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✦ Free & open sourcePhotographers

QualityScaler

Windows desktop AI application for upscaling, enhancing, and denoising photos and videos completely offline.

AI image and video upscaling for Windows PCs

Enhance photo details, upscale videos, and reduce noise offline using your local DirectX 12 GPU.

Free forever · open source · MIT
✓ Light setup✓ Browser-based✓ Real-time collaboration
7.8
ZEKAI
Powerful local upscaler
Free & open source · Photographers
Ease of setup7
Usefulness8
Maintenance8.5
Community7.5
★ 3,224
GITHUB
Aug 2026
UPDATED
MIT
LICENSE
🛠 Don't want to self-host? We can set it up →
⚡ Quick answer

QualityScaler is a local Windows desktop application designed to upscale, de-noise, and enhance images and videos using deep learning models. It runs entirely on your hardware without transmitting data to external servers, making it ideal for privacy-conscious photographers and video editors.

Runs on
Cross-platform
Hosting
Desktop
Languages
Python
License
MIT

What it is

The app processes raster images and various video formats through AI architectures like BSRGAN and Real-ESRGAN to boost resolution and clear up compression artifacts. It includes automatic image tiling to prevent GPU memory exhaustion and lets you blend upscaled output with original files using adjustable interpolation levels.

Who it's for

It suits photographers, archivists, and videographers who need local batch upscaling without cloud subscription fees or internet access. It is not suitable for users on macOS or Linux, or those without a dedicated DirectX 12 graphics card.

Key features

Automatic Image Tiling

Splits large photos into smaller tiles during processing to avoid running out of GPU memory.

Local Offline Processing

Runs entirely on your local graphics hardware without requiring an internet connection or uploading files.

Interpolation Blending

Blends original images and upscaled outputs at low, medium, or high levels to maintain natural detail.

EXIF Metadata Preservation

Transfers metadata from original photo files directly to upscaled outputs using exiftool.

How to start

Up and running in 3 steps

1
Download the pre-compiled executable release or clone the repository to your PC.
2
Place the required ONNX AI model files into the AI-onnx directory if running from source.
3
Launch the application, choose your target GPU, and drag images into the GUI to start upscaling.
Real talk

Our honest verdict

What's great

  • Works with AMD, Intel, and Nvidia graphics cards supporting DirectX 12.
  • Supports a wide array of image formats including HEIC, WEBP, TIF, and PNG.
  • Includes video upscaling features with stop and resume capabilities.
  • Preserves original EXIF metadata when processing photo batches.

Where it falls short

  • Requires a Windows PC with at least 4GB GPU VRAM for stable operation.
  • Not supported natively on macOS or Linux operating systems.
  • Running from source requires manual downloads of model weights and FFmpeg binaries.
Cost

Pricing & license

QualityScaler is free open-source software under the MIT license. There are no paid cloud tiers, so your only cost is the hardware and electricity needed to run processing locally.

Paid work

Open remote AI-training roles

767 open remote AI-training roles, updated November 14, 2026; most pay $20–$175 an hour. Zekai lists them free; the application goes to the employer’s platform.

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📄 Free PDF: QualityScaler for Photographers
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Questions

FAQ

Does QualityScaler require an active internet connection?

No, all image and video processing happens locally on your computer's graphics processor.

Can you run QualityScaler on an AMD graphics card?

Yes, it uses ONNX Runtime DirectML to support DirectX 12 compatible GPUs from AMD, Intel, and Nvidia.

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