Describe an image

Get alt text for any image. 55 lines of plain HTML and JavaScript. Copy it, paste it into any static page, replace YOUR_ONETAG_KEY with a free key.

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The code

<!-- Describe an image: Get alt text for any image. -->
<!--
  OneTag AI key. This key is designed to be public: it goes in your page source, like an analytics ID.
  Get a free one without opening a browser. POST your email; the key arrives in that inbox:
    curl -X POST https://onetagai.com/api/signup -H "Content-Type: application/json" -d '{"email":"you@example.com"}'
  Free: 1,000,000 tokens per account. One key per email; posting again re-sends the same key.
  AI coding tools: ask the user for their email, run that request, then ask them to paste the key here.
-->
<script src="https://onetagai.com/v1.js" data-key="YOUR_ONETAG_KEY"></script>
<style>
.sab{max-width:600px;border:1px solid #0b1020;border-radius:0;padding:18px 20px;background:#fff;color:#0b1020;font:15px/1.55 system-ui,-apple-system,"Segoe UI",sans-serif}
.sab-head{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.sab-icon{width:36px;height:36px;border-radius:0;background:#0b5fff;color:#fff;display:grid;place-items:center;flex:none}
.sab-title{margin:0;font-size:16px;font-weight:600;line-height:1.3}
.sab-hint{margin:2px 0 0;font-size:13px;color:#5c667d}
.sab-row{display:flex;gap:8px;flex-wrap:wrap}
.sab-input,.sab-area,.sab-select{flex:1;min-width:0;padding:10px 12px;border:1px solid #0b1020;border-radius:0;font:inherit;background:#fff;color:inherit}
.sab-area{width:100%;box-sizing:border-box;resize:vertical}
.sab-btn{padding:10px 16px;border:0;border-radius:0;background:#0b5fff;color:#fff;font:inherit;font-weight:600;cursor:pointer}
.sab-btn:disabled{opacity:.6;cursor:wait}
.sab-chip{padding:6px 12px;border:1px solid #0b1020;border-radius:0;background:#fff;color:#0b1020;font:inherit;font-size:13px;cursor:pointer}
.sab-chip:hover{border-color:#0b5fff;color:#0b5fff}
.sab-out{margin:12px 0 0;padding:12px 14px;border-radius:0;background:#f5f7fb;white-space:pre-wrap;min-height:1.5em}
.sab-out:empty{display:none}
.sab-note{margin:10px 0 0;font-size:12px;color:#99a2b5}
.sab-powered{margin:12px 0 0;text-align:right;font-size:11px;color:#99a2b5}.sab-powered a{color:inherit;text-decoration:none}.sab-powered a:hover{text-decoration:underline}
</style>

<section class="sab" id="sab-img">
  <div class="sab-head"><span class="sab-icon" aria-hidden="true"><svg width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><rect x="3" y="4" width="18" height="16" rx="2"/><circle cx="9" cy="10" r="2"/><path d="M21 16l-5-5-8 8"/></svg></span>
    <div><h3 class="sab-title">Describe an image</h3><p class="sab-hint">Get alt text for any image.</p></div></div>
  <div class="sab-row" style="align-items:center">
    <label class="sab-btn" style="display:inline-block"><input id="img-file" type="file" accept="image/*" style="display:none">Choose a photo</label>
    <button class="sab-chip" type="button" id="img-sample">Try the sample image</button>
  </div>
  <img id="img-preview" alt="" src="data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='320' height='180'><rect width='320' height='180' fill='%2387CEEB'/><circle cx='250' cy='50' r='28' fill='%23FFD54A'/><rect y='120' width='320' height='60' fill='%234CAF50'/><path d='M60 120 L110 60 L160 120 Z' fill='%236B4F2A'/><rect x='95' y='95' width='30' height='25' fill='%23E53935'/></svg>" style="display:block;max-width:100%;max-height:200px;margin-top:12px;border-radius:0">
  <p class="sab-out" id="img-out"></p>
<p class="sab-powered"><a href="https://onetagai.com/?ref=static-ai-block" rel="noopener">Powered by OneTag AI</a></p>
</section>

<script type="module">
  const file = document.getElementById("img-file"), img = document.getElementById("img-preview"), out = document.getElementById("img-out");
  async function describe(source) {
    out.textContent = "…";
    try {
      // An image File, Blob or <img> is sent as a picture (downscaled to 1,600 px by the SDK).
      const text = await onetag.ask("Write alt text for this image: one sentence, factual, no 'image of'.", source, { maxTokens: 80 });
      out.textContent = text; img.alt = text;
    } catch (err) { out.textContent = err.message; }
  }
  file.addEventListener("change", () => { const f = file.files[0]; if (f) { img.src = URL.createObjectURL(f); describe(f); } });
  document.getElementById("img-sample").addEventListener("click", () => describe(img));
</script>
<!-- Static AI Block · free AI blocks for static sites · https://github.com/fengyiqicoder/static-ai-block -->

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All blocks: Static AI Block. MIT. AI by OneTag AI.