# Image Information Inspector

Read decoded dimensions, file size, format and alpha presence.

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

Category: Image Preparation

An image's extension alone does not explain its decoded dimensions or format.

Inspect the source before deciding whether it needs resizing, conversion or compression.

## 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

The reported properties give an explicit basis for checking upload requirements.


## Before relying on the result

Compare the finished picture with its source. Read the reported sampling basis. It should not be treated as proof of every pixel's transparency state.

## Questions

### Is alpha information a full scan of every visible pixel?

Read the reported sampling basis. It should not be treated as proof of every pixel's transparency state.

### Do I need to review the output?

The reported properties give an explicit basis for checking upload requirements. Inspect the source before deciding whether it needs resizing, conversion or compression.

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.