A professional, lightweight and fast image comparison & compilation tool for Windows.

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🇬🇧 English version

Comparateur Pro streamlines comparing multiple images at once, with perfect zoom and pan synchronization, intelligent auto-alignment and heatmap analysis. Since version 2.0 it also includes an image compilation builder: assemble grids and boards (gallery covers, before/after sheets…) without any external editing software.

It is the ideal tool for photographers, designers and anyone who needs precise visual comparisons or polished image boards.

✨ Features

🔍 Image comparator

• Multi-image comparison — smooth movable sliders to reveal each image.

• Full synchronization — zoom (Ctrl + Scroll) and pan (Right-click) applied to all images at once.

• Blink mode — hold Space to instantly toggle the reference image.

• Intelligent auto-alignment — automatically aligns slightly shifted images (2D affine algorithm).

• Heatmap analysis — cumulative thermal map to visualize differences.

• Professional export — clean 1:1 images (JPEG, PNG, animated GIF) with customizable labels and watermark.

• Windows context menu — start a comparison or quick export straight from Explorer.

🧩 Image compilation (new in v2.0)

• Grid templates — 7 built-in layouts (2, 3, 4, 6, 9 cells) + an editor to create and save your own.

• Drag & drop per cell — drop each image directly into the cell you want.

• Output formats — ready-made presets (covers, 16:9, square, portrait…) or free pixel dimensions, with ratio lock and width/height swap.

• Image adjustment — reposition an image within its cell by dragging, zoom with the scroll wheel.

• Swapping — exchange two cells with a Ctrl + drag.

• Optional separator — bars between cells, adjustable color and thickness.

• Per-cell labels — click a label to choose its text: automatic (file name), favorite name or manual input.

• Automatic export — clean 1:1 save into your images' folder.

⚙️ Comfort & customization

• Tabbed interface — smooth switching between Comparator and Compilation.

• Centralized settings — ⚙ button always available.

• Multilingual — native French and English, automatic system-language detection.

• Community translation — export a language file, translate it, import it back.

🖼️ Screenshots

🚀 Installation

1. Requirements

Make sure Python 3 is installed, then install the dependencies:

pip install -r requirements.txt

2. Run

python comparateur_app.py

3. Windows context menu integration (optional)

Integration is automated and portable:

1. Double-click install_raccourcis.bat.

2. The script automatically detects the folder location.

3. Choose the menu language (1 = French, 2 = English).

4. Done. If you move the folder, just run the .bat again.

Important — always use install_raccourcis.bat, which adapts to the real folder location. Do not import a .reg file: a .reg contains a fixed path that will not match your machine.

To remove the menu: double-click desinstaller_raccourcis.bat.

⌨️ Keyboard shortcuts

Shortcut Action Space (hold) Blink mode: show reference image Ctrl + Scroll Zoom in / out Right-click (hold) Pan the view Delete Remove the selected item Ctrl + C Copy the view to clipboard Ctrl + S Open the export dialog Click (compilation) Select a cell Drag (compilation) Reposition the image in its cell Ctrl + Drag (compilation) Swap two cells

💡 A full list is also available inside the app, under ⚙ Settings.

https://github.com/NyxAwroo/Before-After_images_compare