AI Image Upscaler: Upscale an Image to 4K Without Losing Quality
To upscale an image without losing quality, use an AI upscaler instead of a plain resize. A resize stretches the pixels you have and looks soft; an AI upscaler predicts edges and texture at 2× or 4×. The free Image Upscaler runs Real-ESRGAN on your device. Pro AI sends the photo to Google’s Imagen upscaler on Vertex AI, which redraws finer, more natural detail, especially on photos of real scenes.
Image Upscaler: the short answer
- Small graphics, screenshots, game art: the free upscaler usually does well.
- Real photos for print or a 4K screen: Pro AI at 2× (10 credits) or 4× (20 credits).
- Upscaling cannot recover a photo that is badly out of focus.
- For print, aim for 300 pixels per inch of the print size.
What people search for, answered
How do I upscale an image to 4K?
A 4K frame is 3840 × 2160 pixels. A 1920 × 1080 image needs 2×; anything near 1000 pixels wide needs 4×. Open the Image Upscaler, choose 2× or 4× and download. For a real photo, the Pro AI 4× run (20 credits) gives the most natural detail; the free on-device version is fine for graphics.
How do I increase image resolution without losing quality?
Use an AI upscaler, not a resize. Every enlargement has to invent pixels; a resize invents them by blurring between neighbours, while an AI model draws sharp edges and texture. Start from the best copy you have, because compression blocks get enlarged too. The guide to resizing without losing quality explains the limits.
How do I make a low resolution image high resolution?
Upscale it 2× or 4× with AI, then check details such as text and faces at 100 percent zoom. Large shapes come back crisp; letters only a few pixels tall can come back as the wrong letters, so proofread anything you will print.
What resolution do I need to print a photo?
About 300 pixels per inch for a sharp print you hold in your hand: 1800 × 1200 for 6 × 4 inches, 3000 × 2400 for 10 × 8. Posters seen from a distance are fine at 150. The DPI and print size guide has the full table.
Is there an online alternative to Topaz Gigapixel?
For single photos, yes. Desktop upscalers like Topaz are strong but paid and need a capable computer. The free on-device upscaler here runs in a browser, and Pro AI uses Google’s Imagen upscaler on Google’s hardware, so it works the same on a phone.
Why use ImgVX Pro AI for it
- Google’s Imagen upscaler on Vertex AI, built to add believable detail to real photographs rather than to sharpen outlines only.
- 2× or 4× in one run, with 4× priced higher because it is the 4K model on Google’s side.
- Same page, two options: try the free Real-ESRGAN version on your device first, and pay only for the photos that need more.
- Failed runs cost nothing. If Google returns an error or a safety filter stops the image, the credits go straight back to your account.
- No app, no watermark. It runs from the page in any modern browser on a phone or computer, and the download carries no ImgVX watermark. Google adds its invisible SynthID mark to AI images, which is how AI content should be labelled.
Free version or Pro AI?
The Image Upscaler page has two versions of the tool. Try the free one first: if it is good enough, you have spent nothing.
| Free (on your device) | Pro AI (Google Vertex AI) | |
|---|---|---|
| Where it runs | In your browser; the photo never leaves your device | Google Vertex AI; the photo is sent to Google for that run only |
| Model | A compact open-source model | Google Imagen upscaler, or Nano Banana redrawing at 4K |
| Cost | Free with a free account | 10 (2×) or 20 (4×) paid credits a run |
| Best for | Graphics, screenshots, pixel art and photos that only need 2× | Real photos for print, 4K wallpapers, product and property photos |
How to use the Image Upscaler, step by step
- Open the Image Upscaler and choose your image.
- Try the free upscale first and zoom in on the result.
- For more natural detail, go to “Pro AI” under the tool, pick 2× (10 credits) or 4× (20 credits) and press Run Pro AI.
- Download the PNG. Compress it afterwards with the Image Compressor if it is going on a website.
Tips for better results
- Crop first, then upscale: there is no point paying to enlarge the parts you will cut off.
- Photos larger than about 1,500 pixels are scaled to fit before a Pro AI run; very large photos rarely need 4× anyway.
- If the photo is soft rather than small, the AI Photo Enhancer may suit it better.
What it will not do
- It does not recover detail that was never captured. Out-of-focus or shaken photos stay soft, only bigger.
- Tiny text and small faces can be redrawn slightly differently from the original. Do not use an upscaled image as evidence of what small details said.
- Every typed description is checked by our payment provider’s moderation service before Google sees it, and Google’s own safety filters run on every image. Anything in our Acceptable Use Policy (sexual content, anything involving minors, deepfakes, fake documents, removing watermarks) is refused before any credits are used.
What it costs
Pro AI runs on paid credits only, because every run costs us money on Google Cloud: the Image Upscaler uses 10 (2×) or 20 (4×) credits a run. Pro Monthly is $5.90 a month with 300 credits (your first month is $1), enough for about 30 runs. Pro Yearly is $39.99 a year with 4,000 credits. With no subscription, a credit pack of 50 is $4.99 and 200 is $12.99. The free trial credits do not cover Pro AI, and an account’s Pro AI use is capped by what it has paid, so the $1 first month covers only a few runs. See pricing.
Your photo is sent to Google Vertex AI for that run and is not stored by us; we keep a log of the run (tool, time, credits and any text you typed). The privacy policy has the details.
Frequently asked questions
Is the Pro AI upscaler free?
No. The free Image Upscaler on the same page is free. The Pro AI version runs Google’s Imagen upscaler and uses 10 credits at 2× and 20 at 4×; failed runs give the credits back.
Which is better, 2× or 4×?
Use the smallest scale that reaches the size you need. 4× invents more of the picture, so 2× is more faithful when it is enough. More help: ImgVX AI help docs.
Can I upscale a photo for printing on canvas?
Yes. Work out the pixels you need at about 150 to 300 per inch of the canvas, upscale to reach it, and check the result at 100 percent before ordering.
Does upscaling make a blurry photo sharp?
Only if it is blurry because it is small or compressed. A photo that is out of focus stays out of focus. Read how to unblur a photo to tell the two apart.
What file format is the result?
PNG, which keeps every pixel. Convert it to JPEG or WebP with the Image Converter for a smaller file.
Try it on your own photo
Start with the free version on the same page. When you need more, Pro AI is one button below it.