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Image Crossorigin Attribute Checker

Audit img crossorigin attributes against CORS headers to catch anonymous/use-credentials misconfiguration and canvas-taint risk before launch.

이 도구에 대해

Review image exports before template releases so cross-origin images use the correct img crossorigin mode, expected ACAO/ACAC headers, and safe defaults for canvas-sensitive rendering flows.

Image Crossorigin Attribute Checker is useful when image requests, canvases, or CDNs depend on the correct `crossorigin` behavior. It helps teams review whether image tags are configured in a way that supports the intended fetch mode and avoids silent rendering or export problems.

  • Parses rows in URL|image-url|crossorigin|acao|acac|status|context|bytes format and normalizes relative URLs with an optional base URL.
  • Flags missing/invalid crossorigin attributes, anonymous/header mismatches, and use-credentials configurations that violate wildcard or ACAC requirements.
  • Surfaces canvas-sensitive context risks plus per-page critical crossorigin-risk byte-budget overflow to prioritize the most impactful fixes.

사용 방법 Image Crossorigin Checker

Enter the image markup or relevant attributes, review the checker output, and compare the result against the fetch and canvas behavior you expect. If the image is used in a canvas workflow, verify both the attribute and the server headers so the browser can actually honor the intended cross-origin setup.

When this tool is useful

  • Parses rows in URL|image-url|crossorigin|acao|acac|status|context|bytes format and normalizes relative URLs with an optional base URL.
  • Flags missing/invalid crossorigin attributes, anonymous/header mismatches, and use-credentials configurations that violate wildcard or ACAC requirements.
  • Surfaces canvas-sensitive context risks plus per-page critical crossorigin-risk byte-budget overflow to prioritize the most impactful fixes.

Practical tips

    이 도구를 찾는 이유

    People search for image CORS-related checks when a front-end integration is already failing or behaving inconsistently. The page is strongest when it turns a vague browser issue into a clearer attribute-level diagnosis.

    Related search intents

    image crossorigin checker, img crossorigin attribute, image cors attribute audit, crossorigin image tag checker, canvas image cors check.

    Frequently asked questions

    What input format does this image crossorigin checker expect?

    Use one row per image in URL|image-url|crossorigin|acao|acac|status|context|bytes format. Bytes can be entered in B, KB, or MB.

    When should images use crossorigin=use-credentials?

    Only when image requests must send credentials and the response returns a non-wildcard Access-Control-Allow-Origin plus Access-Control-Allow-Credentials=true.

    What is canvas-taint risk and why should I care about it?

    Canvas taint occurs when a cross-origin image is drawn onto an HTML canvas without proper CORS configuration, making the canvas unreadable by JavaScript. This blocks features like image analysis, screenshots, and WebGL textures that rely on reading pixel data from the canvas.

    When should I use 'anonymous' versus 'use-credentials' for the crossorigin attribute?

    Use 'anonymous' when the image CDN does not require cookies or authentication headers, which covers the vast majority of public image hosting. Use 'use-credentials' only when the image server requires cookies for access control, such as gated or personalized content.

    What happens if I set crossorigin='anonymous' but the server does not send CORS headers?

    The browser will block the image load entirely, resulting in a broken image. The checker flags this mismatch so you can either add the appropriate Access-Control-Allow-Origin header on the server or remove the crossorigin attribute from the img tag.

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