AI Upsampling (Super Resolution) Tool

Drag & drop image here

*AI processing may take from a few tens of seconds to several minutes depending on your device's performance.

Or try with a sample image

This is a free tool that uses the latest AI (Artificial Intelligence) technology, "Super Resolution (Real-ESRGAN)," to beautifully upscale image resolution up to 4x directly in your browser. Unlike typical cloud-based tools, there is no need to upload your images to an external server. You can use it safely and without any usage or quantity limits. This tool utilizes a technology called "Edge AI" to process everything entirely on your device (smartphone or PC), making it highly secure and innovative.

✓ Features and Strengths of this Tool

Two Specialized AI Models: Equipped with "For Photos & Landscapes (Real-ESRGAN-General)" for natural sharpness, and "For Anime & Illustrations (Real-ESRGAN-Anime)" for smooth lines and colors. It beautifully enlarges images up to 4x using the optimal processing for your subject.
AI Restores Details Even for Rough Images: Prevents the "blurring" and "jaggies" that occur with traditional stretching (like bilinear interpolation). The AI infers and adds lost pixel information, resulting in a high-definition finish.
Zero Risk of Information Leak with 100% Local Processing: Your image data is never sent to or stored on an external server. You can safely enhance highly confidential business documents or private photos without any worries.
Format Output Tailored to Your Needs: You can choose between "PNG format" to save the beautiful AI-generated image without any quality loss, or "JPEG format" to reduce the file size for web usage.

Why Free & Unlimited? The Magic of "Edge AI" in Your Browser

Image upscaling (Super Resolution) requires massive computational power. However, this tool adopts an "Edge AI" architecture that runs directly in your browser, realizing advanced technical benefits:

■ High-Speed Inference via ONNX Runtime Web and WebAssembly

By leveraging "ONNX Runtime Web" to execute the standard machine learning format in the browser, along with "WebAssembly (Wasm)" for near-native performance, we successfully run high-performance super-resolution models (Real-ESRGAN) completely serverless.

■ Memory Optimization via Proprietary "Patch Splitting & Blending"

Processing a huge image all at once would crash the browser. To solve this, the tool automatically divides the image into small blocks (patches) for inference, and uses a proprietary TypeScript algorithm to smoothly blend the edges when stitching them back together.

■ "Completely Free & Unlimited" Thanks to Serverless

Because we don't process images on our servers, there are no expensive GPU server maintenance or bandwidth costs for us. This is the biggest reason we can continue to offer an advanced AI tool with "no user registration," "no usage limits," and "completely free of charge."

How to Use & Tips

Load an Image
Drag and drop an image into the dotted area on the screen, or click to select a file. Once loaded, the screen will switch to the preview.
Select a Model and Execute AI Processing
Choose the appropriate model ("For Photos & Landscapes" or "For Anime & Illustrations") for your image, and click the "Upscale Image" button. Only on the first run, it will take some time to download the AI weights (several tens of MB).
Check the Result and Download
When the calculation (patch processing) is complete, the 4x upscaled and high-definition image will appear on the canvas. If you're satisfied, select the save format (PNG or JPEG) and click the "Download" button to save it.

Recommended Use Cases

🎨 Upscaling Illustrations & AI-Generated Art

Beautifully enlarge small illustrations you drew in the past or low-resolution images generated by AI. By using the Anime model, you can upscale them to a size suitable for printing or posters (4K level) while keeping the lines and colors perfectly smooth without jaggies.

📸 Restoring Old Photos & Low-Res Materials

Sharply restore noisy photos taken with old smartphones or low-resolution material images found on the web. Using the Photos & Landscapes model revives the details, making them fully usable for presentation slides or website main visuals.

Frequently Asked Questions (FAQ)

The processing takes a long time while stuck on "Calculating..."

AI super-resolution processing requires a massive amount of calculation compared to standard image editing. Since this tool relies on the performance of your device (PC or smartphone), it may take several minutes depending on your hardware specs (CPU/GPU) and the size of the original image. Please wait without closing the browser tab.

What is the "AI model (weight) download" on the first run?

When running for the first time or switching to a different model, the browser downloads the AI's "brain" data (approx. 10MB to several tens of MB). Therefore, you may need to wait for a few tens of seconds depending on your internet connection. From the second time onward, the data is cached in your browser, so processing will start immediately.

Can I use it on smartphones or tablets?

Yes, you can operate it from standard browsers like Safari and Chrome. However, AI upscaling consumes a large amount of memory (RAM). Trying to process large images on devices with low memory, like some smartphones, may cause the browser to crash. For stable performance, we strongly recommend using a PC environment.

Which save format (PNG or JPEG) should I choose?

If you "do not want to lose any quality" from the high-quality AI output, or if you "want to keep the transparent background," please choose PNG format (though the file size will be larger). If you want to "reduce the file size while maintaining good image quality" for posting on websites, we recommend JPEG format.