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ToolKH
Developer Utilities

AI-Style Image Upscaler

Upscale images 2×, 3×, or 4× using multi-step high-quality resampling with optional sharpening — all directly in your browser, no uploads needed.

Upload Source Image

Drag and drop your image here, or click to browsePNG, JPEG, WEBP, BMP, GIF supported · Max 20 MB
2× Upscale3× Upscale4× UpscaleSharpening FilterMulti-Step Process
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Upload

Drop any PNG, JPEG, or WEBP image up to 20 MB.

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Configure

Pick scale factor (2×–4×), sharpening mode, and output format.

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Download

Save your high-resolution upscaled image instantly.

100% Client-Side Privacy

Your images never leave your device. All upscaling happens directly in your browser using the HTML Canvas API.

Multi-Step Upscaling

Instead of a single stretch, we upscale in incremental steps to minimize aliasing and preserve more detail.

Sharpening Filter

Apply an unsharp mask post-upscale to restore edge clarity, perfect for low-res logos, text, and line art.

Format & Quality Control

Export as PNG (lossless), JPEG, or WEBP with adjustable quality from 60–100% to balance file size and sharpness.

Note on Quality:This tool uses high-quality canvas resampling with optional sharpening — the same technique used by professional image editors like Photoshop's "Bicubic Smoother". Results are excellent for illustrations, UI assets, and moderate photo enlargements. For extreme AI super-resolution (e.g., 8× low-quality photos), a dedicated AI model would be needed.

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