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Image Inverter

Invert colours to make a photographic negative.

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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 Inverter flips every channel to produce a photographic negative, and offers a luminance-only mode that swaps light for dark while leaving the hues intact. That second mode is the one that turns a white-background diagram into a dark-mode version without turning every red arrow cyan.

What it does
Inverts image colours or brightness
You give it
A photo, scan or diagram
You get back
The inverted version
Best for
Scanned negatives and dark-mode diagrams
Image Tools Free, unlimited use No sign-up Runs in your browser

About the Image Inverter

Inverting replaces every channel value with its opposite, turning a photograph into the negative it would have been on film. It is instant, exactly reversible, and more useful than it first sounds.

The two real uses are scanning and diagrams. A photographed film negative becomes a viewable positive with one click. A diagram or screenshot with a white background becomes a dark-mode version — and for that case the luminance-only mode is what you want, since it flips light and dark while leaving the hues alone, so red arrows stay red instead of turning cyan.

Key features of the Image Inverter

Exactly reversible

Each value becomes 255 minus itself, so inverting twice returns the original bit for bit when saved as PNG.

Luminance-only mode

Flips light and dark but keeps the hues, which is what a colour-coded diagram needs for dark mode.

Film mask compensation

A tint control offsets the orange mask on scanned colour negatives, which a plain inversion leaves behind.

Instant

A per-pixel operation with no search or iteration, so it is immediate on any size of image.

Keeps transparency

The alpha channel is left alone, so cut-out images stay cut out.

How to use the Image Inverter

  1. 1

    Load the image

    A photo, a scanned negative or a diagram.

  2. 2

    Pick the mode

    Full inversion for a true negative; luminance only to flip light and dark but keep the hues.

  3. 3

    Adjust if scanning film

    Scanned negatives usually need the orange mask removed as well, which the tint control handles.

  4. 4

    Download

    Inverting again returns the original exactly.

Frequently asked questions

Yes. Each channel value becomes 255 minus itself, which is exactly reversible. Inverting twice gives back the original, provided you save as PNG rather than re-compressing as JPEG.

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