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Resize to 3840×2160.

True 4K resolution. The highest standard for screens.

or drop an image here

JPG, PNG, WebP, HEIC, AVIF, GIF · Up to 15MB free

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The problem

4K displays require 3840×2160 pixels. Upscaling a lower-resolution image with a standard resize just creates a blurry result — you need AI to fill in the missing detail.

The fix

Upload your image. Set 3840×2160 as the target. Use AI Enhance (Pro) to generate true 4K detail rather than just stretching pixels. Download a crisp 4K image.

How it works

Exact output: 3840×2160 pixels (4K UHD)
AI Enhance generates genuine detail at 4K
16:9 aspect ratio matches 4K displays
Up to 8K with Pro

FAQ

What is 3840×2160 resolution?
3840×2160 is 4K UHD (Ultra High Definition) at a 16:9 aspect ratio. It contains 4× the pixels of 1080p (1920×1080) and is the standard for 4K TVs, monitors, and displays.
Can I upscale an image to 4K without it looking blurry?
Standard resizing just stretches pixels and creates a blurry result. AI Enhance uses super-resolution to generate additional detail, producing a genuinely sharp 4K output.
What file size does a 4K image produce?
A 3840×2160 JPEG at high quality is typically 3–8MB. PNG at the same resolution can be 15–30MB. WebP offers the best compression — usually 2–4MB at comparable quality.
Is 4K the same as UHD?
Near enough for most purposes. True 4K cinema is 4096×2160. Consumer 4K UHD is 3840×2160 (16:9). Both are called '4K' in common use.

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