4K Image Upscaler

Enlarge your images up to 4x resolution using AI-powered super resolution technology. Upload any photo or image and get a crisp, detailed enlargement - perfect for printing, social media, or restoring old photos. Supports JPG, PNG, WebP, and BMP formats.

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JPG PNG WebP BMP
Maximum file size: 10MB
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How to Upscale an Image with AI

  1. Upload your image file - we accept JPG, PNG, WebP, and BMP formats up to 10MB. You can also use our Image Resizer to prepare your file first.
  2. Select your desired scale factor: 2x, 3x, or 4x the original resolution.
  3. Choose the upscaling model - "General Photo" for real-world photos, or "Anime / Illustration" for digital art and cartoons.
  4. Pick your output format (PNG for best quality, JPG for smaller file size, or WebP for web use).
  5. Click "Upscale Image" and download your enhanced result. Use our JPG compressor or PNG compressor if needed.

What is AI Image Upscaling?

Unlike traditional image enlargement which simply stretches pixels (resulting in blurry output), AI-powered super resolution uses deep neural networks to intelligently generate new detail as the image is enlarged. The technology analyzes patterns, textures, and structures in your original image to create sharp, realistic details at higher resolutions.

Our upscaler uses Real-ESRGAN (Enhanced Super-Resolution Generative Adversarial Network), one of the most advanced super resolution models available. It produces significantly better results than bicubic interpolation or basic sharpening - especially visible on faces, text, textures, and fine details. It works great alongside our Image Enhancer for maximum quality improvement.

When to Use Each Model

General Photo

Use this for photographs, screenshots, scanned documents, product images, landscapes, portraits, and any real-world content. It handles noise reduction, detail enhancement, and texture reconstruction naturally. Great for preparing images for our Watermark Maker or social media.

Anime / Illustration

Specifically trained for anime-style content, cartoons, digital illustrations, manga, pixel art, and painted artwork. Produces cleaner lines, smoother gradients, and preserves the artistic style. Consider combining with our PNG to SVG converter for vector output.

Tips for Best Results

Image Quality

Start with the highest quality source image you have. While AI upscaling can handle noise and compression artifacts, a cleaner source always produces better output. Use our Image Enhancer first for heavily compressed images.

Scale Factor

For most uses, 2x provides the best balance of quality and speed. Use 4x when you need maximum enlargement for printing or large displays. Keep in mind that 4x will quadruple both dimensions.

Output Format

Choose PNG for lossless quality when detail matters. Use JPG for photos where smaller file size is important. WebP offers a great balance of quality and compression for web use.

Frequently Asked Questions

Traditional resizing (like bicubic interpolation) simply stretches existing pixels, creating blurriness. AI upscaling uses deep neural networks to intelligently generate new detail, textures, and sharpness that didn't exist in the original. The result is a much clearer, more detailed enlargement.

We support JPG/JPEG, PNG, WebP, and BMP input formats. You can choose PNG, JPG, or WebP for output. For other formats, use our image converters first.

You can upload images up to 10MB. For best performance with AI upscaling, we recommend source images no larger than 2000x2000 pixels. Larger images may take longer to process. For quick resizing without AI, try our Image Resizer.

AI upscaling is processed server-side to ensure consistent, high-quality results regardless of your device. Your original image is temporarily uploaded, processed, and the result is sent back. Files are automatically deleted after processing.

Absolutely. AI upscaling is perfect for preparing images for print. Use 4x scale and PNG output format for the best quality. For standard photo prints, a 2x upscale is usually sufficient.

Your privacy matters. Uploaded images and upscaled results are temporarily stored only during processing. All files are automatically deleted within 12 hours. We never share, analyze, or use your images for any other purpose.