accessibility_newAccessibility Aid

Image Accessibility Review Tool

Analyze images for contrast issues, simulate color-blindness impact, and review alt-text quality. An accessibility guidance tool — not a compliance certifier. Processed locally in your browser.

Checks

Contrast, Color Blindness, Alt Text

Simulations

Protanopia, Deuteranopia, Tritanopia

Processing

100% Local

Export

Text Report

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Disclaimer

This tool provides accessibility guidance only. It does not certify WCAG compliance. Automated checks cannot replace testing with real assistive technology users.

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Upload Image for Review

Drag & drop or click to upload. Processed entirely in your browser.

Select File

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Image Converter

Convert images to accessible web formats.

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DPI Checker

Check image resolution for optimal display.

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Format Compatibility Checker

Check web format support across browsers.

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Remove Metadata

Strip EXIF data from images for privacy.

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Performance Auditor

Audit image performance.

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Key details

Supported Formats

JPEG, PNG, WEBP, GIF

Processing

Client-side (in-browser)

WCAG Standard

2.1 (AA & AAA)

Color Profiles Simulated

Protanopia, Deuteranopia, Tritanopia

Export Format

Plain Text (.txt)

How it works

Upload Image

Select an image to analyze for accessibility.

Check Contrast

Pick colors from the image to check against WCAG 2.1 contrast ratio guidelines.

View Color-Blind Simulations

See how your image looks to users with various forms of color vision deficiency.

Review Alt Text

Draft and review alternative text descriptions against best practices.

Frequently asked questions

What contrast ratio do I need?

WCAG 2.1 AA requires a contrast ratio of at least 4.5:1 for normal text and 3:1 for large text. AAA requires 7:1 for normal text and 4.5:1 for large text.

What is color-blindness simulation?

It applies specific color transformation matrices to simulate how the image would appear to someone with Protanopia (red-blind), Deuteranopia (green-blind), or Tritanopia (blue-blind).

What makes good alt text?

Good alt text is concise (usually under 125 characters), describes the meaning or context of the image rather than just its visual appearance, and avoids redundant phrases like "image of" or "picture of".

Does this certify WCAG compliance?

No. This tool is meant to provide accessibility guidance and help identify potential issues. Automated checks cannot replace testing with real assistive technology users or formal accessibility audits.

Can I export the results?

Yes, you can click the "Export Report" button to download a plain text report summarizing the contrast analysis and your drafted alt text.

Does this tool replace a full accessibility audit?

No. It is a practical first-pass check. Review the surrounding page, keyboard behavior, semantics, and real assistive-technology output before publishing.

Should decorative images have alt text?

Purely decorative images usually need empty alt text so screen readers skip them. Images that communicate information need concise alt text describing their purpose.

Bharat Kumar G.verified

Technical SEO & Document Processing Expert

Bharat is the founder of ReadyToSubmit. With years of experience in technical web development, he builds privacy-first, client-side tools to help Indian government exam aspirants format their applications accurately and securely without server uploads.

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