Free AI Image Upscaler | No Sign-Up, No Watermarks, Up to 16K

AI Image Upscaler

Enhance Your Images with AI Upscaling

Upload an image to have it scaled up to 4x using AI! Images are only visible to you and will be deleted a few minutes after processing. You can upload images up to a size of 16MPx to be scaled to 16k*16k. Note that in times of high demand, it may take a few minutes for your images to be processed.

What model to choose?

Diffuser

Pros:

Very good at restoring poor-quality photos
Very good at upscaling small images
Excellent at producing realistic / natural images
A text prompt can help refine details

Cons:

limited to 4MP (2K)
Slow and expensive
No transparent image support

Additional info:

Hallucination can increase creativity and enhance image quality, detail and sharpness.
It may deviate more from the target image, and if overused, can appear unnatural or overly “AI-dreamy".
Higher hallucination can help if your images are severely blurry or noisy or full of compression artifacts.
Try Plus or General models first, often you get good results for cheap and without long wait.

Plus

Pros:

Very good at upscaling images that are of decent quality
Supports up to 32MP
Best for upscaling art / drawings
Fast and cheap
Supports transparent images
Produces sharp outputs

Cons:

Images can look unnatural or “plastic”, therefore the best use case is upscaling art / drawings

Additional info:

Face Enhance can improve faces

General

Pros:

Supports very large outputs up to 256MP (16k)
Best for upscaling art / drawings
Fast and cheap
Supports transparent images

Cons:

Might not have the best quality compared to Plus or Diffuser
Images can look unnatural or “plastic”, therefore the best use case is upscaling art/drawings

Additional info:

Face Enhance can improve faces

Key Features

Top quality results, including drawings, AI art, anime, photos

100% free for small-scale use — no paywall, no sign-up. A daily free quota applies.

Download as apk for Android: here

Supports common image formats: PNG, JPG, WebP (animated formats like GIF are not supported)

Large image support up to 4096*4096

Scale image 2x / 4x using AI

Restore low resolution photos

Improve blurred / pixelated faces

Supports bulk upscaling

Supports transparent images

Fast and user friendly interface

How It Works

Using this website is incredibly simple — and free:

Upload Your Image: Select an image from your device. Please note that the image size is limited to 16MPx.
You can now select a model and choose the required scale.
Processing: The server will start working on your image. This process usually takes only a few seconds. Your image will be saved and ready for download once it’s done. This algorithm prioritizes quality over speed, so larger images may take longer to process.
Download Your Upscaled Image: Return to the site after a few minutes, and your high-resolution image will be waiting for you in the gallery!
Cleaning Up: Your images will be deleted a few minutes after processing to free up space for new requests.

Comparison Example:

upscaled image before and after comparison

Incredible — isn’t it? You can try this out right now for free here!

Enhance Your Images!

AI Upscaling vs. Traditional Scaling

AI Upscaling:

Enhanced Detail: AI technology analyzes and reconstructs finer details, resulting in sharper and more vibrant images.
Preserved Quality: Unlike traditional methods, AI upscaling maintains the integrity of the original image, avoiding pixelation and blurriness.

Traditional Scaling:

Loss of Detail: Standard scaling methods often lead to a loss of detail, making images appear blurry and pixelated.
Limited Enhancement: Traditional techniques can’t add new details, limiting the quality improvement.

Data safety and copyright

Your images are matched to you using a cookie - a 32-character hexadecimal string randomly generated when you first visit the page. Only with this cookie can an image be accessed.
Your images will be stored until they are processed and a few additional minutes for you to download them.
Your images will not be used in any way other than being upscaled and stored for a short time on this server.
Using this website gives me (the owner) no rights about your images - you are still full copyright holder.
The images are stored on this web server in germany.

AI Image Upscaler

High Resolution Upscaled Images:

Images currently being upscaled:

Images waiting in line for high-quality upscaling:

Thank You!

This upscaler is free, but running it isn’t.

Enhance Your Images with AI Upscaling

What model to choose?

Diffuser

Plus

General

Key Features

How It Works

Comparison Example:

AI Upscaling vs. Traditional Scaling

AI Upscaling:

Traditional Scaling:

Data safety and copyright