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Self-hosted · Image

Upscayl

Local open-source image upscaling — privacy-friendly enhancement.

Best for: Local upscaling of photos/diagrams

Pricing: Free (OSS)

Official site All tools

Strengths

Runs offline
Simple UI
Good for enlarging diagrams/photos

Watch-outs

Won’t invent true detail
GPU helps

Appears in these stacks

Image generation & mockups · supporting — Local upscale of stills/diagrams.
Marketing graphics & thumbnails · supporting — Local upscale before publish.
Product photography for shops · supporting — Local upscale before upload.