# Image RGB Histogram

Measure 16 bins per channel from a bounded sample.

[Open this tool](https://whatson.pk/image-histogram-tool/)

Category: Image Preparation

A channel histogram describes a distribution of pixel values, not the subject of the photograph.

Compare the sampled RGB bins with the picture before drawing a tonal conclusion.

## Inputs and controls

* One image: JPEG; PNG; WebP. Static images. Up to 4 MiB per file, 12 MiB total and 4 million pixels per image. One source image.

## How to use

* Choose a static JPEG, PNG or WebP source. Check the displayed upload limits before processing.

* Select Prepare image. Inspect the resulting preview, dimensions and file size, then download the output you need.


## Why use this tool

Separate channel distributions make colour value patterns easier to inspect.


## Before relying on the result

Compare the finished picture with its source. Content, sampling and the intended appearance matter alongside the distribution.

## Questions

### Does the histogram prove correct exposure?

No. Content, sampling and the intended appearance matter alongside the distribution.

### Do I need to review the output?

Separate channel distributions make colour value patterns easier to inspect. Compare the sampled RGB bins with the picture before drawing a tonal conclusion.

Source page last modified (UTC): 2026-10-04T18:22:35+00:00

This profile describes the tool. It does not execute it or supply a professional certification.