# Image Alt Text Auditor (`junipr/image-alt-text-auditor`) Actor
Find missing, weak, duplicate, or risky image alt text and image SEO/accessibility issues.
- **URL**: https://apify.com/junipr/image-alt-text-auditor.md
- **Developed by:** [junipr](https://apify.com/junipr) (community)
- **Categories:** Developer tools
- **Stats:** 2 total users, 1 monthly users, 100.0% runs succeeded, 0 bookmarks
- **User rating**: No ratings yet
## Pricing
from $4.90 / 1,000 page auditeds
This Actor is paid per event. You are not charged for the Apify platform usage, but only a fixed price for specific events.
Learn more: https://docs.apify.com/platform/actors/running/actors-in-store#pay-per-event
## What's an Apify Actor?
Actors are a software tools running on the Apify platform, for all kinds of web data extraction and automation use cases.
In Batch mode, an Actor accepts a well-defined JSON input, performs an action which can take anything from a few seconds to a few hours,
and optionally produces a well-defined JSON output, datasets with results, or files in key-value store.
In Standby mode, an Actor provides a web server which can be used as a website, API, or an MCP server.
Actors are written with capital "A".
## How to integrate an Actor?
If asked about integration, you help developers integrate Actors into their projects.
You adapt to their stack and deliver integrations that are safe, well-documented, and production-ready.
The best way to integrate Actors is as follows.
In JavaScript/TypeScript projects, use official [JavaScript/TypeScript client](https://docs.apify.com/api/client/js/docs.md):
```bash
npm install apify-client
```
In Python projects, use official [Python client library](https://docs.apify.com/api/client/python/docs.md):
```bash
pip install apify-client
```
In shell scripts, use [Apify CLI](https://docs.apify.com/cli/docs.md):
````bash
# MacOS / Linux
curl -fsSL https://apify.com/install-cli.sh | bash
# Windows
irm https://apify.com/install-cli.ps1 | iex
```bash
In AI frameworks, you might use the [Apify MCP server](https://docs.apify.com/integrations/mcp.md).
If your project is in a different language, use the [REST API](https://docs.apify.com/api/v2.md).
For usage examples, see the [API](#api) section below.
For more details, see Apify documentation as [Markdown index](https://docs.apify.com/llms.txt) and [Markdown full-text](https://docs.apify.com/llms-full.txt).
# README
## Image Alt Text Auditor
### Store Positioning
**Store title:** Image Alt Text Auditor
**Short description:** Find missing, weak, duplicate, or risky image alt text and image SEO/accessibility issues.
**SEO title:** Image Alt Text Auditor — technical SEO, web, and domain audit
**SEO description:** Find missing, weak, duplicate, or risky image alt text and image SEO/accessibility issues. Use it to find crawlability, indexability, security, metadata, and page-quality issues with evidence-backed rows and audit reports.
**Categories:** SEO_TOOLS
**Keywords:** image, alt, text, auditor, seo audit, web/domain audit
### Fixed-Inclusive PPE Pricing
This actor uses pay-per-event pricing. Event prices include Apify platform usage; users are not expected to pay a separate platform-usage pass-through charge for the configured pricing model.
- Tier: W1 — Web/domain audit
- Primary event: `page-audited` at $0.00490 base
- Default max charge: $10.00
- Store discounts: FREE/BRONZE base, SILVER discounted, GOLD deepest approved discount
Event set:
- `actor-start`: base $0.00500, GOLD $0.00400. Image Alt Text Auditor: charged when actor start is completed. The price includes Apify platform usage; no separate usage pass-through is intended.
- `page-audited`: base $0.00490, GOLD $0.00392. Image Alt Text Auditor: charged when page audited is completed. The price includes Apify platform usage; no separate usage pass-through is intended.
- `record-extracted`: base $0.00372, GOLD $0.00298. Image Alt Text Auditor: charged when record extracted is completed. The price includes Apify platform usage; no separate usage pass-through is intended.
- `finding-emitted`: base $0.00372, GOLD $0.00298. Image Alt Text Auditor: charged when finding emitted is completed. The price includes Apify platform usage; no separate usage pass-through is intended.
- `audit-report-generated`: base $0.05000, GOLD $0.04000. Image Alt Text Auditor: charged when audit report generated is completed. The price includes Apify platform usage; no separate usage pass-through is intended.
