AI Image UpscalerNew

How to upscale an image

1. Drop your design or photo. You’ll see its size now and how big it can print at 300 DPI.
2. Pick 2× or 4× (4× turns a 1000 px design into 4000 px) or Print size: choose a T-shirt, a poster size and DPI, or type an exact size in pixels.
3. Click “Upscale with AI” and wait a few seconds to a few minutes, depending on the size and your computer. You’ll see the time left.
4. Compare the result with a normal resize, then download it. You’ll see the file size first: JPG for photos and posters (much smaller), PNG when you need transparency.

When print-on-demand sellers need an upscaler

Print partners like Printify, Printful and Gelato want big files — often 4000 px or more for a shirt or poster — and a design that’s too small prints soft or gets rejected. That happens a lot with designs made in Canva at screen size, AI-generated art (often 1024 px), clip art bundles and older files.

• AI art from Midjourney, DALL·E or similar usually comes out at 1024–2048 px. A 4× or 2× upscale gets it to print size.
• Logos and text keep sharper edges than with a normal resize.
• Mockups and listing photos that are too small for Etsy’s 2000 px zoom can be brought up to size.

Need a vector instead?

Upscaling gives you a bigger image made of pixels. Logos, line art and designs for cutting machines (Cricut, vinyl, laser) often work better as a vector, which stays sharp at any size. Vectacle turns PNG and JPG images into clean SVG vectors — from the makers of Scaylr.

Upscale to print size

“Print size” does the maths for you. Pick what you’re selling and the tool works out the exact pixels, runs the AI 2× or 4× (for very small images, a smooth enlarge first and then the AI 4×), and finishes with a high-quality resize to the exact size. It shows which part is AI and which is a normal resize, and the DPI your file will print at. The DPI is saved in the downloaded file too.

• T-shirt or hoodie front: 4500 × 5400 px (15 × 18 in at 300 DPI), the size Printify and Printful ask for.
• Posters and wall art: 8 × 10 to 24 × 36 in, and A4 to A2, at 300 DPI (sharpest) or 150 DPI (fine for big posters seen from a distance). A 24 × 36 in poster at 300 DPI is 7200 × 10800 px.
• Any other size: type the width and height in pixels, up to 12,000 px.

If your design is a different shape from the print, “Fit” keeps all of it and adds transparent space around it; “Fill” covers the whole print and crops the edges.

Not sure if you need it? Check your file with Is My Design Ready? or the DPI calculator first.

Already have enough pixels and only need the file to say 300 DPI? Change the image DPI instead — no upscaling needed.

Making a file for a print-on-demand product? Make it print-ready: the exact Printful, Printify or Gelato size, bleed, a transparent background and a print check in one go.

FAQ

How does the AI upscaler work?

It uses Real-ESRGAN (the “general x4v3” model), a neural network trained to rebuild detail when an image is enlarged, instead of just stretching the pixels. Text, line art and flat colours come out much crisper than with a normal resize; on painted artwork, outlines can turn out a little darker. It runs on your own computer’s graphics chip through TensorFlow.js.

Is my image uploaded to a server?

No. The AI model is downloaded to your browser once (about 2.4 MB) and your image is processed on your own device. Nothing is uploaded, and it’s free with no sign-up.

How big can the result be?

Up to 12,000 px on the longest side in Chrome, Edge or Firefox on a computer — enough for a 24 × 36 inch poster at 300 DPI (7200 × 10800 px) or a 4500 × 5400 px T-shirt print. Safari on iPhone and iPad allows less (about 4096 px); the tool checks what your browser can handle before it starts.

What does “Upscale to print size” do?

Pick a print size — a T-shirt front, a poster from 8 × 10 to 24 × 36 inches, or A4 to A2, at 300 or 150 DPI — or type any size in pixels. The AI enlarges your image 2× or 4× to rebuild detail (a very small image is first enlarged smoothly, so the AI 4× lands on the size), and a normal high-quality resize then brings it to the exact pixel size. The tool shows which part is AI and which is the resize, and saves the DPI in the downloaded file.

Will it make a blurry design print-ready?

It helps a lot with small or slightly soft designs, especially illustrations, text and logos. It can’t invent detail that was never there, so a tiny, heavily compressed image will still look soft. Check the result with Is My Design Ready? before you upload it to your print partner.

Does it keep transparent backgrounds?

Yes. If your design has a transparent background, the download is a PNG, which keeps it (WebP keeps it too). JPG has no transparency, so it’s only the default for pictures without see-through parts.

Why does it download a JPG and not a PNG?

Because of the file size. A 10,000 px PNG of a photo can be over 100 MB — far over Etsy’s 20 MB limit for digital downloads and even Printify’s 100 MB upload limit. A high-quality JPG (quality 92, full colour detail) of the same picture is usually 10–25 times smaller and prints the same. So pictures without transparency download as JPG by default. You can still pick PNG, a smaller PNG with up to 256 colours for flat art like logos and text, or WebP. The tool shows the size of each before you download and saves the DPI in every file.

Why is it slow on my phone?

The model does millions of calculations per image. A laptop or desktop with a graphics chip is usually 5–20× faster than a phone. A 1000 px design at 4× takes about 15–30 seconds on a recent laptop; a 24 × 36 inch poster at 300 DPI takes one to a few minutes. Keep the tab open and in front while it works.