What does “invert image” mean?

Inverting an image flips each RGB channel value (for example, 0 becomes 255), producing a photo negative look. The alpha channel is left unchanged.

Is transparency preserved?

Yes for PNG and WebP: alpha stays as-is while RGB is inverted. JPEG has no transparency—transparent areas are filled with the background color you pick.

Why does the preview look different from my editor?

The preview is scaled to fit the panel; the downloaded file uses the image’s full native resolution.

Invert Image | AzWebTools

Learn More About Invert Image

How color inversion works

Each RGB channel is mapped with \(c{out} = 255 - c{in}\). That turns light areas dark and shifts hues to their complements on the color wheel. The alpha channel is usually unchanged, so transparent pixels stay transparent in PNG and WebP.

JPEG and transparency

Because JPEG cannot store an alpha channel, transparent regions are composited onto the background color you choose before export.

The Origin of the Photographic Negative

The concept of inverting an image to create a 'negative' dates back to the early days of photography. Pioneered by William Henry Fox Talbot in the 1830s, the calotype process was the first practical method for creating a translucent paper negative from which multiple positive prints could be made. This foundational negative-positive technique became the basis for chemical photography for over a century. Today's digital color inversion is the direct computational successor to this historic process.

The concept of inverting an image originates with the photographic negative, a process first developed by William Henry Fox Talbot in the 1830s to allow for the creation of multiple positive prints from a single negative.

Examples

Sample Scenario

Runtime-verified example for invert-image

Input

{"inputImage":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAAAXNSR0IArs4c6QAAAD9JREFUOE9jZKAQMFKon2Fj5in+M/w34aj/DfiBoPj/L/2/gYGB4T8UvICj/P8PHCBFREA0Gr8pINsBAMj8EHyJv4XPAAAAAElFTkSuQmCC","outputFormat":"PNG","imageQuality":92}

Output

{"dataUrl":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAACXBIWXMAAAPoAAAD6AG1e1JrAAAAHklEQVR4nGP4//8/AyWYYdQAhtEw+D8aBv+HRRgAAMWt/R8Fr+giAAAAAElFTkSuQmCC","filename":"inverted-image.png","mimeType":"image/png","width":16,"height":16}

Features

Local processing

Inversion runs in your browser with the Canvas API—your file does not leave your device.

Live preview

See the inverted result immediately in the preview while you pick format and quality.

Full-resolution export

Download matches the source pixel dimensions; alpha is kept for PNG and WebP.

Use Cases

Create a photo negative for creative or sci-fi style edits
Flip light/dark UI screenshots to check contrast or accessibility ideas
Invert logos or icons for dark-mode variants while keeping transparency
Produce quick negatives of diagrams or sketches for presentations

Frequently Asked Questions