlay in some apps can be moved or removed if the file keeps it as a separate layer.
- Saving the edited screenshot in Photos flattens Markup into the image, making it permanent.
- True pixelation or a flattened copy is safer than trusting a single black rectangle.
How do I blur or cover info using Markup?
Markup is built into Photos and is the quickest native option:
- Open the screenshot in Photos.
- Tap Edit, then tap the Markup button (pen tip icon, top right).
- Tap the + button and choose a shape, like the rectangle.
- Place the shape over the face or text, then drag its handles to cover the area.
- Tap the shape, then set its fill to a solid color (black) at full opacity.
- Tap Done, then Done again to save.
For freeform areas, use the pen at maximum thickness and scribble fully over the region until nothing shows through.
What does iOS do natively, and where does it stop?
Natively, Markup gives you opaque shapes and pen strokes, and when you save the screenshot, those marks are baked into the final image. That flattening is the important part: once saved in Photos, the cover is part of the pixels, not a removable sticker. Where it stops: Markup has no true blur or pixelate tool. The marker "highlighter" is translucent and does not hide anything, and the standard shapes are hard edges, not the soft pixelation you may want for faces. So the protection is only as good as your opacity and your save step.
Why isn't a black box always enough?
This is the most common mistake. If you place a black box but the editing tool stores it as a separate layer or an overlay (common with some PDF editors, document apps, and certain web tools), the underlying content is still in the file. Someone can move the box, delete the layer, or extract the original. On iPhone, saving a Markup edit in Photos flattens it, which is safe, but copying a "redacted" file out of an app that kept layers is not. When in doubt, screenshot your redacted result one more time, so the cover-up is captured as flat pixels with nothing behind it.
How do I pixelate properly instead of using a box?
A solid box clearly signals "something was hidden here." If you want a cleaner look or extra certainty, pixelate the region with a dedicated tool that rewrites the pixels themselves, then export a flattened image. Because the original pixels are destroyed, not merely covered, there is nothing underneath to recover. A browser-based privacy tool can do this locally so the screenshot never leaves your device.
What this cannot do
Blurring or boxing protects only what you cover. It will not catch a reflected name in a window, a partial username at the screen edge, or text you forgot was in a notification banner. Light blur can sometimes be partially reversed, and pixelation that is too coarse can still leak the shape of large text, so cover generously. And none of this helps if you have already sent the unedited version; redact first, then share.
FAQ
Can a blurred screenshot be unblurred?
A heavy, flattened blur or proper pixelation is effectively permanent because the original pixels are gone. A light blur or a movable overlay layer can sometimes be reversed or removed, which is why you should flatten the image and cover sensitive areas generously.
Does iPhone Markup have a blur tool?
No. Markup offers shapes, a pen, and a translucent highlighter, but no blur or pixelate option. Use a solid opaque shape to hide content, or a dedicated pixelation tool when you want a softer, irreversible result.
Is the highlighter safe for hiding text?
No. The Markup highlighter is semi-transparent, so the text underneath stays readable. Always use a fully opaque shape or pen at full opacity to actually conceal information.
Redact images privately with Cleanor's privacy tools, or keep your photo library tidy with Cleanor for iPhone. If your storage is tight, see what's actually using your iPhone storage.