How to brighten a video on iPhone

The Photos app offers several ways to make a clip lighter, and they behave differently. Choosing the one that matches your footage gives a cleaner result than pushing a single slider to its limit.

• Exposure scales the light across the whole frame, much like letting more light reach the sensor. Use it when everything is too dark. Bright parts climb too, so a lamp or window can turn into a white patch; pull Highlights down if that happens.
• Brilliance brightens dark areas while holding back the bright ones. Apple describes it as making an image look richer and more vibrant. It suits mixed scenes, such as a dim room with a bright window behind someone.
• Shadows only works on the darkest tones. It is the gentlest way to reveal detail in a face in shade or a dark corner without touching the sky.
• Brightness is a broader, softer lift that tends to change the middle tones more than the extremes. Try it after Exposure if the clip needs a final nudge.
• Black Point sets where the darkest parts turn fully black. Lowering it lightens deep shadows but greys them out; raising it after a big brightening restores a solid black.

For most dark clips a sensible order is Exposure or Brilliance first, then Shadows, then a small Contrast or Black Point correction. Small moves on two or three settings usually look more natural than a large move on one.

In low light, the iPhone camera boosts its signal to get a picture at all, and that adds noise: random speckles and colour blotches. While the clip is dark the noise hides in the shadows. Brighten it and the noise rises with everything else, which is why a night clip can look sandy after editing.

• Scroll along the Adjust row to Noise Reduction and raise it gradually. It smooths speckles but also softens fine texture, so stop when faces start to look waxy.
• If the image looks flat and milky, the shadows have been lifted into grey. Raise Black Point or Contrast slightly to bring the darkest parts back down.
• If colours look drained after brightening, a small increase in Vibrance or Saturation helps. Large amounts make noise more colourful, not less.
• Aim for a clip where the subject is easy to see, not one that looks like daytime. A night scene that stays a little dark usually looks more convincing.

Some detail cannot come back. Areas that were recorded as pure black, or bright areas that were already pure white, hold no information for any slider to reveal. If a video is too dark to the point of being black, editing can only make the noise more visible.

Photos keeps the original alongside your edit. While editing, use the undo and redo arrows at the top of the screen to step back. After you tap Done, you can still go back: open the edited video, tap the More button, then tap Revert to Original. With iCloud Photos turned on, the edit and the revert both sync to your other devices.

If you filmed several clips in the same dim place, you can reuse one edit. Open the edited video, tap the More button, tap Copy Edits, choose which edits to copy and tap Copy. Then tap Select in your library, pick the other clips, tap the More button and choose Paste Edits.

Many recent iPhones record HDR video, which can use extra brightness on screens that support it. The same clip can look different when it is shared to a phone, app or website that shows it in standard range, sometimes flatter or with a different overall level. Check the edit where it will actually be watched. If you often edit or share clips elsewhere, you can turn off HDR Video in Settings → Camera → Record Video for future recordings.

• Each setting applies to the whole clip. If only the middle of a video is dark, Photos cannot brighten that part alone; a timeline editor such as CapCut can split the clip first (see how to brighten a video in CapCut).
• The screen you edit on changes your judgement. With auto-brightness or Night Shift active, the clip can look brighter or warmer than it really is, so check it again in normal conditions before sharing.
• There is no histogram or waveform for video in Photos, so it is easy to over-brighten without noticing that the brightest parts have turned flat white.

brighten.video runs in your iPhone’s browser or on a computer and works on the file on your device; nothing is uploaded. It suits clips where you want an automatic starting point, more control over noise, or a side-by-side check.

• Tap Select video, then Auto brighten. It measures a few frames and sets the exposure so the middle tones land at a natural level, while keeping a night scene looking like night.
• Or choose a quick fix that matches the scene: Night video, Dim room, Backlit or Slightly dark, and set how strong it is with Strength.
• Turn on Before and after to drag a divider across the frame and compare the two versions side by side.
• Open More options for a Histogram or Waveform, separate Exposure, Shadows, Blacks and Highlights controls, and Noise reduction for grainy footage.
• Tap Export video. When “Your video is ready” appears, tap Share to save it to Photos or Files, or tap Download video.

Like any editor that saves a new file, it re-encodes every frame, so the export is never lossless, and it cannot recover detail that was clipped to pure black or white. Long clips depend on your device’s memory and speed, so a computer may handle them more comfortably. For very dark footage, see the night video enhancer.