Upscayl

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What it does

Free, open-source AI image upscaler that runs locally, no watermarks, no limits, up to 16x.

Detailed overview

Quality upscaling usually means paid cloud tools and uploading your images; Upscayl is free, offline, and private. It's completely free with no watermarks or usage limits, runs locally via Vulkan GPU acceleration, and can enlarge up to 16x using multiple specialized models. It's a community-built tool with no marketing engine, yet rivals paid upscalers for many uses. Real-ESRGAN-based with 44,000+ GitHub stars, AGPL-3.0, featured in Digital Trends, How-To Geek, and on Y Combinator; repository updated May 2026 with ongoing commit activity; optional Upscayl Cloud for those without a strong GPU.

Key features

• Runs locally, fully offline and private
• No watermarks or usage limits
• Vulkan GPU acceleration, up to 16x
• Multiple Real-ESRGAN-based models

Who it's for

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