Waifu2x

Waifu2x is a web-based tool that performs single-image super-resolution for anime-style art using deep convolutional neural networks, and it also supports photographs. It is intended for users who need to upscale or reduce noise in images, particularly artwork, scans, or photos. The service imposes specific limits: a maximum file size of 5MB, noise reduction up to 3000x3000 pixels, and upscaling up to 1500x1500 pixels. Users can select a style from Artwork, Artwork/Scans, or Photo, and choose a noise reduction level ranging from None to Highest, with a note that noise reduction should only be applied if the image actually contains noise to avoid adverse effects. Upscaling options include None, 1.6x, 2x, and 4x, and output formats are PNG or WebP. The website supports multiple languages, including English, Japanese, Russian, and several others. It also includes a CAPTCHA system migrated from reCAPTCHA to Cloudflare Turnstile, uses Google Analytics for improvement, and offers a demonstration and GitHub repository link. The service is supported via Patreon or Fantia.jp.