Invert Image Colors
Processing entirely on your device — large files may take a moment.
Every channel is mapped to its opposite (255 minus the value), which is exactly how a film negative develops — ideal for inverting blackboard scans, film negatives and white-on-black diagrams.
Inversion is lossless in intent — run it twice and you are back to the original pixels (modulo one JPG re-encode per pass).
How to invert image
- 1
Select your files
Drag & drop your JPG files onto the area above, or click to browse. You can add multiple files at once for batch conversion.
- 2
Convert instantly
Click "Convert to JPG". The conversion runs entirely inside your browser using WebAssembly — no upload, no queue, no waiting.
- 3
Download results
Download each converted JPG file individually, or grab everything at once as a ZIP archive.
About the JPG format
JPG (short for JPEG, the Joint Photographic Experts Group committee that standardized it in 1992) has been the default photo format for over three decades. It compresses photographs using the discrete cosine transform: the image is split into 8×8 blocks, and details the human eye is bad at noticing are discarded. The result is files many times smaller than uncompressed data, at a quality level you control when saving.
In practice JPG is unbeatable for photographs and smooth gradients — camera memory cards, messaging apps and the web all assume it. It is a poor fit for screenshots, logos or anything with sharp edges and flat color, where compression leaves visible ringing around text. There is no transparency support, color depth is capped at 8 bits per channel, and every re-save with compression compounds tiny generational losses.
+Strengths
- ✓Opens on literally every device, app and browser made in the last 30 years
- ✓Compresses photos dramatically — typically 10:1 or better with little visible loss
- ✓Quality level is adjustable, so you can trade fidelity for file size
- ✓Mature ecosystem: EXIF metadata, ICC profiles and progressive loading all supported
!Limitations
- −Lossy — artifacts appear on text, sharp edges and flat areas
- −No transparency, so overlays and logos need PNG or WebP instead
- −Repeated re-saving at low quality permanently degrades the image
Frequently asked questions
Will inverting twice restore the original?
Yes, pixel-exactly for PNG/WebP. JPG adds one generation of lossy encoding per pass.
Does transparency survive?
Yes. The alpha channel is untouched — only RGB channels invert.
Why do my inverted photos look odd?
They do not — blue skies become orange-brown, which is the correct negative. Perceptual oddities come from unusual source colors.