### Public Task Concepts
- Audit Image Alt Text controls on a capped public page set
- Find high-priority Image Alt Text issues before release
- Validate Image Alt Text evidence from supplied pages
- Prioritize Image Alt Text fixes with severity and proof
- Export Image Alt Text QA rows for client review
Find missing, weak, duplicate, or risky image alt text and image SEO/accessibility issues.
### What This Actor Does
Image Alt Text Auditor inspects every `img` element in supplied or fetched HTML and returns page-level QA rows with an image-by-image evidence inventory. It distinguishes missing and empty alternatives, recognizes decorative signals, and flags duplicate, generic, filename-based, overly long, and repetitive alt text.
The actor is positioned for content and accessibility quality. It includes `src`, alt text, decorative state, loading hints, dimensions, issue codes, and remediation guidance without inventing image meaning.
### What This Actor Does Not Do
- It does not provide legal, medical, financial, investment, safety, or compliance advice.
- It does not guarantee completeness of any public source or third-party dataset.
- It does not collect sensitive personal data by default.
- It does not rely on unsupported private APIs.
- It does not generate replacement alt text or infer visual content from image pixels.
### Best Use Cases
- image SEO QA
- accessibility alt-text audits
- duplicate alt text detection
### Input Fields Explained
| Field | Type | Default | Notes |
| --- | --- | --- | --- |
| `records` | array | built-in records | Page snapshots with HTML in `metadata.html` or `body`. |
| `urls` | array | [] | Public page URLs to fetch; explicit URLs override schema-populated default records. |
| `fetchUrls` | boolean | false | Fetches HTML for URL rows before image analysis. |
| `fetchTimeoutMs` | integer | 12000 | Timeout per HTML request, capped at 30 seconds. |
| `watchTerms` | array | actor defaults | Terms used to mark relevant records and alerts. |
| `includeReport` | boolean | true | Writes JSON and Markdown report artifacts to the key-value store. |
| `maxItems` | integer | 2 | Caps processed records. Maximum is 50. |
| `maxTextBytes` | integer | 500000 | Caps analyzed text per record. |
| `debug` | boolean | false | Enables debug logging. |
### Example Input
```json
{
"records": [
{
"sourceId": "image-alt-good",
"sourceUrl": "https://example.com/gallery",
"title": "Gallery with descriptive alt text",
"description": "Images include concise descriptive alt text.",
"category": "image seo",
"keywords": [],
"metadata": {
"html": "![\"Blue](\"shoe.jpg\")
![\"Trail](\"sole.jpg\")
"
}
},
{
"sourceId": "image-alt-risk",
"sourceUrl": "https://example.com/product",
"title": "Product page missing image alt text",
"description": "Hero product image has missing alt and duplicate alt text marker.",
"category": "image seo",
"keywords": [
"missing alt",
"duplicate alt"
],
"metadata": {
"html": "![](\"hero.jpg\")
![\"\"](\"thumb.jpg\")
duplicate alt"
}
}
],
"includeReport": true,
"maxItems": 2
}
````
### Output Fields Explained
| Field | Meaning |
| --- | --- |
| `auditId` | Stable hash for the checked record. |
| `sourceId`, `sourceUrl` | Source identifiers for traceability. |
| `status`, `severity`, `score` | Normalized outcome and 0-100 quality/risk score. |
| `matchedKeywords` | Watch terms found in the record text or metadata. |
| `issues`, `issueCodes` | Actor-specific findings with severity and messages. |
| `recommendations` | Next actions for the operator or content/data owner. |
| `metadata` | Original metadata plus derived helper fields when applicable. |
| `pricingTemplate`, `pricingEventName` | PPE tier and primary billed event. |
### Example Output
```json
{
"auditId": "imageal_72dece02acb31acc",
"actorSlug": "image-alt-text-auditor",
"actorName": "Image Alt Text Auditor",
"sourceType": "input",
"sourceId": "image-alt-good",
"sourceUrl": "https://example.com/gallery",
"title": "Gallery with descriptive alt text",
"status": "pass",
"severity": "none",
"score": 100,
"matchedKeywords": [],
"primaryEntity": null,
"category": "image seo",
"publishedAt": null,
"summary": "Images include concise descriptive alt text.",
"issueCount": 0,
"issues": [],
"issueCodes": [],
"recommendations": [
"Image Alt Text Auditor did not find immediate risk signals for this record. Re-run after source data changes."
