Free AI Video Upscaler
Upscale a video to 1080p, 2K or 4K in your browser — clearer, sharper, no watermark.
- No signup
- No watermark
- Nothing uploaded
- No length limit
Drop a video here or choose a file
MP4, MOV, MKV, WebM, AVI, MPG, VOB, WMV, FLV, DV, MTS, M2TS or TS · up to 2 GB
How this free video upscaler works
- Choose a clip. The browser reads its resolution, frame rate and size on your device; nothing is uploaded.
- Pick 1080p, 2K or 4K and a quality tier. The upscaler runs on your graphics card through WebGPU and shows a time estimate before it starts.
- Compare before and after on the same frame, then download the result as MP4, MOV, MKV or WebM. The sound is kept or re-encoded to fit the format; if a format can't carry it, the panel says so before you start.
Clips of any length: the estimate before Start gives the time, and progress is saved as it goes. Upscaling goes up to 4×, so 720p and 1080p videos can reach 4K and 480p can reach 2K.
Needs a browser with WebGPU: current Chrome, Edge or Safari, or Firefox on Windows and Mac — on a phone, Chrome, Edge or Samsung Internet on Android 12 or newer, or Safari on iOS 26.
How to upscale video to 4K free in your browser — the full guide
Questions people ask
- Is 4K upscaling actually 4K — and is it worth it?
- The file is a real 3840 × 2160 video; how much detail it shows depends on the source — a clean 1080p clip gains crisper edges, a heavily compressed 360p one stays soft. It pays off on a 4K screen or for a platform that gives 4K uploads a better encode, such as YouTube; for a clip watched only on a phone, 1080p looks the same and finishes sooner.
- Is this 4K quality enhancer free, and which files can it open?
- Yes. It runs in your browser on your own graphics card: no upload, no account, no queue, no watermark. It opens MP4, M4V, MOV, MKV, WebM and 3GP, and inside the page it rewraps AVCHD camcorder files (MTS, M2TS) and TS recordings as MP4 and converts older AVI (DivX, Xvid), MPG, VOB, WMV, FLV and DV files to MP4. The limits are 2 GB per file and 4× enlargement.
- Does it work on a phone?
- Yes, in a browser with WebGPU: Chrome, Edge or Samsung Internet on Android 12 or newer, or Safari on an iPhone with iOS 26. A phone offers the same sizes up to 4K; the job runs several times slower than on a computer, and the time estimate follows the phone as it warms up. Opened inside an app such as Google, Facebook or TikTok, the page says how to save the video there, or asks you first to open the link in your browser.
- Is my video uploaded anywhere?
- No. The clip is decoded, upscaled and re-encoded on your own device, and the result is written to your browser's private storage for you to download. The page only fetches its own files and the model files — your video never leaves the browser.
- Will it fix a blurry video?
- It makes the video bigger with firmer edges and, with the Pro or Ultra quality, without compression blocks. It does not fix blur, camera shake or motion blur, and it never invents detail the frame never had — press "Preview this frame" before a run to see what it does for your clip.
- Is there a length or time limit, and can I upscale several videos at once?
- No — a long video, a full movie or an hour-long recording runs the same way a ten-second clip does, and the only ceiling is 2 GB per file. The finished part is written into your browser as the run goes, so you can close the tab and continue the job from there. On a computer, yes: choose several videos or a whole folder — up to 200 in one batch, one set of settings — and they are upscaled one after another.