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

AI Image Upscaler

What model to choose?

SeedVR2

Pros:

Very good at upscaling all types of images
Produces more realistic textures
Supports outputs up to 8MPx

Cons:

No transparent image support
Slightly more expensive compared to plus / general models
Sometimes struggles with detailed structure

Additional info:

High upscale ratios (for example, 6MPx from a 200x200px image) increase the risk of structural artifacts and can introduce blur.
Use SeedVR2-3b first to establish a strong, structurally accurate upscale, then pass it through the Diffuser at 1x to refine it with realistic micro-textures. This combination often gives the best results.

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:

Image detailes like hair can look unnatural or “plastic” from too strong deblur, 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

Diffuser

Pros:

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

Cons:

limited to 6MPx
Slow and expensive
No transparent image support
Struggles with detailed structure at high upscale ratios, malformed hands / fingers are common

Additional info:

Can restore poor-quality / blurry images at 1x without upscaling. Use this if your image is already large enough but blurry / poor-quality.
Can be used to post-process SeedVR-3b outputs at 1x scale to refine texture.
You can help the model understand your image with a text description. If you provide no description, the program will auto-generate one for you.

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 processing

Supports transparent images (plus / general model)

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. You can use the button or drag & drop files on the preview image.
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

Your images are currently being upscaled

Your images are waiting in line for high-quality upscaling

Thank You!

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Enhance Your Images with AI Upscaling

What model to choose?

SeedVR2

Plus

General

Diffuser

Key Features

How It Works

Comparison Example:

AI Upscaling vs. Traditional Scaling

AI Upscaling:

Traditional Scaling:

Data safety and copyright