Upscale AI-Generated Video to 4K Free

Take your AI videos from Sora, Runway, Pika, or Stable Video Diffusion to the next level. Upscale low-res generations to crisp 1080p or 4K in your browser. Nothing is uploaded, nothing is stored. Sharpen AI artifacts instantly. No sign-up, no watermark.

100% secure and private
Perfect for social media
GPU acceleration

Free video upscaler. Gets the best possible detail and smooth edges from your video. Runs on your device, no upload, no watermark.

⚠️

Heavy on CPU and GPU. Close other tabs and apps, keep this tab open and visible, and plug in your device. If it is slow, pick 720p or 1080p and Original fps.

⚠️ Performance Warning

If you don't have a graphics card (GPU), rendering will be slow. A GPU finishes short clips in seconds, a CPU can take several minutes.
Please upload large files (close to 400 MB) one by one or in very small batches.
Do not upscale 4K resolution for all files at once. Please try batches of 2 to 5 files for 4K.
Processing speed depends heavily on your GPU, CPU, and system memory.
Mobile devices will be significantly slower than laptops and desktop PCs.

100% Secure
No Upload
No Watermark
Runs in Browser

What is AI Video Upscaling?

AI video generators like Sora, Runway, and Pika often output video at low resolutions (like 512x512 or 720p) to save on compute costs and generation time. When you view these on a modern 1080p or 4K screen, they look soft, blurry, or blocky. AI video upscaling is the process of using a neural network to intelligently enlarge the video frame by frame. It uses hardware acceleration (WebGPU) to sharpen edges, reduce compression artifacts, and rebuild the image so it looks crisp and professional.

Price: Free
Account required: No
Video uploaded to a server: No, processed locally
Watermark: None added
Supported AI Sources: Sora, Runway, Pika, Stable Video Diffusion, Haiper
Max Resolution: Up to 4K (2160p)
Input formats: MP4, WebM, MOV
Speed: Seconds on a GPU with WebGPU

Why do AI videos need upscaling?

Low Native Resolution

Most AI video diffusion models are incredibly taxing on GPUs. To keep generation times reasonable, platforms often cap output resolution at 512p or 720p. When you download that file, it lacks the pixel density needed for modern displays. Upscaling fills in those missing pixels with AI interpolation.

Platform Compression

If you generate a video on a web platform and download it, the file might already be compressed with H.264 artifacts. AI video upscaling acts as a sharpening filter, cleaning up the mushy, blocky edges caused by video compression and making the generation look clearer.

Professional Workflows

Filmmakers and creators use AI video for B-roll, music videos, and visual effects. To mix a low-res AI clip with a 4K camera shot, you have to upscale it. Upscaling to 4K gives you room to crop, pan, and color-grade without the footage falling apart.

Better Social Media Performance

Twitter/X, Instagram Reels, and TikTok heavily compress video. If you upload a low-res AI video, the platform compression will ruin it. By upscaling to 1080p first, your video survives the platform compression and looks much sharper in the feed.

What it can and cannot do

An honest look at what to expect when upscaling AI-generated video.

What works well

Increase the resolution of low-res AI outputs (512p or 720p) to crisp 1080p or 4K
Sharpen the soft, painterly edges that AI models often produce
Reduce the blocky compression artifacts seen when downloading from web platforms
Keep the original audio track (if your AI video has sound)
Give you a clean file ready for professional video editing software

What to keep in mind

Fix physics glitches, morphing objects, or temporal flickering from the AI generation
Recover details that the AI model simply hallucinated or never rendered
Run fast without WebGPU (phones and older laptops will use a slower CPU fallback)
Process live streams or video formats that your browser cannot decode natively
Remove existing watermarks from platforms that force them

How to upscale AI-generated video

1
1. Export your AI video
Download the raw video from Sora, Runway Gen-2/Gen-3, Pika, or Stable Video Diffusion. Drop the MP4 or WebM file into the tool above.
2
2. Choose 2x or 4K upscale
AI videos often output at 512p or 720p. Choose a 2x multiplier or a 4K target resolution. The WebGPU engine analyzes the frame locally.
3
3. Download the crisp result
The AI sharpens the edges and removes compression mush. Download your clean, watermark-free MP4 ready for YouTube, X (Twitter), or film projects.

Frequently Asked Questions

Can I upscale videos generated by Sora or Runway?

Yes. Any AI video generator that lets you download an MP4 or WebM file (including OpenAI Sora, Runway Gen-2/Gen-3, Pika Labs, Stable Video Diffusion, and Haiper) can be processed by this tool. Just download the raw output and drag it into the box above.

Will upscaling fix the weird morphing artifacts in AI videos?

No. Upscaling improves resolution and sharpness, but it cannot fix temporal consistency or physics errors (like a hand melting into a face). It will make the video look crisper and hide compression blockiness, but the underlying AI generation errors will remain.

Why do AI-generated videos look blurry or compressed?

Most AI video models (like older versions of Runway or Stable Diffusion) output at low resolutions like 512x512 or 720p to save on generation time and server costs. When you watch a 512p video full-screen on a 1080p or 4K monitor, the browser has to stretch the pixels, which causes blur and blocky compression artifacts.

Does upscaling remove the AI watermark?

This tool does not magically remove watermarks. However, if you are using a version of an AI tool that does not add a watermark, our tool will not add one either. We export clean, uncompressed MP4 or WebM files.

Can I upscale Midjourney images to video?

If you used a tool to animate a Midjourney image (like Runway or Pika) and downloaded the video, you can absolutely upscale that video here. If you just want to upscale the static Midjourney image, use our Image Upscaler tool instead.

What is the best resolution for AI video?

For social media (Instagram Reels, TikTok, X), 1080p is perfect. If you are using AI video for a commercial project, a music video, or a short film, we highly recommend upscaling to 4K. It gives you extra room to crop or pan in your video editor without losing quality.

Is it safe to upload my unreleased AI video?

We don't upload it at all. The entire upscaling process uses your device's local GPU via WebGPU and WebCodecs. Your unreleased AI generation is never sent to a server, making this tool 100% safe for confidential projects.

Why does it say WebGPU not available on my phone?

WebGPU is a modern browser feature required for fast, hardware-accelerated AI upscaling. Many mobile browsers (especially iOS Safari) do not fully support it yet. If it is unavailable, the tool falls back to your CPU, which is slower. For long AI videos, use a desktop PC or Mac.

Can I upscale a video from Twitter/X or TikTok?

Yes, but the quality will depend on the source. If you download a heavily compressed video from Twitter/X, upscaling might sharpen the compression blocks rather than revealing real detail. Always upscale from the original, highest-quality export from your AI generator.

How large of a file can I upscale?

We recommend keeping files under 300 MB and 3 minutes per run. AI videos are usually very short (3 to 10 seconds), so you will rarely hit this limit. If you have a longer AI compilation, trim it first with our Video Trimmer.