Image Tools
Image Upscaler Online
Increase image resolution with high-quality Lanczos upscaling and optional sharpening. Not an AI model.
- Private when possible
- No account required
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About this tool
Increase image resolution with high-quality upscaling. Image Upscaler enlarges photos using Lanczos-3 interpolation, stepwise passes for large jumps, and optional sharpening. It is not an AI super-resolution model.
How to use
- Upload a JPG, PNG, or WebP image.
- Choose 2×, 4×, or a custom scale (up to 4×).
- Optionally adjust sharpening.
- Download the larger image and compare before/after.
Features
- 2×, 4×, and custom scale
- Lanczos-3 interpolation
- Optional sharpening strength
- Before/after preview of the real output
- Verified output dimensions
- Safe pixel / edge limits
Common use cases
- Enlarge small exports
- Prepare larger previews
- Scale for print layouts
Supported formats
JPG · PNG · WebP
Privacy
This tool processes data in your browser. Content is not uploaded to our servers unless a feature explicitly requires a network request.
Limitations
- Uses high-quality interpolation, not AI/ML super-resolution.
- Very large outputs may be blocked to protect browser memory.
Frequently asked questions
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