Image Tools

Image Auditor

An image quality checker and metadata analyzer that lets you check image dimensions and size, review compression, and run a full image optimization audit before you publish. Every scan runs locally in your browser.

Drag and drop images here

Or tap to browse. Your files stay on this device.

About Image Auditor

Image Auditor is an image quality checker built for developers, designers, and content creators who need to check image dimensions and size before publishing. Instead of guessing whether a file is web-ready, it reads the actual pixel data to score contrast, brightness, and compression, then surfaces a plain-language optimization suggestion.

Think of it as an image metadata analyzer and a web performance image checker in one tool. Upload a single photo or a whole batch, and get an image optimization audit for each file without ever sending the image to a server.

What Gets Measured

Quality Score

A combined score based on contrast, aspect ratio, and file efficiency, so you can quickly tell excellent images from ones that need work.

Optimization Suggestions

Clear, actionable guidance on resizing or recompressing images that are larger than they need to be for the web.

Batch Auditing

Upload several images at once and switch between them with the thumbnail strip to compare a whole batch of assets.

Pixel-Level Metadata

Turn on Detailed metadata for file type, color depth, average brightness, and exact pixel count.

Who Should Use This

Web developers checking image dimensions and size before shipping a page.
Content creators auditing a batch of photos for quality and consistency.
SEO specialists looking for oversized images that slow down page load.
Designers validating exported assets before handoff.

Privacy First

Every audit runs inside your browser tab using the Canvas API. No image, file name, or metadata is ever transmitted to a server, so this tool is safe to use for confidential or unreleased visual assets.

How to Use

Add your images. Drop one or more photos into the upload area, or tap to browse for them on your device.
Run the audit. Tap Run Audit to analyze every image locally, right in your browser.
Review the score. Check the quality score, dimensions, file size, and compression status for each image.
Inspect the details. Turn on Detailed metadata for pixel-level stats like brightness and pixel count.
Apply the suggestion. Follow the optimization suggestion before you publish or upload the image elsewhere.

Frequently Asked Questions

Yes, Image Auditor is a completely free image quality checker with no daily limits or account required. You can analyze as many images as you need at no cost.

No, your images never leave your device. This image metadata analyzer runs entirely in your browser using the Canvas API, so nothing is uploaded, stored, or seen by anyone else.

It reads each file to check image dimensions and size, then measures contrast, brightness, and compression ratio to produce an overall quality score. You also get a plain-language optimization suggestion for each image.

Yes, you can upload several images together and switch between them using the thumbnail strip above the preview, with a separate quality report generated for each file. This makes it easy to compare a batch of assets before publishing them.

Oversized or poorly compressed images are one of the most common causes of slow page loads, so this web performance image checker flags files that are larger or lower quality than they need to be. Fixing flagged images typically improves load times without any visible loss in appearance.