],
"metadata": {
"html": "",
"htmlSignalCounts": {
"images": 2,
"inputs": 0,
"forms": 0,
"headings": 0
},
"sourceSpecific": {
"imageRows": [
{
"imageIndex": 1,
"src": "shoe.jpg",
"srcsetPresent": false,
"altText": "Blue trail running shoe side view",
"decorative": false,
"loading": null,
"width": null,
"height": null,
"issueCodes": [],
"status": "ok"
},
{
"imageIndex": 2,
"src": "sole.jpg",
"srcsetPresent": false,
"altText": "Trail shoe rubber outsole",
"decorative": false,
"loading": null,
"width": null,
"height": null,
"issueCodes": [],
"status": "ok"
}
],
"imageCount": 2,
"issueImageCount": 0
},
"normalizedTextPreview": "image-alt-good https://example.com/gallery Gallery with descriptive alt text Images include concise descriptive alt text. image seo {\"html\":\" \"}"
},
"textBytes": 265,
"checkedAt": "2026-07-02T00:00:00.000Z",
"pricingTemplate": "W1 — Web/domain audit",
"pricingEventName": "page-audited"
}
```
### Cost-Control Tips
- Keep `maxItems` small for default and scheduled checks.
- Use supplied records or snapshots for deterministic QA runs.
- Leave `fetchUrls` off unless live source fetching is explicitly needed.
- Review warning rows before increasing caps.
- Schedule small frequent runs instead of broad one-off sweeps.
### Scheduling Examples
- Daily watchlist check with two to five high-value records.
- Weekly QA run before publishing a site, data, or actor update.
- Content QA before publishing product, editorial, or landing pages.
### Public Task Examples
- Audit image alternatives on a capped public page set.
- Find missing and empty alt text before a content release.
- Detect duplicate or generic alternatives across supplied HTML snapshots.
- Export image-level evidence for accessibility remediation.
- Monitor product templates for recurring alt-quality regressions.
### FAQ
#### Can I use this with live URLs?
Yes. Supply `urls` and enable `fetchUrls`. JavaScript-injected images require rendered HTML supplied in a record.
#### Why does it charge before pushing output?
The actor charges before paid output. When the charge cap is reached, it stops cleanly without emitting unpaid rows.
#### What happens on charge limits?
The actor stops gracefully and writes a summary instead of pushing unpaid result rows.
#### Is this legal, financial, safety, or compliance advice?
No. The actor produces operational signals and structured data for review. Human owners remain responsible for decisions.
### Troubleshooting
- If the dataset is empty, check that `maxItems` is greater than zero and that records are supplied or defaults are enabled.
- If a record is flagged unexpectedly, inspect `issueCodes`, `matchedKeywords`, and the normalized metadata preview.
- If live fetching fails, rerun with supplied record bodies or snapshots and keep `fetchUrls` false.
### Limitations
The actor analyzes HTML attributes, not image pixels or surrounding visual layout. Decorative intent and the accuracy of descriptive language still require human review. JavaScript-only DOM changes are visible only when rendered HTML is supplied.
### Source And Safety Notes
Use public or permissioned pages and avoid credentials or private user data. Results support content and accessibility QA but are not a compliance certification.
### Changelog
- 2026-07-10: Added image-level alt-quality evidence, duplicate/stuffing checks, honest no-image diagnostics, and expanded regression coverage.
# Actor input Schema
## `records` (type: `array`):
Records, snapshots, or source observations to process. Defaults to a tiny deterministic fixture.
## `urls` (type: `array`):
Optional URLs reserved for live fetching when Fetch URLs is true.
## `fetchUrls` (type: `boolean`):
Fetch sourceUrl text over HTTP. Default is false for deterministic local runs.
## `fetchTimeoutMs` (type: `integer`):
Timeout for each live HTML request.
## `watchTerms` (type: `array`):
Keywords or topics used to flag relevant records.
## `includeReport` (type: `boolean`):
Write JSON and Markdown report artifacts to the key-value store.
## `maxItems` (type: `integer`):
Maximum records to process in one run.
## `maxTextBytes` (type: `integer`):
Maximum searchable text bytes per record.
