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Image Upscaler

Enlarge an image with sharpened resampling, honestly.

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Drop an image here, or click to choose one

JPEG, PNG, WebP, GIF or SVG · processed on your device, never uploaded

Quick Tool Overview

The Image Upscaler enlarges in several small steps rather than one jump, which keeps far more edge definition, then restores crispness with a thresholded unsharp mask. It is a clear improvement on a plain browser resize, and it is explicit that no upscaler can recover detail that was never captured.

What it does
Enlarges an image with better-than-default quality
You give it
A small image and a scale factor
You get back
A larger image with cleaner edges
Best for
Small photos, logos and low-resolution assets
Image Tools Free, unlimited use No sign-up Runs in your browser

About the Image Upscaler

Enlarging an image cannot add detail that was never captured. Anything claiming otherwise is inventing plausible-looking pixels, which is sometimes what you want and often produces a face with the wrong texture.

What this does is the honest version, and it is better than a plain resize by a clear margin. The enlargement is done in several small steps rather than one jump, which preserves far more edge definition; an unsharp mask then restores the crispness resampling costs, with a threshold so noise is not amplified along with it. For flat graphics and pixel art a nearest-neighbour mode keeps hard edges perfectly hard. Expect a real improvement over a browser resize, and not a photograph that was never taken.

Key features of the Image Upscaler

Stepped resampling

Several small enlargements instead of one large jump, which preserves noticeably more edge definition.

Thresholded sharpening

Restores the crispness resampling costs without amplifying noise in flat areas.

Nearest-neighbour mode

For pixel art and flat graphics, where smooth interpolation destroys exactly what makes them work.

Side-by-side comparison

The result against a plain resize, so the difference is visible rather than claimed.

Honest framing

The page says outright that detail cannot be recovered, and where the realistic limit is.

How to use the Image Upscaler

  1. 1

    Load the image

    Small photographs and low-resolution graphics are the usual cases.

  2. 2

    Choose the scale

    2× is where results stay convincing; 4× and beyond show the limits.

  3. 3

    Pick the method

    Stepped resampling for photographs, nearest neighbour for pixel art and flat graphics.

  4. 4

    Tune the sharpening

    Enough to restore the edges without producing halos.

Frequently asked questions

No, and nothing can. Upscaling spreads existing detail over more pixels. What good upscaling does is keep edges clean while doing that, rather than turning them to mush.

Reviews of the Image Upscaler

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