About ComparePicture
A single place to compare two pictures properly — and to understand what the difference actually is.
Why it exists
Comparing two pictures is something designers, QA engineers, photographers, shop owners and ordinary people all do, and each group has had its own tool: a before/after slider here, a pixel-diff script there, an EXIF viewer somewhere else. Each answers one question. ComparePicture puts those answers in one workspace that reads the pair once, aligns it, and lets you move between views without starting again.
What it will not claim
Pixels can show that two pictures differ and where. They cannot show who made a file, which came first, whether an edit was honest, or whether a picture is “real”. So the workspace never says “fake”, “original” or “manipulated”; it says “likely cropped” or “appears shifted”, and lists the measurements behind every reading.
How it is built
The site is static pages and code that runs in your browser: a comparison engine in a web worker, phase-correlation alignment, structural and perceptual measures, Tesseract for text and a compact MobileNetV2 model for visual similarity, both loaded only when you ask. There is no server-side image processing anywhere — see the privacy page for every request the site can make.
Getting in touch
If a comparison looks wrong — a change that was missed, a label that overstates, a picture that would not open — the contact form reaches the people who build it.