How to create image alt text for SEO

Search engines now expect every visual to include thoughtful descriptions. Whether you’re shipping a new UI screen, uploading lifestyle photography, or digitizing paperwork, descriptive text helps Google, Bing, and Pinterest understand your content while keeping you compliant with WCAG. Here is a complete playbook for generating image alt text using AI Image Describer.

What algorithms look for

• Clarity: describe the primary subject and action (“Analytics dashboard highlighting MRR trends”).
• Context: mention why the image exists (“Hero banner for lifetime plan”).
• Conciseness: keep alt attributes under 120 characters; push extended context into long descriptions.
• Keywords: include focus terms once without stuffing (“ai image describer”, “image alt text generator”).

Workflow using AI Image Describer

1. Upload – drag or select any JPG, PNG, GIF, or PDF. Uploads are stored temporarily so GPT‑4o Vision can analyse them.
2. Preview – confirm the thumbnail looks correct before generating copy.
3. Generate copy – click “Generate description” to receive a long description, concise alt text, and caption. Each field follows accessibility and SEO guidelines.
4. Copy + review – use the Copy buttons to paste into your CMS. Signed-in users can revisit recent runs from the dashboard usage log.
5. Publish – update Shopify, Webflow, WordPress, or static sites with the generated text.

Naming conventions

Search engines inspect filenames too. Instead of IMG_3349.PNG, rename assets with meaningful slugs—e.g., encaptureui_A7fcok-2025-10-25-dashboard.png. Mention these identifiers once on the page or in structured data to strengthen relevance.

Example table

| Asset | Alt text | Caption | | --- | --- | --- | | Pricing upgrade banner | “Hero banner promoting lifetime plan for AI Image Describer” | “Upgrade now and add more AI Image Describer credits.” | | Mobile UI screenshot | “Screenshot of mobile editor showing dark mode controls” | “Edit alt text on the go.” | | Lifestyle photo | “Creator using a laptop to convert screenshot to text near a window” | “Convert images to copy in seconds.” |

Advanced tips

• Plan localized copy early—let us know which languages you need so we can enable upcoming multilingual prompts.
• Use structured data (ImageObject schema) to reinforce the description.
• Quarterly audits – filter Supabase logs for outdated descriptions and refresh them in bulk.

With AI Image Describer, maintaining consistent, keyword-rich alt text is no longer tedious. Drop any visual into the converter, review the results, and ship accessible, SEO-friendly imagery in minutes.