## `dryRun` (type: `boolean`):
Validate input and write a dry-run summary without PPE charges or dataset output.
## `debug` (type: `boolean`):
Enable debug logging.
## Actor input object example
```json
{
"records": [
{
"sourceId": "image-alt-good",
"sourceUrl": "https://example.com/gallery",
"title": "Gallery with descriptive alt text",
"description": "Images include concise descriptive alt text.",
"category": "image seo",
"keywords": [],
"metadata": {
"html": ""
}
},
{
"sourceId": "image-alt-risk",
"sourceUrl": "https://example.com/product",
"title": "Product page missing image alt text",
"description": "Hero product image has missing alt and duplicate alt text marker.",
"category": "image seo",
"keywords": [
"missing alt",
"duplicate alt"
],
"metadata": {
"html": " duplicate alt"
}
}
],
"urls": [],
"fetchUrls": false,
"fetchTimeoutMs": 12000,
"watchTerms": [
"missing alt",
"duplicate alt",
"keyword stuffing"
],
"includeReport": true,
"maxItems": 2,
"maxTextBytes": 500000,
"dryRun": false,
"debug": false
}
```
# Actor output Schema
## `results` (type: `string`):
Structured result rows in the default dataset.
## `summary` (type: `string`):
Summary JSON in the key-value store when includeReport is enabled.
## `markdownReport` (type: `string`):
Markdown report in the key-value store when includeReport is enabled.
# API
You can run this Actor programmatically using our API. Below are code examples in JavaScript, Python, and CLI, as well as the OpenAPI specification and MCP server setup.
## JavaScript example
```javascript
import { ApifyClient } from 'apify-client';
// Initialize the ApifyClient with your Apify API token
// Replace the '' with your token
const client = new ApifyClient({
token: '',
});
// Prepare Actor input
const input = {};
// Run the Actor and wait for it to finish
const run = await client.actor("junipr/image-alt-text-auditor").call(input);
// Fetch and print Actor results from the run's dataset (if any)
console.log('Results from dataset');
console.log(`💾 Check your data here: https://console.apify.com/storage/datasets/${run.defaultDatasetId}`);
const { items } = await client.dataset(run.defaultDatasetId).listItems();
items.forEach((item) => {
console.dir(item);
});
// 📚 Want to learn more 📖? Go to → https://docs.apify.com/api/client/js/docs
```
## Python example
```python
from apify_client import ApifyClient
# Initialize the ApifyClient with your Apify API token
# Replace '' with your token.
client = ApifyClient("")
# Prepare the Actor input
run_input = {}
# Run the Actor and wait for it to finish
run = client.actor("junipr/image-alt-text-auditor").call(run_input=run_input)
# Fetch and print Actor results from the run's dataset (if there are any)
print("💾 Check your data here: https://console.apify.com/storage/datasets/" + run["defaultDatasetId"])
for item in client.dataset(run["defaultDatasetId"]).iterate_items():
print(item)
# 📚 Want to learn more 📖? Go to → https://docs.apify.com/api/client/python/docs/quick-start
```
## CLI example
```bash
echo '{}' |
apify call junipr/image-alt-text-auditor --silent --output-dataset
```
## MCP server setup
```json
{
"mcpServers": {
"apify": {
"command": "npx",
"args": [
"mcp-remote",
"https://mcp.apify.com/?tools=junipr/image-alt-text-auditor",
"--header",
"Authorization: Bearer "
]
}
}
}
```
## OpenAPI specification
```json
{
"openapi": "3.0.1",
"info": {
"title": "Image Alt Text Auditor",
"description": "Find missing, weak, duplicate, or risky image alt text and image SEO/accessibility issues.",
"version": "1.0",
"x-build-id": "Sy7EsSRcXWcoHpVK3"
},
"servers": [
{
"url": "https://api.apify.com/v2"
}
],
"paths": {
"/acts/junipr~image-alt-text-auditor/run-sync-get-dataset-items": {
"post": {
