Upscale images in your browser with AI (Real-ESRGAN). No upload required, completely free. Supports PNG, JPEG, and WebP.
Drag & drop an image, or click to select
PNG / JPEG / WebP supported
Images up to 1920px on the longest side
Drag & drop or click to select the image you want to upscale. PNG, JPEG, and WebP formats are supported.
Choose 2x or 4x. The output is automatically adjusted so the longest side does not exceed 4K (3840px).
The AI (Real-ESRGAN) analyzes and enhances the image entirely in your browser. The AI model (~64 MB) is downloaded only on the first use.
Fine-tune brightness and color temperature in real time with sliders. No re-processing needed — changes are reflected instantly.
Download the upscaled image in maximum-quality JPEG.
No sign-up required. No usage limits. All features are free.
Images are never uploaded to a server. All processing happens in your browser.
State-of-the-art AI super-resolution technology sharpens blurry and low-res images.
Accepts PNG, JPEG, and WebP inputs. Outputs maximum-quality JPEG.
On WebGPU-capable browsers, AI processing leverages your GPU for 2-3x speed. WebAssembly fallback works on all modern browsers. Tile inference supports large images.
Toggle between original and upscaled images with one click. Brightness and color temperature changes are reflected instantly — no re-processing needed.
Yes, completely free. No sign-up, no login, no usage limits. Just open the page and start upscaling immediately.
No, your images are never uploaded. All AI processing happens locally in your browser, so even private or confidential images are safe to use with this tool.
Input: PNG, JPEG, and WebP. Output: maximum-quality JPEG (quality 100%). To preserve transparency, keep your input as PNG or use a separate tool.
Real-ESRGAN (Real-Enhanced Super-Resolution Generative Adversarial Network), an open-source AI super-resolution model that excels at upscaling photos, illustrations, and anime images while preserving fine details.
Input up to 1920px on the longest side. Output is auto-adjusted to fit within 4K (3840px). Choose 2x or 4x — the system automatically optimizes if the result would exceed the 4K limit.
Shaki is for images only. For video compression try our sister tool Chidimeru. For audio noise removal, try Shizuka.
Yes, modern smartphone browsers (Chrome, Safari, etc.) are supported. For images larger than 1024px on the longest side, we recommend using a PC due to memory constraints during AI processing.
Yes. Output images can be used freely (personal or commercial) by anyone who owns the rights to the input image. The original copyright remains with the original holder. We do not claim any rights to your images.