ImageUpscaling.net

ImageUpscaling.net is a free web AI upscaler needing no sign-up. It offers four models (SeedVR2, Plus, General, Diffuser), 2x and 4x scaling, face restoration, bulk processing and outputs up to 16K, funded by donations with a daily free quota.

ImageUpscaling.net is a web-based AI upscaler that enlarges low-resolution images without requiring an account. Users upload one or more files, pick a model and a scale factor, and download the enlarged results from an on-page gallery. The service handles PNG, JPG and WebP files up to 4096 by 4096 pixels, and it offers 2x and 4x scaling, with the General model reaching outputs of up to 256 megapixels (16K). The tool stands out for how openly it explains its model choices. SeedVR2 is described as a strong all-rounder with realistic textures and outputs up to 8 megapixels. Plus is positioned as a fast, inexpensive option for art and drawings, supporting transparency and up to 32 megapixels. General targets very large outputs and also suits illustrations. Diffuser is built for restoring blurry or poor-quality photos, accepts an optional text prompt to guide detail, and can even run at 1x to clean up an image without enlarging it. The page also suggests chaining SeedVR2 with Diffuser at 1x for refined micro-textures. Optional face restoration helps when faces come out distorted, and WebP output is recommended for much smaller downloads. In practice the service is aimed at casual users, illustrators, anime and AI-art fans, and anyone rescuing old or pixelated photos. A daily free quota applies, and during busy periods requests queue, with paying supporters served first. The project is donation-funded and run by an individual operator in Germany. Uploaded images are tied to the visitor by a random cookie, are removed a few hours or minutes after processing, and remain the user's copyright. Bulk processing and an Android app are available. Compared with subscription-based desktop upscalers or large editing suites, this is a lightweight, no-friction alternative. The tradeoffs are queue times, quotas and a narrower feature set, since it focuses on upscaling rather than broader photo editing.