You can change a YouTube thumbnail on your phone in about a minute, on both iPhone and Android, without opening a laptop. It works on any video you own, including old ones, and it doesn't touch your views or comments. Here are the exact steps for the two apps that offer it, plus what to prepare and what to do when the option is missing. To change YouTube thumbnail on phone for a Short, see the note further down, because the rules differ.
What to prepare first
- The new image saved in your phone's photos, as a JPG or PNG.
- The right shape: 16:9, at least 640 pixels wide, with 1280 by 720 pixels a safe choice.
- A small file: up to 2 MB when you upload from the mobile app, per YouTube's Help Center.
- A verified channel. Custom thumbnails need phone verification. Without it you can only pick an auto-generated frame.
Not sure your file meets those limits? Check it in your phone's browser with our thumbnail size checker.
Method 1: change YouTube thumbnail on phone with the Studio app
This is the easiest way, and the steps are the same on iPhone, iPad, and Android.
- Open the YouTube Studio app and tap Content in the bottom menu.
- Tap the video you want to change.
- Tap the edit (pencil) icon, then tap Edit thumbnail.
- Choose an auto-generated frame, or tap Custom thumbnail and pick your image.
- Confirm your choice, tap Select, then tap Save.
Method 2: change YouTube thumbnail on phone from the YouTube app
If you don't have the Studio app, you can do it from YouTube itself.
- Open the YouTube app and tap your profile picture.
- Tap Your videos, then find the video.
- Tap the three-dot More menu next to it, then Edit.
- Tap Edit thumbnail and choose or upload an image.
- Save your changes.
The menu names can change slightly between app versions. If a button isn't where you expect it, look for the pencil or Edit icon on the video.
Changing a thumbnail on a Short from your phone
For Shorts, the app lets you pick a frame from the video. Uploading a custom image to a Short is done in YouTube Studio on a computer, and it's still rolling out to more channels. Our Shorts thumbnail guide has the details.
If the option is missing or greyed out
- Verify your channel. This is the most common reason. See what to do when you can't upload a custom thumbnail.
- Update the app. Older versions can hide options.
- Try a computer. Some options are easier or only available in the browser version of Studio.
- Check for an error message. If you see "your thumbnail could not be edited," read the fixes for that error.
If you can't verify with a phone number
Without verification you can't upload a custom image. You can still choose one of the auto-generated frames, so pick the sharpest, best-lit frame you can find. Verification is worth doing if you upload regularly, because a designed thumbnail almost always beats a random frame.
After you change it
The fastest way to change YouTube thumbnail on phone is the Studio app, so keep it installed.
- Give it time. The new image can take a few minutes, and sometimes longer, to show everywhere. See how long it usually takes.
- Measure the result. Note your click-through rate before, wait for enough impressions, then compare. Our guide to checking thumbnail CTR in YouTube Studio shows where to look.
- Change one thing at a time so you know what worked. See how to change a YouTube thumbnail and tell if it helped.
Making the new thumbnail on your phone too
You can also design it on your phone with a free app. Read how to make a YouTube thumbnail on phone for a step-by-step workflow.
Frequently asked questions
How do I change a YouTube thumbnail on iPhone?
Open the YouTube Studio app, tap Content, choose the video, tap Edit, then Edit thumbnail. Pick a frame or a custom image, and save.
How do I change a YouTube thumbnail on Android?
The steps are the same as on iPhone. Use the Studio app, or the More menu next to the video in the YouTube app.
Can I change YouTube thumbnail on phone after posting?
Yes. You can change it at any time, and your views, likes, and comments stay.
Why can't I upload a custom thumbnail on my phone?
Usually the channel isn't verified, the file is over 2 MB, or the format isn't JPG or PNG.
Want to know whether your new image is better than the old one? Get a free score before you upload it.
