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- 2Adjust
- 3Download
Image Histogram Viewer online, free
Count red, green, blue, luminance and alpha values for every image in a batch. Download a JSON report with 256 bins per channel. Includes SVG charts.
- Runs in your browser — no upload
- Free, no sign-up, no watermark
- JPEG
- PNG
- WebP
- AVIF
- GIF
- BMP
- TIFF
- HEIC / HEIF
How to use Image Histogram Viewer
- 1
Add your JPEG, PNG and WebP files
Drop one or more files on the page, paste it, or click Select Files. Nothing is uploaded — it opens straight in your browser.
- 2
Fine-tune the settings
The defaults already suit most files; change them only if you need to.
- 3
Run Image Histogram Viewer
Press the start button. Processing happens on your device, usually in seconds.
- 4
Download the result
Save the finished file, or continue with another tool without downloading in between.
What Image Histogram Viewer can do
- Private by design — files are processed in your browser and never uploaded
- Batch processing — up to 500 files at once
- Free with no sign-up, no watermark and no daily limit
Image Histogram Viewer — frequently asked questions
What does Image Histogram Viewer report?
Count red, green, blue, luminance and alpha values for every image in a batch. Download a JSON report with 256 bins per channel.
Are files uploaded?
No. Processing runs on your device. Select up to 500 supported images and download a JSON report.
How are animated images handled?
Only the first decoded frame is analyzed. Results describe decoded pixels, not encoded metadata.
How are transparent pixels counted?
Alpha zero means fully transparent, 255 means opaque, and intermediate values mean partial transparency. Color histograms exclude fully transparent pixels and count partially transparent pixels once.
Is the tool free?
Yes. No sign-up is required. Large batches depend on your device memory and processing speed.
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