Invert image colors online.
Create a negative-style image by reversing the colors of your photo or graphic. Preview the result and download the inverted image instantly.
Drag & drop your image here · Choose Image
A fast, client-side color inversion engine designed to reverse RGB color channels, create film negative effects, and improve inverted document readability directly in your web browser.
Color inversion is the process of mapping every pixel color to its exact complementary opposite on the color spectrum. Bright pixels become dark, dark pixels become luminous, and all intermediate RGB hues are mathematically inverted.
Whether you are converting scanned black-on-white text into high-contrast dark mode, creating surreal digital pop-art, or developing classic 35mm film negatives into digital positives, ReducerImage delivers pixel-accurate results with strict alpha transparency preservation.
Mathematical breakdown of channel transformation and complementary color output.
| Inversion Mode | Channel Calculation | Complementary Mapping | Primary Use Case |
|---|---|---|---|
| 🔄 Full RGB Invert | `R'=255-R, G'=255-G, B'=255-B` | Red ↔ Cyan, Green ↔ Magenta, Blue ↔ Yellow | Photo Negatives & Full Color Reversal |
| 🎞️ Grayscale Invert | `Y'=255 - (0.2126R + 0.7152G + 0.0722B)` | Black (#000) ↔ White (#FFF) | Scanned Invoices, Dark Mode Documents, X-Rays |
| 🔴 Red Channel Only | `R'=255-R, G'=G, B'=B` | Cyan Tint Overlay | Experimental Photography & Glitch Art |
| 🟢 Green Channel Only | `R'=R, G'=255-G, B'=B` | Magenta Hue Shift | Infrared & False-Color Landscape Emulation |
| 🔵 Blue Channel Only | `R'=R, G'=G, B'=255-B` | Amber / Golden Hour Hue Shift | Vintage Retro Color Grading |
Unlike basic tools that turn transparent PNG or WebP backgrounds into solid black or white, our algorithm explicitly ignores the Alpha channel ($A' = A$). Every transparent pixel retains its 100% opacity or translucency, making this tool perfect for inverting logos, icons, stickers, and vector cutouts without unwanted background bounding boxes.
Our color inversion pipeline executes in four synchronized steps:
Decodes full image dimensions into an in-memory 32-bit Uint8ClampedArray pixel buffer.
Subtracts raw byte values from 255 across all active channels while locking the alpha byte.
Interpolates inversion percentage slider ($0–100\%$) and applies boundary region masks.
Generates genuine, high-resolution JPEG, PNG, or WebP files with verified byte count.
Follow these simple steps to invert photo colors and download negative images in seconds.
Drag & drop or select your JPG, JPEG, PNG, or WebP photo.
Choose Full RGB Invert, Grayscale Invert, or Channel-Specific options.
Toggle Red, Green, or Blue checkboxes to invert specific color layers.
Use the strength slider ($0–100\%$) for subtle or full negative transformation.
Optionally invert only inside or outside a circular or rectangular boundary.
Drag the split slider handle to inspect original pixels vs inverted output.
Select JPG, PNG (with transparency), or WebP with custom encoding quality.
Save your high-resolution negative photo instantly.
Answers to common questions about color inversion, photo negatives, and transparency preservation.