FlashVSR
An online video super-resolution service powered by diffusion models — upload an MP4 to rebuild detail, remove compression artifacts, and upscale to 4K.
About FlashVSR
FlashVSR is a diffusion-model-based AI video super-resolution online service. Users upload an MP4 video, and the tool rebuilds textures, removes compression artifacts, enhances detail, and upscales the video to 720p, 1080p, 2K, or 4K. Unlike frame-by-frame upscaling methods, it maintains temporal consistency across frames through Locality-Constrained Sparse Attention, reducing flicker and smearing during motion. The service is powered by the FlashVSR research from OpenImagingLab, and new users receive 8 free credits upon registration.
Best for
Best use cases
Upscaling AI-generated videos or low-resolution footage to 1080p, 2K, or 4K for publishing
Restoring MP4 videos with compression artifacts, rebuilding textures and fine detail
Improving throughput when batch-processing multiple videos using concurrent task allowances
Features
Diffusion-Model Detail Reconstruction
Intelligently rebuilds textures with a diffusion model, removes compression artifacts, and enhances subtle details that simple upscaling algorithms miss.
Temporal Consistency Engine
Locality-Constrained Sparse Attention keeps motion smooth across frames, avoiding the flicker and smearing common in frame-by-frame processing.
Multi-Resolution Output Control
Choose 720p, 1080p, 2K, or 4K as your target resolution; the hosted service currently accepts MP4 input and returns the enhanced MP4.
API Access for Max Subscribers
Max subscribers can email [email protected] to request API access, with the team verifying the subscription before activation.
Pros
- Supports upscaling to multiple target resolutions: 720p, 1080p, 2K, and 4K
- Maintains inter-frame consistency through Locality-Constrained Sparse Attention, reducing flicker and smearing
- Rebuilds textures and detail with a diffusion model to remove compression artifacts
Cons
- The hosted service currently only accepts MP4 input, and outputs MP4 as well
Pricing Plans
Starter
- 800 credits/month
- Up to 160 seconds of 720p upscale
- Up to 61 seconds of 4K upscale
- Up to 100 Nano Banana 2 Lite images
- Up to 8 Seedance 2 Mini 480p short videos
- 2 concurrent tasks
- Private generation by default
- Watermark-free image outputs
Pro
- 2,400 credits/month
- More monthly credits and concurrency
- Private generation by default
- Watermark-free image outputs
* Pricing information is for reference only. Please refer to the latest announcement on FlashVSR's official website.