Sada Files
  1. 1Choose file
  2. 2Adjust
  3. 3Download

Check a public page

Enter a URL in the settings and run the check. Our server fetches the page through an SSRF-safe fetcher, analyses it in memory and stores nothing.

Fetched by our server — public addresses only, nothing stored or logged.

Image SEO & Alt Text Auditor online, free

Scan page images for missing alt attributes, descriptive filenames, next-gen WebP/AVIF formats, and dimension tags to prevent CLS.

  • Runs in your browser — no upload
  • Free, no sign-up, no watermark
  • HTML
  • TXT
How to use Image SEO & Alt Text Auditor · Image SEO & Alt Text Auditor — frequently asked questions

How to use Image SEO & Alt Text Auditor

  1. 1

    Add your HTML and TXT file

    Drop a file on the page, paste it, or click Select Files. Nothing is uploaded — it opens straight in your browser.

  2. 2

    Fine-tune the settings

    Set source mode in the Fine-tune panel, or keep the defaults — they suit most files.

  3. 3

    Run Image SEO & Alt Text Auditor

    Press the start button. Processing happens on your device, usually in seconds.

  4. 4

    Download the result

    Save the finished file, or continue with another tool without downloading in between.

What Image SEO & Alt Text Auditor can do

  • Source Mode: url and paste
  • Private by design — files are processed in your browser and never uploaded
  • Free with no sign-up, no watermark and no daily limit

Image SEO & Alt Text Auditor — frequently asked questions

Why is image alt text critical for search engines and accessibility?

Alt text describes the visual content of an image for visually impaired visitors using screen readers. Search engines also read alt text to understand what an image depicts, directly influencing rankings in Google Image Search.

What issues does the Image SEO Auditor flag?

The tool detects missing alt attributes, empty alt strings on non-decorative images, redundant filenames used as alt text, missing `width` and `height` attributes that cause Cumulative Layout Shift (CLS), and heavy uncompressed image formats.

How does missing image dimensions cause Cumulative Layout Shift?

When an `<img>` tag lacks explicit `width` and `height` attributes (or CSS aspect-ratio), the browser cannot allocate layout space before the image downloads. Once loaded, the page suddenly shifts downward, harming your Core Web Vitals score.

Can I audit images by pasting HTML without an active web server?

Yes. Paste your HTML markup into the Paste mode tab to audit all image tags locally on your device without making outbound network requests.

Does this tool download or store the images from my website?

No. The audit inspects only the HTML tags and metadata of the images. No image files are stored, mirrored, or logged on our servers.

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