What is waifu2x?
waifu2x is one of the best-known free image upscalers on the web. It uses deep convolutional neural networks to enlarge images and clean up noise and JPEG artefacts. It was built for anime-style artwork, which is where the name comes from, but it also has a mode for photos.
The site is run by the developer nagadomi and is based on the open-source nunif project on GitHub. You upload a picture, pick a style, a noise reduction level and an upscale factor, and download the result as PNG or WebP. The old waifu2x.udp.jp address now redirects to waifu2x.net, and a separate unlimited.waifu2x.net version handles 4x upscaling in your browser.
Main Features
- Styles for artwork, artwork scans and photos
- Noise reduction from none to highest
- Upscaling at 1.6x, 2x or 4x
- PNG or WebP output
- Files up to 5MB, with no sign-up
- Open source, based on the nunif project
How to Get Started with waifu2x
- Go to waifu2x.net and choose an image file.
- Pick the style that matches your image: Artwork, Artwork/Scans or Photo.
- Set the noise reduction level and the upscale factor.
- Click the button to convert, then save the result.
waifu2x Pricing
waifu2x is completely free with no paid plan. The developer accepts optional support through Patreon and Fantia to cover server costs.
Who Should Use It?
- Anime and manga fans enlarging wallpapers
- Artists cleaning up small or compressed images
- People restoring old low-resolution pictures
- Anyone who needs a quick free upscaler
waifu2x Alternatives
- Magnific AI: AI upscaler that adds new detail as it enlarges images.
- Remini: Photo enhancer known for sharpening faces and old photos.
- Clipdrop AI: Set of AI image tools including an upscaler and cleanup.
Frequently Asked Questions
Is waifu2x free?
Yes. waifu2x has no paid plan or sign-up. It is funded by voluntary donations.
What are the file limits on waifu2x?
The web version accepts files up to 5MB, up to 3000x3000 pixels for noise reduction and up to 1500x1500 pixels for upscaling.
Does waifu2x work on photos?
Yes. It was made for anime art, but it also has a Photo style for real photographs.