Wimager

Free image upscaler in your browser — Lanczos-3 resize, edge-aware sharpening, and contrast boost. No uploads.

or drop image here

Free online image upscaler

Wimager is a free online image upscaler that helps you increase image resolution using Lanczos-3 upscaling, edge-aware sharpening, and contrast enhancement. Everything runs in your browser — no uploads.

Popular searches: image upscaler online free, Lanczos upscaler, increase resolution online, upscale photo online.

Preview

Original

No image yet

Result (live preview)

Move the slider to preview

Upscale options

Size multiplier

2.0×

Live preview is capped for speed. Export creates full resolution.

Mode

Width

Height

Lock aspect ratio

Resize algorithm

Lanczos gives more detail but is slower (pure JS).

Sharpen

Enable sharpening

Type

0.35

Edge-aware reduces halos by limiting sharpening on strong edges and flat regions.

Contrast

Enable contrast boost

1.15×

Contrast formula: (pixel − 128) × amount + 128

Format

Quality

0.90

File: —

Original: —

Target: —

Download

Tip: For text/docs, try Lanczos + Edge-aware + moderate contrast.