What does 4K quality mean?

It means an image about 3840 px on the long edge. That is a pixel count. Real sharpness still depends on the detail in the picture.

Yes. 2160p is the height of a 3840 × 2160 frame, which is 4K. It has twice the width and height of 1080p.

Is 4K or 1080p higher quality?

4K has four times the pixels of 1080p (1920 px on the long edge). More pixels only look better when they carry real detail, which is what the AI adds.

Can I turn this picture into a high quality 4K detail picture?

Yes, if the long edge is at least 960 px. Pick 4K under Output size and this 4K resolution upscaler restores edges and texture. Results vary by photo.

Can I convert an image to 4K resolution online for free?

You can try it: new accounts get 30 free credits once, no card needed, and results carry no watermark. After that, credits come from paid plans on the pricing page.

Can I convert many images to 4K at once?

Yes, select up to 10 images. Each one is its own job and is charged separately, and Download all saves them as one ZIP.

Make this picture 4K in your browser

4K Quality Image Upscaler: Make Any Picture 4K Online

Upscale image to 4K from an original as small as 960 px with this 4K image upscaler. Upload a JPG, PNG or WebP and download a sharp PNG.

New accounts get 30 free credits. Sign-in needed before your first upscale.

Or drop an image here

JPG, PNG, WebP up to 10 MB

What stops 4K quality, and how to fix it

“I tried to get my pic 4K and it just looks blurry, the photo is too small”
At 4×, a 960 px long edge reaches 4K and the AI rebuilds detail, though heavy blur or compression cannot be recovered.
“I don't know how big the image must be for 4K”
The size table below maps 4K to source pixels, and the Output size menu picks 2× or 4× for you.
“The AI made my grandparents' faces look waxy and fake”
Drag the Compare slider to check faces, or use Standard mode for a plain resize, though AI results still vary by photo.
“Free tools add watermarks or hide the download”
Sign up with email for 30 free credits, once, with no card and no watermark.

“The job failed and I lost my credits”
Credits from a failed job come back automatically, though a finished result you dislike is not refunded.

4K quality in pixels: the source size you need

This 4K converter works from pixels. 4K is 3840 px on the long edge, so find your photo's long edge and read across for 2× or 4×.

Output size	Long edge	Source needed at 4×	Source needed at 2×
HD 720p	1280 px	320 px	640 px
Full HD 1080p	1920 px	480 px	960 px
2K	2560 px	640 px	1280 px
4K	3840 px	960 px	1920 px
8K	7680 px	1920 px	3840 px
16K	15,360 px	3840 px	Not reachable

Smaller sources fall short. This 4K image converter greys out a target your photo cannot reach and shows the largest one it can.

How to get 4K quality from a small photo

About 1 to 2 minutes

1
Add your picture
Drop a JPG, PNG or WebP in the upload box to make the image 4K. Large files are shrunk to 3840 px in your browser first.
2
Sign up for free credits
Use email and get 30 free credits. Your image carries over.
3
Set Output size to 4K
The tool picks 2× (10 credits) or 4× (20 credits) and resizes to exactly 3840 px.
4
Compare and download
Drag the Compare slider, then save a PNG or JPG. This 4K picture converter also takes up to 10 images and gives one ZIP.

4K quality questions, answered

What does 4K quality mean?: It means an image about 3840 px on the long edge. That is a pixel count. Real sharpness still depends on the detail in the picture.
Is 2160p 4K quality?: Yes. 2160p is the height of a 3840 × 2160 frame, which is 4K. It has twice the width and height of 1080p.
Is 4K or 1080p higher quality?: 4K has four times the pixels of 1080p (1920 px on the long edge). More pixels only look better when they carry real detail, which is what the AI adds.

Can I turn this picture into a high quality 4K detail picture?: Yes, if the long edge is at least 960 px. Pick 4K under Output size and this 4K resolution upscaler restores edges and texture. Results vary by photo.
Can I convert an image to 4K resolution online for free?: You can try it: new accounts get 30 free credits once, no card needed, and results carry no watermark. After that, credits come from paid plans on the pricing page.
Can I convert many images to 4K at once?: Yes, select up to 10 images. Each one is its own job and is charged separately, and Download all saves them as one ZIP.

Where 4K quality upscaling has limits

Stills only. This 4K image enhancer is not a video converter, so it cannot make a video 4K.
Sources under 960 px on the long edge fall short of 4K, even at 4×.
Heavy blur or extreme compression cannot be rebuilt.
No strength slider, face controls or model choice.
An account is needed: you cannot try it without signing in.

4K Quality Image Upscaler: Make Any Picture 4K Online

What stops 4K quality, and how to fix it

4K quality in pixels: the source size you need

4K quality before and after, upscaled 4×

How to get 4K quality from a small photo

Add your picture

Sign up for free credits

Set Output size to 4K

Compare and download

4K quality questions, answered

Where 4K quality upscaling has limits

Get 4K quality from your photo now