"operationId": "run-sync-get-dataset-items-junipr-image-alt-text-auditor",
"x-openai-isConsequential": false,
"summary": "Executes an Actor, waits for its completion, and returns Actor's dataset items in response.",
"tags": [
"Run Actor"
],
"requestBody": {
"required": true,
"content": {
"application/json": {
"schema": {
"$ref": "#/components/schemas/inputSchema"
}
}
}
},
"parameters": [
{
"name": "token",
"in": "query",
"required": true,
"schema": {
"type": "string"
},
"description": "Enter your Apify token here"
}
],
"responses": {
"200": {
"description": "OK"
}
}
}
},
"/acts/junipr~image-alt-text-auditor/runs": {
"post": {
"operationId": "runs-sync-junipr-image-alt-text-auditor",
"x-openai-isConsequential": false,
"summary": "Executes an Actor and returns information about the initiated run in response.",
"tags": [
"Run Actor"
],
"requestBody": {
"required": true,
"content": {
"application/json": {
"schema": {
"$ref": "#/components/schemas/inputSchema"
}
}
}
},
"parameters": [
{
"name": "token",
"in": "query",
"required": true,
"schema": {
"type": "string"
},
"description": "Enter your Apify token here"
}
],
"responses": {
"200": {
"description": "OK",
"content": {
"application/json": {
"schema": {
"$ref": "#/components/schemas/runsResponseSchema"
}
}
}
}
}
}
},
"/acts/junipr~image-alt-text-auditor/run-sync": {
"post": {
"operationId": "run-sync-junipr-image-alt-text-auditor",
"x-openai-isConsequential": false,
"summary": "Executes an Actor, waits for completion, and returns the OUTPUT from Key-value store in response.",
"tags": [
"Run Actor"
],
"requestBody": {
"required": true,
"content": {
"application/json": {
"schema": {
"$ref": "#/components/schemas/inputSchema"
}
}
}
},
"parameters": [
{
"name": "token",
"in": "query",
"required": true,
"schema": {
"type": "string"
},
"description": "Enter your Apify token here"
}
],
"responses": {
"200": {
"description": "OK"
}
}
}
}
},
"components": {
"schemas": {
"inputSchema": {
"type": "object",
"properties": {
"records": {
"title": "Records To Check",
"type": "array",
"description": "Records, snapshots, or source observations to process. Defaults to a tiny deterministic fixture.",
"items": {
"type": "object"
},
"default": [
{
"sourceId": "image-alt-good",
"sourceUrl": "https://example.com/gallery",
"title": "Gallery with descriptive alt text",
"description": "Images include concise descriptive alt text.",
"category": "image seo",
"keywords": [],
"metadata": {
"html": ""
}
},
{
"sourceId": "image-alt-risk",
"sourceUrl": "https://example.com/product",
"title": "Product page missing image alt text",
"description": "Hero product image has missing alt and duplicate alt text marker.",
"category": "image seo",
"keywords": [
"missing alt",
"duplicate alt"
],
"metadata": {
"html": " duplicate alt"
}
}
]
},
"urls": {
"title": "URLs To Fetch",
"type": "array",
"description": "Optional URLs reserved for live fetching when Fetch URLs is true.",
"items": {
"type": "string"
},
"default": []
},
"fetchUrls": {
"title": "Fetch URLs",
"type": "boolean",
"description": "Fetch sourceUrl text over HTTP. Default is false for deterministic local runs.",
"default": false
},
"fetchTimeoutMs": {
"title": "Request Timeout (ms)",
"minimum": 1000,
"maximum": 30000,
"type": "integer",
"description": "Timeout for each live HTML request.",
"default": 12000
},
"watchTerms": {
"title": "Watch Terms",
"type": "array",
"description": "Keywords or topics used to flag relevant records.",
"items": {
"type": "string"
},
"default": [
"missing alt",
"duplicate alt",
"keyword stuffing"
]
},
"includeReport": {
"title": "Include Report Artifacts",
"type": "boolean",
"description": "Write JSON and Markdown report artifacts to the key-value store.",
"default": true
