Free AI Video Upscaler – Upscale Video to 4K Online
Free AI video upscaler online. Turn 1080p into true 4K or restore old low-res videos using in-browser WebGPU, FSR 1.0, and IMDN Neural Super-Resolution. No upload, no watermark.
Drop your video file here, or browse
Supports MP4, MOV, WEBM, MKV, M4V & TS. Processed 100% locally on your GPU — video never leaves your computer.
video.mp4
Upscaling Video Frames...
AI super-resolution and WebGPU rendering is hardware-intensive. Please keep this tab open.
Upscaling Complete!
Drag the slider across the preview below to inspect the detail enhancement.
⚡ How This AI Video Upscaler Works
Wexira AI Video Upscaler uses a high-performance, client-side dual-engine architecture that combines AMD FidelityFX Super Resolution 1.0 (FSR 1.0) and Deep Learning Convolutional Neural Networks (IMDN-RTE) to upscale videos up to 4K UHD directly in your web browser.
WebGPU Compute Shaders (FSR 1.0)
For HD videos (≥ 720p), the upscaler executes AMD FidelityFX Super Resolution compute shaders ported to WebGPU WGSL. It applies Edge-Adaptive Spatial Upsampling (EASU) followed by Robust Contrast-Adaptive Sharpening (RCAS) to deliver sharp, ringing-free 4K frames at real-time speeds.
Deep Learning Neural Network (IMDN-RTE)
For low-resolution and SD videos (< 720p), the engine leverages the Information Multi-distillation Network for Real-Time Enhancement (IMDN-RTE) ONNX model running on ONNX Runtime Web. It reconstructs missing high-frequency details and crisp edges.
Hardware-Accelerated WebCodecs & Vanilagy MediaBunny
Video demuxing, frame extraction, and final container encoding are accelerated via native browser WebCodecs (VideoDecoder and VideoEncoder) multiplexed with MediaBunny for fast 60 FPS rendering.
100% Private, Client-Side Execution
Your video files never leave your device. All neural network inference and shader computations run entirely on your local GPU/CPU with zero server uploads or data logging.
How to Use Free AI Video Upscaler – Upscale Video to 4K Online in 4 Easy Steps
Upload your video (MP4, MOV, MKV, WebM, or AVI) into the dropzone above.
Select your desired multiplier: 2x for fast enhancement or 4x for Ultra HD 4K upscaling.
Watch the live frame-by-frame progress and inspect the interactive Before/After comparison slider.
Click Download to save your enhanced, crystal-clear upscaled video.
Technical Specifications & Features
Frequently Asked Questions
Does this video upscaler upload my videos to any server?
No. Wexira processes 100% of your video locally on your machine using your browser's WebGPU and WebAssembly engines. Your files never touch external servers or third-party cloud storage.
What is the difference between 2x and 4x upscaling?
2x upscaling doubles the horizontal and vertical resolution (e.g. 1080p to 4K), providing crisp sharpness with fast render speeds. 4x upscaling applies deeper super-resolution distillation for low-resolution footage (e.g. 480p to 4K).
Which browsers support WebGPU AI video upscaling?
Modern versions of Google Chrome, Microsoft Edge, Brave, and Chromium-based browsers on Windows, macOS, and Linux offer full WebGPU hardware acceleration. On other browsers, multi-threaded WASM SIMD runs automatically as a fallback.
Is there any file size limit or watermark?
No. Because your own device performs the processing, there are no artificial file size caps, subscriptions, or watermarks added to your output.