RENDERMAGE
AI Video Studio
Upscale your walkthroughs, flyovers, and renders to 4K using browser-based AI upscaling. Completely free, no registration or GPU configs required. This is a quick, free no-nonsense tool for upscaling videos with AI right in the browser. There is no software to install, and no registration or sign up required. All you need to do is input a video, and your browser will do all of the AI Upscaling and video processing. This software tool is completely free and open source, and works particularly well for animated content. It is based on the WebSR project, which is an open-source WebSDK for applying real-time super resolution to videos on the web. It works by porting several open source AI Upscaling algorithms like Anime4K and RealESRGAN into WebGPU and WebGL2. The WebSR SDK then allows you to easily apply these AI Upscaling (Super resolution) algorithms to each frame of a video directly in the browser.
Your browser does not support , a required browser feature for this tool.
Try using the latest version of 
Chrome or 
Edge on a 💻 Laptop or 🖥️ Desktop.
For what it's worth, here's how it's supposed to work [YouTube link]
An error ocurred while processing the video:
Choose a video to upscale
Upscaling to x. Output: ~
| Settings | |
|---|---|
| Upscaling Network |
Upscaling .Estimated time left:
⏸ Processing Paused
Drag to scrub through frames — compare before & after
Adapted from the original source code by © Sam Bhattacharyya 2026 under the MIT license.