Image Upscaler

Scale an image up 2×–4× with browser bicubic and optional unsharp mask.

Tool Media & Files Updated Apr 19, 2026
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How to Use
  1. Drop image.
  2. Pick factor and sharpening level.
  3. Download larger image.
Image
⤢
Drop image
—
Preview

Notes

Method
High-quality bicubic
Unsharp mask
Recovers edges
2×
Safest bet
4×
Visibly soft
Compute
Grows O(n²)
Privacy
Local

Frequently Asked Questions

AI upscaling?

This is bicubic + optional unsharp. For neural super-resolution you need a dedicated model.

Common Use Cases

Print prep

Gentle upscale from web-size source.

Retina

Quick 2× for HiDPI.

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