ClearPixUpscale video to HD / 4K — free & private
ClearPix upscales videos to 720p, 1080p, 2K or 4K with Real-ESRGAN super-resolution applied frame by frame, entirely in your browser. Clips up to 60 seconds are fastest; longer clips are accepted but run slower and export at a lower frame rate. The ffmpeg fallback is capped at 15 seconds. Free, no sign-up, audio preserved, no watermark, and the file never leaves your device.
Real-ESRGAN super-resolution applied frame by frame, entirely in your browser. Best for clips up to 60s — longer clips work too, just slower. No upload, no queue, no watermark on your export.
Drop a short video here, or click to browse
MP4 / WebM / MOV / MKV — any length (fastest up to 60s), processed locally frame by frame
What local processing means
NDA footage and home movies are decoded, enlarged and re-encoded on your own device rather than uploaded to a cloud enhancer. The video pipeline, Real-ESRGAN model, runtime and public demo media still need to download initially. Once the required resources are cached, supported clips can be processed offline. Network activity for anonymous product events does not include your video, frames or filename.
How in-browser video upscaling works
- Your clip is demuxed into frames locally with WebAssembly FFmpeg — it never leaves your device.
- Each frame runs through the Real-ESRGAN super-resolution model (ONNX, WebGPU when available).
- Upscaled frames are re-encoded to H.264 MP4 with your original audio track.
Tips for best results
- Shorter is faster: about 60s or less keeps the full frame rate — longer clips still work, but are sampled to a fixed frame budget, so the exported fps drops.
- Pick the target that matches where the clip will be viewed — 2K is recommended for most footage, while 720p is the faster compatibility option.
- For old or noisy sources, remove compression artifacts first for a cleaner upscale.
Video upscaling FAQ
Can I upscale a video to 4K for free?
Yes — pick the 3840 px target and the Real-ESRGAN model enhances every frame. Keep the clip short: at 4K, a 10-second clip means roughly 300 frames of AI inference, so expect several minutes on a laptop GPU. The tool is free with no sign-up, and exports carry no watermark.
What is the maximum video length for upscaling?
There is no hard length cap on the WebCodecs path (Chrome, Edge, Safari) — the 60-second figure is a recommendation, not a limit. Very long clips are accepted too, but they are processed against a fixed 360-frame budget, so they run slower and export at a lower frame rate; clips slow enough to clear an 8-minute estimate first ask you to confirm. Browsers without WebCodecs use the ffmpeg fallback, which is capped at 15 seconds. For best results, trim the part you need.
Does the upscaled video keep its audio?
The original audio track is copied into the re-encoded H.264 MP4 when the browser path supports it; if audio setup fails, the result may be video-only. Duration is preserved and the picture is rebuilt frame by frame, but long clips may export at a lower frame rate to stay within the frame budget.
Is my video uploaded to a server?
No. Frames are decoded, enhanced and re-encoded locally in your browser — the only downloads are the AI model (2.4–4.9 MB) and the video engine (about 32 MB), both cached after first use. You can verify in the network panel that the video itself is never sent anywhere.
What is Turbo mode?
Turbo mode halves the resolution the AI model works on, cutting per-frame computation roughly 4× so weak or older devices can finish clips they otherwise could not. The export keeps your chosen target resolution — the model reconstructs from a smaller input, so the detail ceiling is slightly lower than the standard path. It switches on automatically on devices without WebGPU or with few CPU cores, and you can toggle it next to the quality tiers.