Presswell Alt Text Generator

Presswell Alt Text Generator helps teams reduce accessibility backlog by generating descriptive alt text for new and existing images. Connect a provider, choose a model, and run generation workflows directly inside wp-admin.

Features

• Supports OpenAI, Anthropic Claude, and Google Gemini through WordPress AI Connectors (recommended, WordPress 7.0+) or, deprecated, with API keys stored by the plugin

• On WordPress 7.0+, can send requests through the WordPress AI Client, so the plugin stores no key

• Generates alt text for individual images in the Media Library, the media modal, and the Image block

• Generates alt text for new uploads automatically (optional)

• Processes missing-alt backlogs in batches with a dedicated bulk queue

• Writes alt text in your site’s language

• Restores the previous alt text if a regeneration isn’t an improvement

• Handles provider rate limits and quota errors with automatic pauses

• Provides a customizable prompt seed for output consistency

Media Library Tools

An Alt Text column shows each image’s alt text, and a “Generate Alt Text” or “Regenerate Alt Text” row action updates it in place. The same button appears in the media modal and on the attachment edit screen, along with “Restore previous alt text” after a regeneration.

Block Editor

Select an Image block to find an Alt Text Generator panel in its sidebar. It fills in the block’s alt text and updates the image in the Media Library.

Bulk Generator

The Bulk page counts images missing alt text, allows regeneration preferences, and runs batches while surfacing progress, failures, and rate-limit pauses.

Debug Tab

Settings -> Alt Text Generator -> Debug shows how requests are sent and what can stop them (API key, rate limits, bulk runs, images missing alt text), a Test Connection button, and the private debug log.

Connector Source

0+) are the recommended setup and the default for new installs. The Plugin connector source, which stores API keys in this plugin’s settings, is deprecated and will be removed in a future release; the settings screen shows a warning while it is selected. On WordPress versions without AI Connectors, the plugin keeps using its own keys.

Documentation

Filters

• pwatg_available_services — Modify the available AI providers

• pwatg_available_models — Modify the available models for a provider (receives the models and the provider slug; the first model is the default)

• pwatg_provider_registry — Map provider slugs to custom service classes

• pwatg_generate_on_upload — Return false to skip generating alt text for a new upload (receives the attachment ID)

• pwatg_debug_log_max_bytes — Size at which the debug log rotates (default 5 MB)

• pwatg_image_max_dimension — Long edge, in pixels, of the image copy sent to the provider (default 1024)

• pwatg_alt_text_language — Language the alt text is written in (defaults to the site language; return an empty string to leave it to the model)

• pwatg_include_filename_in_prompt — Return false to leave the image’s filename out of the prompt (receives the attachment ID)

• pwatg_use_wp_ai_client — Return false to call the provider directly instead of through the WordPress AI Client in Core mode (receives the provider ID)

• pwatg_core_connector_service_map — Map WordPress AI Connector IDs to this plugin’s provider slugs

• pwatg_service_connector_candidates — Connector IDs checked for each provider’s API key

• pwatg_debug_log_filename — Filename of the private debug log

• pwatg_status_rows — Rows of the Debug tab’s status table (each an array with string label and value, and status of ok, warning, or an empty string; rows without a string label and value are dropped)

WP-CLI

If WP-CLI is available, you can run single-image generation, bulk generation, and missing-alt counts from the command line:

• wp pwatg generate <attachment-id>

• wp pwatg bulk-generate

• wp pwatg count-missing

• wp pwatg network-bulk-generate

Optional CLI flags:

• wp pwatg generate <attachment-id> --force

• wp pwatg bulk-generate --force — reports how many images would be overwritten; add --dry-run=false to generate

• wp pwatg bulk-generate --dry-run

• wp pwatg bulk-generate --limit=<int>

• wp pwatg bulk-generate --missing-only

• wp pwatg network-bulk-generate --force — a dry run unless --dry-run=false is given

• wp pwatg network-bulk-generate --limit=<int>

• wp pwatg network-bulk-generate --missing-only

• wp pwatg network-bulk-generate --sites=<id,id,...>

Privacy

This plugin sends images to the AI provider you choose when generating alt text (OpenAI, Anthropic, or Google Gemini). Generation happens when you ask for it, and for new uploads when Generate on Upload is on. In the deprecated Plugin mode, API keys are stored in WordPress options on your site (or your network, when network-activated on Multisite) and used only for requests your server sends to that provider.

External Services

This plugin connects to an external AI service only when alt text is generated (on request, or for new uploads when Generate on Upload is on) or when you use Test Connection. Only the provider selected in the plugin settings is contacted. 0+, the request is sent through the WordPress AI Client using the connection set up in Settings -> Connectors.

This plugin sends the following data:

• The API key, in the provider’s authentication header

• The selected model name

• The prompt: your prompt seed, the site language, and a short plain-text version of the image’s filename (leave it out with the pwatg_include_filename_in_prompt filter)

• For alt text generation: a copy of the image, resized to about 1024 pixels and converted to JPEG when the provider doesn’t accept its format, encoded as base64

• For Test Connection: a short text prompt (“Reply with: OK”)

OpenAI API

• Terms: https://openai.com/policies/terms-of-use

• Privacy: https://openai.com/policies/privacy-policy

Anthropic API

• Terms: https://www.anthropic.com/legal/commercial-terms

• Privacy: https://www.anthropic.com/privacy

Google Gemini API

• Terms: https://ai.google.dev/terms

• Privacy: https://policies.google.com/privacy