},
"maxItems": {
"title": "Max Items",
"minimum": 1,
"maximum": 50,
"type": "integer",
"description": "Maximum records to process in one run.",
"default": 2
},
"maxTextBytes": {
"title": "Max Text Bytes",
"minimum": 100,
"maximum": 2000000,
"type": "integer",
"description": "Maximum searchable text bytes per record.",
"default": 500000
},
"dryRun": {
"title": "Dry Run",
"type": "boolean",
"description": "Validate input and write a dry-run summary without PPE charges or dataset output.",
"default": false
},
"debug": {
"title": "Debug Logs",
"type": "boolean",
"description": "Enable debug logging.",
"default": false
}
}
},
"runsResponseSchema": {
"type": "object",
"properties": {
"data": {
"type": "object",
"properties": {
"id": {
"type": "string"
},
"actId": {
"type": "string"
},
"userId": {
"type": "string"
},
"startedAt": {
"type": "string",
"format": "date-time",
"example": "2025-01-08T00:00:00.000Z"
},
"finishedAt": {
"type": "string",
"format": "date-time",
"example": "2025-01-08T00:00:00.000Z"
},
"status": {
"type": "string",
"example": "READY"
},
"meta": {
"type": "object",
"properties": {
"origin": {
"type": "string",
"example": "API"
},
"userAgent": {
"type": "string"
}
}
},
"stats": {
"type": "object",
"properties": {
"inputBodyLen": {
"type": "integer",
"example": 2000
},
"rebootCount": {
"type": "integer",
"example": 0
},
"restartCount": {
"type": "integer",
"example": 0
},
"resurrectCount": {
"type": "integer",
"example": 0
},
"computeUnits": {
"type": "integer",
"example": 0
}
}
},
"options": {
"type": "object",
"properties": {
"build": {
"type": "string",
"example": "latest"
},
"timeoutSecs": {
"type": "integer",
"example": 300
},
"memoryMbytes": {
"type": "integer",
"example": 1024
},
"diskMbytes": {
"type": "integer",
"example": 2048
}
}
},
"buildId": {
"type": "string"
},
"defaultKeyValueStoreId": {
"type": "string"
},
"defaultDatasetId": {
"type": "string"
},
"defaultRequestQueueId": {
"type": "string"
},
"buildNumber": {
"type": "string",
"example": "1.0.0"
},
"containerUrl": {
"type": "string"
},
"usage": {
"type": "object",
"properties": {
"ACTOR_COMPUTE_UNITS": {
"type": "integer",
"example": 0
},
"DATASET_READS": {
"type": "integer",
"example": 0
},
"DATASET_WRITES": {
"type": "integer",
"example": 0
},
"KEY_VALUE_STORE_READS": {
"type": "integer",
"example": 0
},
"KEY_VALUE_STORE_WRITES": {
"type": "integer",
"example": 1
},
"KEY_VALUE_STORE_LISTS": {
"type": "integer",
"example": 0
},
"REQUEST_QUEUE_READS": {
"type": "integer",
"example": 0
},
"REQUEST_QUEUE_WRITES": {
"type": "integer",
"example": 0
},
"DATA_TRANSFER_INTERNAL_GBYTES": {
"type": "integer",
"example": 0
},
"DATA_TRANSFER_EXTERNAL_GBYTES": {
"type": "integer",
"example": 0
},
"PROXY_RESIDENTIAL_TRANSFER_GBYTES": {
"type": "integer",
"example": 0
},
"PROXY_SERPS": {
"type": "integer",
"example": 0
}
}
},
"usageTotalUsd": {
"type": "number",
"example": 0.00005
},
"usageUsd": {
"type": "object",
"properties": {
"ACTOR_COMPUTE_UNITS": {
"type": "integer",
"example": 0
},
"DATASET_READS": {
"type": "integer",
"example": 0
},
"DATASET_WRITES": {
"type": "integer",
"example": 0
},
"KEY_VALUE_STORE_READS": {
"type": "integer",
"example": 0
},
"KEY_VALUE_STORE_WRITES": {
"type": "number",
"example": 0.00005
},
"KEY_VALUE_STORE_LISTS": {
"type": "integer",
"example": 0
},
"REQUEST_QUEUE_READS": {
"type": "integer",
"example": 0
},
"REQUEST_QUEUE_WRITES": {
"type": "integer",
"example": 0
},
"DATA_TRANSFER_INTERNAL_GBYTES": {
"type": "integer",
"example": 0
},
"DATA_TRANSFER_EXTERNAL_GBYTES": {
"type": "integer",
"example": 0
},
"PROXY_RESIDENTIAL_TRANSFER_GBYTES": {
"type": "integer",
"example": 0
},
"PROXY_SERPS": {
"type": "integer",
"example": 0
}
}
}
}
}
}
}
}
}
}
```