> ## Documentation Index
> Fetch the complete documentation index at: https://docs.runpulse.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Word-Level Review Overlays

> Use word-level bounding boxes for source-grounded review, QA, and redaction previews.

## Goal

Return word coordinates so your app can highlight exact words on the source PDF, not just larger text blocks.

## Sample Document

Use the [Bank Statement](https://platform.runpulse.com/dashboard/examples/637e5678-30b1-45fa-acc4-877f2d636419) to test overlays on dense tabular text.

<img src="https://mintcdn.com/pulseai/OJ897TEZf8bV6lk8/images/platform/word-level-bbox-output.png?fit=max&auto=format&n=OJ897TEZf8bV6lk8&q=85&s=a32a03a841e594c3ecf34a829d1efb4b" alt="Bank statement with word-level bounding boxes overlaid" width="705" height="893" data-path="images/platform/word-level-bbox-output.png" />

## Request

```bash theme={null}
curl -X POST https://api.runpulse.com/extract \
  -H "x-api-key: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "file_url": "https://platform.runpulse.com/api/examples/637e5678-30b1-45fa-acc4-877f2d636419/pdf",
    "extensions": {
      "alt_outputs": {
        "wlbb": true
      }
    },
    "storage": {"enabled": true}
  }'
```

## When To Use It

| Use case          | Why word boxes help                                              |
| ----------------- | ---------------------------------------------------------------- |
| Redaction preview | Highlight exact words before applying a redaction layer.         |
| Reviewer UI       | Jump from extracted value to exact source words.                 |
| OCR QA            | Compare expected values against word coordinates and confidence. |
| Evidence packs    | Preserve a visual trail for downstream audits.                   |

## Checks

* Word-level boxes are PDF-only.
* Results are larger; avoid enabling this on every ingestion job.
* For many products, standard bounding boxes are enough.
* Store page number, polygon/box coordinates, and extraction ID with review annotations.
* Test overlays at multiple zoom levels before users rely on them for redaction.

## Related

<CardGroup cols={2}>
  <Card title="Word-Level Bounding Boxes" icon="scan-text" href="/concepts/processing-parameters-word-level-bounding-boxes">
    Word-level option details.
  </Card>

  <Card title="Bounding Boxes" icon="draw-polygon" href="/api-reference/bounding-boxes">
    Standard bounding box format.
  </Card>
</CardGroup>