Make your own phone wallpaper: ratio, clock space and sharpness
Hunting for the right wallpaper, there's always one thing off. The picture is lovely but the clock covers the face, or the sides get cut off, or it turns blurry when you zoom. Making your own lets you get all three right from the start.
This guide walks through making a wallpaper that fits your phone with a Promptpan wallpaper card. It works for phone cards like the autumn wallpaper, the winter forest watercolor or the cozy winter window. Tap "Phone wallpapers" on the home page to see only wallpaper cards.
1. Start with a 9:16 ratio
Most phone screens are tall rectangles. If the card has a size option, choose 9:16. It's the closest match to a phone screen, so less gets cropped at the sides.
| Where you'll use it | Ratio to choose |
|---|---|
| Phone lock screen and home screen | 9:16 |
| Tablet | 3:4 |
| Computer desktop | 16:9 |
Newer phones with taller screens still crop a little off the top and bottom of a 9:16 image, so keep the important part near the middle. If the card lets you pick your phone model, choose it and the card leaves the right margins.
2. Leave room for the clock and icons
The lock screen puts a big clock at the top, and the home screen covers the picture with icons. A subject sitting right under the clock gets its face covered, and a busy picture makes icons hard to see.
Many wallpaper cards, like the autumn one, are written to keep the clock area clear. If something important still lands there, say so in the same chat:
Keep the top quarter of the screen as plain sky. Leave the rest of the picture as it is.
Move the main subject a little below the center of the screen.
For the home screen, a picture with broad areas of color sits better behind icons than a busy pattern. You can use different images for each: a picture with a subject on the lock screen and a simpler one in the same colors on the home screen.
3. Make it, save it, set it
- Fill the card's fields and choose 9:16. Tap the scene or color options you like.
- Tap the copy button and paste into a new ChatGPT chat. Free accounts can create images, with a daily limit. OpenAI's free tier FAQ
- Open the image full size and save it. Save the original rather than taking a screenshot of the preview, or it will lose sharpness.
- In your phone's wallpaper settings, pick the saved image and drag it into position.
On iPhone, open the image in Photos, then Share โ Use as Wallpaper. On Android, open it in the gallery, then More โ Set as wallpaper. Menu names vary a little by model and version.
4. When it's blurry or odd
| Problem | Try this |
|---|---|
| Blurry when zoomed | Check you saved the original, not a screenshot. If it's still soft, ask for "sharper and more detailed" |
| Sides cut off | Check you chose 9:16 and ask to keep the important parts in the middle |
| Random text appeared | Say "no text in the image" and make it again. If you want words, use the card's text field |
| Too dark | Say "raise the overall brightness a little and keep the composition" |
For wallpapers with words, like quotes or handwriting cards, read every letter. AI image tools still misspell text sometimes.
5. More to try
- Change with the seasons: there are autumn and winter cards. Make a few scenes from the same card so you have one ready when the season turns.
- Use your own photo: some wallpaper cards take a photo. A wallpaper with your pet or yourself in it won't match anyone else's.
- Match your computer: make a 16:9 version in the same mood to pair your phone and desktop.
Frequently asked questions
Can I share a wallpaper I made with friends? Sharing something you made for yourself with friends is fine. Avoid selling or spreading images that imitate famous characters or other people's art.
Will it drain my battery? The image itself barely matters; screen brightness matters far more. On some screens, darker wallpapers save a little.
Can I get several at once? One at a time gives the cleanest results. Ask for another in the same chat until you love it.
The most viewed card this month is a wallpaper too. Pick a scene you like under "Phone wallpapers" on the home page and start there.