Compare Images Online — Side by Side & Slider
Select two images to compare (processed entirely in your browser — no upload):
Free Online Image Comparison Tool — Compare Two Photos Side by Side
Compare two images online for free using three different comparison modes. Select any two images and see the differences instantly. Everything runs in your browser — your images are never uploaded to any server, making this tool fast and private.
Comparison Modes
- Side by Side — displays both images next to each other for easy visual comparison. File size, dimensions, and format information is shown below each image.
- Slider Overlay — overlays both images and provides an interactive slider that you can drag left and right to reveal each image. Perfect for comparing subtle differences in quality, color, or detail between two versions of the same photo.
- Highlight Differences — uses pixel-level comparison to generate a difference map that highlights all changed areas between the two images. Identical areas appear dark while differences are highlighted in red/white. Shows exact pixel count and percentage of changed pixels.
Use Cases
This image comparison tool is useful for photographers comparing edits, web developers checking image optimization results, designers reviewing revisions, and anyone who needs to spot differences between two images. Supports JPG, PNG, WebP, GIF, BMP, AVIF, and any image format your browser can display.
Since the comparison runs entirely in your browser using the Canvas API, there are no file size limits or upload restrictions. Large images may take a moment to process depending on your device.