waifu2x

Spec sheet

Purpose

waifu2x performs single-image super-resolution for anime-style art and also supports photos.Read 12 Oct 2026 · waifu2x.net

Privacy

The site says it stores images and URLs only for caching, and that the cache expires and is automatically deleted after 30 minutes.Read 12 Oct 2026 · waifu2x.net

Support

The site invites users to support the server through Patreon or Fantia.jp.Read 12 Oct 2026 · waifu2x.net

Account

The privacy policy says the site can be used for free without logging in; Patreon login uses a Patreon user ID and records API call counts for that ID.Read 12 Oct 2026 · waifu2x.net

Analytics and advertising

The site says it uses Google Analytics and Google Adsense, and that third-party publishers may use cookies for personalized advertising.Read 12 Oct 2026 · waifu2x.net

Batch processing

YesRead 20 Sep 2026 · waifu2x.net

Browser limit

The in-browser page indicates that 4x upscaling is not supported there.Read 12 Oct 2026 · unlimited.waifu2x.net

Browser version

unlimited:waifu2x is described as an experimental in-browser version with selectable backend, model, denoising, tiling, TTA, and alpha-channel options.Read 12 Oct 2026 · unlimited.waifu2x.net

Desktop app

YesRead 20 Sep 2026 · waifu2x.net

Desktop availability

The project repository links a Windows installer and installation instructions for Windows, macOS, and Ubuntu.Read 12 Oct 2026 · github.com

Developer use

The project repository says its dependencies include Python 3.10 or later and PyTorch, and links a waifu2x Python API via torch.hub.load.Read 12 Oct 2026 · github.com

Formats

The main site offers PNG and WebP output formats.Read 12 Oct 2026 · waifu2x.net

Hardware

The GitHub README lists an NVIDIA GPU, Torch7, and NVIDIA CUDA among the project dependencies.Read 12 Oct 2026 · github.com

Image processing

The web tool offers artwork, artwork/scans, and photo styles, with selectable noise reduction and upscaling options.Read 12 Oct 2026 · waifu2x.net

In-browser version

The separate unlimited:waifu2x site is described as an experimental in-browser version and lists WebGPU support.Read 12 Oct 2026 · unlimited.waifu2x.net

Input formats

PNG, JPGRead 20 Sep 2026 · waifu2x.net

Input limits

The main site lists a 5 MB file-size limit, 3000×3000 px for noise reduction, and 1500×1500 px for upscaling.Read 12 Oct 2026 · waifu2x.net

Input methods

Images can be selected by drag and drop, entered as a URL, or chosen as a file.Read 12 Oct 2026 · waifu2x.net

Limit on noise reduction

The website advises using noise reduction only when the image actually has noise because it may otherwise cause the opposite effect.Read 12 Oct 2026 · waifu2x.net

Local use

The project's GitHub README documents command-line and self-hosted web-app use, including batch conversion.Read 12 Oct 2026 · github.com

Maintainer identity

The main site links to the nunif GitHub account; the opened pages do not state a headquarters or founding date.Read 12 Oct 2026 · waifu2x.net

Maximum scale

4xRead 20 Sep 2026 · waifu2x.net

Noise guidance

The site cautions that noise reduction can have the opposite effect if the image does not actually contain noise.Read 12 Oct 2026 · waifu2x.net

Noise reduction

The web page offers five noise-reduction settings: None, Low, Medium, High, and Highest.Read 12 Oct 2026 · waifu2x.net

Open source

The original waifu2x repository lists an MIT license and documents command-line tools for noise reduction, 2x upscaling, and batch conversion.Read 12 Oct 2026 · github.com

Output formats

The web tool offers PNG and WebP output formats.Read 12 Oct 2026 · waifu2x.net

Upscaling

The main site offers None, 1.6x, and 2x upscaling, and links to unlimited:waifu2x for 4x upscaling.Read 12 Oct 2026 · waifu2x.net

Upscaling method

aiRead 20 Sep 2026 · waifu2x.net

WebGPU

The in-browser version announced WebGPU support on 2026-08-14.Read 12 Oct 2026 · unlimited.waifu2x.net

Plans and prices

Every waifu2x plan and price →

Where Specifiction places it

• Image Upscaling Software#19 of 998.6