The quickest way to brighten or darken a photo
Open the photo in the Photos app, tap Edit in the top right corner, then tap the dial icon (it looks like a circle with lines around it) at the bottom of the screen. Slide your finger left to darken the image or right to brighten it. When you're satisfied, tap Done to save the change.
That single slider controls what iPhone calls Exposure — it brightens or darkens the entire photo at once. If you want more control over specific parts of the image or finer adjustments, iPhone offers additional tools in the same Edit menu.
Key Takeaways
- The Exposure slider (the dial icon) is the fastest way to brighten or darken a photo, and it works on any iPhone model.
- You can also adjust Highlights and Shadows separately to brighten just the bright areas or just the dark areas of a photo.
- All edits are non-destructive — you can undo them or start over without losing the original photo.
- If you want to edit a photo without saving over the original, use the Duplicate option before you tap Edit.
Using Highlights and Shadows for selective brightness
If your photo has a bright sky but a dark foreground, or vice versa, the Exposure slider alone may not give you the result you want. Instead, use the Highlights and Shadows sliders, which are in the same Edit menu below Exposure.
Tap Edit, then scroll down in the adjustment panel until you see Highlights and Shadows. Drag the Highlights slider left to darken the brightest parts of the photo, or right to brighten them. Use the Shadows slider the same way to adjust only the darkest areas. This approach lets you recover detail in a washed-out sky while keeping the foreground properly lit, or brighten a shadowy face without overexposing the background.
Where to find the brightness controls on different iPhone models
All iPhones with iOS 13 or later have the same Edit tools in the Photos app. Open any photo, tap Edit, and you'll see the adjustment icons at the bottom of the screen. The dial icon is Exposure. If you don't see it when ready, swipe left or right across the icons to find it — the order can vary depending on which adjustments you've used recently.
On older iPhones running iOS 12 or earlier, the brightness controls are in a different location. Tap Edit, then tap the three sliders icon (it looks like horizontal lines). From there, you can adjust Light, Color, and B&W separately. If your iPhone is this old, consider updating to the latest iOS version available for your device, which will give you access to the newer, more flexible adjustment tools.
How to undo brightness changes or start over
If you've adjusted the brightness and changed your mind, tap Edit again and then tap Revert at the bottom of the screen. This removes all edits and returns the photo to its original state. You can also tap Cancel before you tap Done to discard changes without saving them.
If you've already saved the edited version and want to go back to the original, open the photo, tap Edit, then tap Revert. iPhone keeps the original file, so you can always restore it. This is true even if you've made multiple rounds of edits — the original is never deleted.
Editing without overwriting the original photo
By default, when you tap Done after editing, iPhone saves the changes to the same photo file. If you want to keep both the original and the edited version, create a duplicate first. Open the photo, tap the three dots in the top right, and select Duplicate. This creates a copy in your Photos library. Now you can edit the duplicate without touching the original.
The duplicate appears right below the original in your library, and both are stored in the same album. You can rename the duplicate to keep track of which is which, or move it to a different album to organize your photos more clearly.
Why a photo might still look dark after you brighten it
If you've moved the Exposure slider all the way to the right and the photo still looks too dark, the image may have been underexposed when it was taken — the camera didn't capture enough light in the first place. In this case, brightening in the Photos app can only do so much. You can try adjusting Shadows to lift the darkest areas, but there's a limit to how much detail can be recovered from an underexposed photo.
For photos taken in very low light, consider using a photo editing app like Snapseed or Adobe Lightroom Mobile, which offer more advanced recovery tools. However, for most everyday photos, the built-in brightness controls in the Photos app are sufficient. If you're taking photos in dim lighting regularly, enable Night mode on your iPhone before you take the shot — this captures more light at the moment of capture, so you won't need to brighten as much afterward.
Frequently Asked Questions
Can I adjust brightness on a photo I took years ago?
Yes. Open any photo in the Photos app, tap Edit, and adjust the brightness. The original file is preserved, so you can always revert the changes. This works on photos from any time period, as long as they're stored in your Photos library.
Does adjusting brightness reduce photo quality?
Slight adjustments have minimal impact on quality. Large adjustments — especially brightening a very dark photo — can introduce graininess or loss of detail. For the best results, make moderate changes and avoid pushing the sliders to the extreme.
Can I adjust brightness on a Live Photo?
Yes. Open the Live Photo, tap Edit, and adjust brightness the same way you would for a regular photo. The brightness adjustment applies to the main frame of the Live Photo. The video portion is not affected.
What's the difference between Exposure and Brightness?
On iPhone, the Exposure slider is the main brightness control. There is no separate "Brightness" slider in the standard Photos app. Exposure adjusts the overall lightness or darkness of the entire image uniformly.
Can I save brightness settings and explore them to other photos?
Not directly in the Photos app. However, if you edit a photo and save it, you can use that edited photo as a reference when adjusting similar photos. Some third-party photo apps offer preset filters or the ability to copy settings from one photo to another.