Histogram
Analyze the tonal distribution of any image by generating a detailed RGB histogram chart. Visualize the red, green, and blue channel distributions to evaluate exposure, contrast, and color balance. Processed instantly on your self-hosted server.
Features
- Separate red, green, and blue channel visualization on a single chart
- Clear histogram rendering with labeled axes and tonal range indicators
- Works with any image format and resolution supported by the platform
- Instant analysis with no external processing or API calls
- Downloadable chart image for inclusion in reports or presentations
What you can do
- Evaluating exposure and highlight clipping before finalizing a photo edit
- Comparing color balance across a series of product photos for visual consistency
- Analyzing tonal range in scanned artwork to guide color correction decisions
- Teaching photography students about exposure using visual channel breakdowns
Self-hosted. Your files never leave your network.
SnapOtter runs entirely on your own infrastructure. Files processed with Histogram are never uploaded to third-party servers. Deploy a single Docker container and process files with full privacy, no watermarks, and no usage limits. Open source under AGPL-3.0.
Frequently asked questions
- What does the histogram tell me about my image?
- The histogram shows the distribution of dark to light tones across red, green, and blue channels. Peaks at the edges indicate clipping, while the overall shape reveals exposure and contrast characteristics. Analysis runs locally on your server.
- Can I use this to compare multiple images?
- You can generate histograms for each image and compare them visually. Since SnapOtter is self-hosted, you can process as many images as needed without usage limits or uploading files externally.
- Does it modify my original image?
- No, the histogram is a read-only analysis tool. It generates a chart image without altering the original file. All processing happens on your own self-hosted SnapOtter instance.
Ready to try Histogram?
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