Upscale videos or images with AI for free, right in your browser – no signups, installation or config necessary. It is fast, free and open source.
Upscale up to 10 videos, one after another, right in your browser.
Only 10 videos fit in a batch — the rest were left out.
Drag the divider across our Neo-Cinema test frame to compare compressed 720p source pixels against 4K neural super-resolution.
Runs genuine neural super-resolution shaders (Anime4K CNN, Katana UNet, and Real-ESRGAN x4v3) directly on your GPU inside Chrome, Edge, Firefox, or Safari. Zero bytes of your video ever leave your device?enabling unlimited 4K exports with zero watermarks.
Working on a lightweight laptop or phone, or restoring heavily compressed footage? Switch to Fast Cloud RTX for 23-block Real-ESRGAN restoration & 25-video batches from $0.01.
Exports fast-start H.264 MP4 up to 3840×2160 (landscape) or 2160×3840 (9:16 vertical) with original stereo audio preserved—ready for YouTube 4K VP9, TikTok, Reels, Premiere Pro, and DaVinci Resolve.
Unlike basic HTML5 canvas resizers, UpscaleX compiles multi-layer convolutional and UNet weights into native WGSL WebGPU compute shaders:
Yes. Because the in-browser engine uses your own computer's GPU via WebGPU and WebGL2, we have zero server GPU costs for local upscaling—allowing unlimited free 4K exports with no watermark and no sign-up.
Never in free browser mode. Every stage—WASM demuxing, neural network tile inference, and WebCodecs H.264 encoding—executes inside your browser sandbox with 100% client-side privacy.
UpscaleX runs genuine multi-layer neural network weights (up to 28-layer CNNs, Katana UNet, and Real-ESRGAN x4v3) on every single video frame at 2×–4× resolution, utilizing your discrete GPU hardware just like native desktop software.
You can enable hardware acceleration via our WebGPU setup guide, or use Fast Cloud RTX 4090 mode to upscale on dedicated cloud GPUs in seconds.