Ultrawide and 4K wallpapers
Pick 21:9 for an ultrawide monitor, 16:9 for a regular desktop or 9:16 for a phone, and generate at 4K so the image stays sharp across the whole screen.
Models
Images (Optional)
Prompt
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Not sure what to write? Try an example:
Seedream 5.0
ByteDance's Seedream 5.0 Lite for images that need to be big: posters you print, desktop and phone wallpapers, wide website banners. Choose 2K, 3K or 4K, use wide or tall ratios, and add reference photos to build one scene from several.
What Is ByteDance Seedream 5.0 Lite?
Seedream 5.0 Lite is the standard release from ByteDance's Seed team in early 2026. It creates images from a text prompt or from your own photos and exports them at 2K, 3K or 4K, which is the main reason to pick it on this site. A picture made for a phone screen often looks soft once it is printed as a poster, stretched across a 4K monitor or used as a full-width website banner; starting at a larger size avoids blurry upscaling later. It also handles wide and tall ratios such as 21:9 and 1:2, and it can take several reference photos at once, so you can place a person, a product and a location into one scene. Use 2K to try ideas, then generate the final version at 4K when it is going on a wall or a big screen.
What it does well
Core Capabilities
Built for workflows where resolution and aspect ratio matter as much as prompt fidelity.
Choose 2K, 3K or 4K
Try ideas at 2K, then make the final image at 4K for prints, large screens and anything people will look at up close.
Wide and tall formats
Go from square to ultrawide 21:9 or a long 1:2 vertical, so banners, wallpapers and story images need little or no cropping.
Several reference photos in one image
Upload a location, a person and a product, then say where each one goes. The result keeps them recognizable in one shared light.
Short titles that read correctly
Headlines, shop names and dates in quotes come out clean enough for posters and signs, especially at 3K and 4K.
4K Output Examples
Three jobs where a small image would fall apart: an ultrawide screen, a printed poster and a scene assembled from several photos.
Print-Ready Posters
Put the title and date in quotes, choose a portrait ratio and 4K, and send the file to a print shop or office printer. Read the words at full size before you order prints.
Combine reference photos into one scene
Upload the place, the person and the object separately and describe how they fit together. Useful for campaign mockups, room ideas and storyboards when no single photo has everything.
Three steps
How to Generate Online
Step 011. Add reference photos or skip them
Upload the photos you want to build on, here a lakeside cabin. To create an image from words only, leave the upload area empty.
Step 022. Describe the image and pick a size
Choose a preset or write your own prompt, then set the ratio for where the image will be used and pick 2K, 3K or 4K.
Step 033. Check the details, then download
Zoom in on edges, faces and any text. When the 2K draft looks right, run the same prompt at 4K and download the large version.
Who It Helps
People who need an image to stay sharp on paper, on big screens or after cropping into several sizes.
Small businesses printing posters
Make flyers, window posters and price signs at 4K so the photo and the title stay crisp at A3 size and up.
Wallpaper makers
Create desktop, ultrawide and phone wallpapers in the exact shape of the screen, without stretching a smaller picture.
Website and landing page builders
Generate full-width hero banners that still look sharp on high-resolution laptops and large monitors.
Online sellers with many listing sizes
Start from one large lifestyle image and crop square, portrait and banner versions from it without losing detail.
Event and wedding planners
Make welcome signs, backdrops and table cards that hold up when printed on large boards or fabric.
Designers building mockups
Combine the client's location, product and model photos into one draft scene before booking a real shoot.
2K · 3K · 4K · Wide formats · Multiple references
Create Large, Sharp Images With Seedream 5.0
Describe the image or upload your photos, choose the shape and size, and download a 4K file ready for print or a big screen.
Frequently Asked Questions
Answers covering resolution choices, print output, multi-photo blending, credits, and licensing.
Use this model on this site when you need a large image: posters and flyers for print, wallpapers for desktop, ultrawide and phone screens, full-width website banners, and scenes built from several reference photos. It also writes short titles in quotes well enough for signs and posters. For dense infographics or long blocks of text, use a model built for that.
All three are from ByteDance and all three are on this site. Choose Seedream 5.0 Lite when you need 3K or 4K output, very wide or tall formats, or several reference photos combined at a low credit cost. Choose Pro for infographics, menus and text in many languages, or to edit a photo by marking the spot. Choose 5.5 for transparent backgrounds and small edits that leave the rest of the photo untouched. Pro and 5.5 export up to 2K.
Use 2K while you try prompts and layouts; it is the cheapest and the quickest to come back. Use 3K for website banners and images viewed on laptops. Use 4K for anything printed, shown on a 4K or ultrawide monitor, or cropped into several smaller versions later. Larger sizes take a little longer, so settle the idea at 2K first, then run the same prompt at 4K.
Generate it again at 4K in the same shape as the paper: 3:4 or 2:3 for most portrait posters, 4:3 or 3:2 for landscape. Avoid making a small image and enlarging it in another app, since that only stretches the pixels. Keep the title large in the prompt, leave space around it, and check the file at full size before you pay for prints.
Upload up to four photos and refer to them by order in the prompt, for example "the lake from image 1, the woman from image 2, the canoe from image 3". Say where each one goes and what should stay the same, such as a face, a logo or a product color, and ask to match the light across the scene. Clear photos with one main subject each give the most reliable result. Set the ratio to auto to follow the shape of your first photo, or pick a ratio yourself.
Put every word you want inside quotes, keep each line short, and add "No other text" at the end of the prompt. Titles of one to five words work best; long sentences and tiny captions are where errors appear. Generating at 3K or 4K helps small letters come out cleaner. If one word is still wrong, run it again or edit only that word in the next round.
You can try it for free. New users get free trial credits after signing in, with no credit card required. 2K costs 3 credits, 3K costs 4 and 4K costs 5; the generate button shows the cost before you start, and uploading reference photos costs nothing extra. Free results come one at a time with a watermark, while paid credits or a subscription remove it and allow up to four images per run. Failed generations are refunded automatically.
Yes. You can use what you create here on posters, websites, listings, ads and client work, as long as you hold the rights to the photos and logos you upload and the people in them have agreed to appear. Your uploads and results are private to your account: they are never shown publicly, never used for public AI training, and you can download or delete them at any time.
