How big will a 4K PNG file be?

Usually 5-20 MB, depending on detail. PNG is lossless, so busy photos produce larger files than flat graphics.

Should I upscale or vectorize my logo?

Upscale when you need a bitmap at a fixed size, such as a 4K wallpaper. Vectorize with the PNG to SVG tool when you need it at many sizes, such as print and signage.

How does AI image upscaling work?

A neural network (ESRGAN) predicts the missing detail when an image is enlarged, instead of just stretching pixels. It runs on your own device, so the image is not uploaded anywhere, and the first run downloads about 5 MB of AI engine.

What is the difference between 2x, 4x and 8x?

The factor multiplies width and height. 4x turns a 1000×1000 image into 4000×4000 (16 times the pixels). Higher factors need cleaner sources to look good.

What do denoise and color boost do?

Denoise lightly smooths compression grain before upscaling, and color boost lifts saturation and contrast for flat photos.

Is there a maximum output size?

Output is capped at 8192 pixels on the longest side. The AI step works on images up to about 768 px on the longest side (384 px on phones). Larger photos are reduced first and any extra size is added with standard enlargement, so the AI helps most on small or low-quality images.

Upscale PNG to 4K with AI

Turn a small PNG into a sharp 4K-class image. The 4x preset is already selected: drop your PNG file and start.

Drag & drop an image here

or click to browse · JPG, PNG, WebP · up to 25 MB

About Upscale PNG to 4K

When to use it

4K (about 3840 px wide) is the usual target for wallpapers, large monitors and A3 prints. Start from a source of about 1000 px for a 4x result.

What to know

PNG keeps lossless detail and transparency, which makes it the best source for logos, screenshots and pixel art. The result downloads as PNG.

Pro tip

Raise colour boost to 15-25% for flat-looking photos, and keep denoise low on clean images so fine texture survives.

Upscaling a PNG to 4K

A 4x upscale takes a 960 × 540 PNG to 3840 × 2160 (4K UHD). PNG sources are ideal for this jump because there is no lossy compression to magnify. Good candidates are game screenshots, digital paintings, renders, charts and logos you want to use as a 4K wallpaper or in a 4K video.

Flat colour areas, gradients and clean edges upscale especially well from PNG. If the PNG was itself made from a JPG at some point, it may still contain old JPG artefacts. In that case raise denoise to 20-30% to clean them up first.

Logos and icons with transparent backgrounds keep their transparency. If you need the logo at any size at all, for example on a large banner, the Image to SVG tool may be a better choice than a very large PNG.

How to use the Upscale PNG to 4K tool

1
Drop your image into the upload zone.
2
Pick 2x, 4x or 8x and tune denoise and colour boost.
3
Click Upscale, watch the progress, then download the result.

Why use this Upscale PNG to 4K tool?

2x, 4x, 8x

Choose the enlargement that fits your print or screen.

Quality controls

Denoise and colour boost applied in one pass.

Live progress

See every stage of the pipeline with a real-time percentage.

Upscale PNG to 4K: frequently asked questions

How big will a 4K PNG file be?: Usually 5-20 MB, depending on detail. PNG is lossless, so busy photos produce larger files than flat graphics.
Should I upscale or vectorize my logo?: Upscale when you need a bitmap at a fixed size, such as a 4K wallpaper. Vectorize with the PNG to SVG tool when you need it at many sizes, such as print and signage.
How does AI image upscaling work?: A neural network (ESRGAN) predicts the missing detail when an image is enlarged, instead of just stretching pixels. It runs on your own device, so the image is not uploaded anywhere, and the first run downloads about 5 MB of AI engine.
What is the difference between 2x, 4x and 8x?: The factor multiplies width and height. 4x turns a 1000×1000 image into 4000×4000 (16 times the pixels). Higher factors need cleaner sources to look good.
What do denoise and color boost do?: Denoise lightly smooths compression grain before upscaling, and color boost lifts saturation and contrast for flat photos.
Is there a maximum output size?: Output is capped at 8192 pixels on the longest side. The AI step works on images up to about 768 px on the longest side (384 px on phones). Larger photos are reduced first and any extra size is added with standard enlargement, so the AI helps most on small or low-quality images.