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

# AI Writing Assistant

> Use AI to improve, rewrite, translate, and generate content directly in the editor

<Info>
  The AI writing assistant is available on the **Growth plan** only. Upgrade your plan to unlock it.
</Info>

The AI assistant is built directly into the editor — no switching tabs or copying text. You can use it to improve selected content, change its tone, translate it, or generate titles and subtitles for your post.

## Improving selected text

Select any text in the editor and a formatting toolbar will appear. Click the **✦ Improve** button to open the AI actions menu.

The AI menu offers the following actions:

### Improve

Refines the selected text — better word choice, clearer phrasing, smoother flow — without changing the meaning.

### Simplify

Reduces complexity. Good for making technical or dense writing easier to read.

### Extend

Expands the selected text with additional detail and supporting content. Useful when a section feels thin.

### Shorten

Condenses the text while keeping the key information. Use this when something is too wordy.

### Fix Grammar

Corrects grammar, spelling, and sentence structure without changing the voice or content.

### Change Tone

Rewrites the selected text in a different tone. Available tones:

| Tone          | Best for                               |
| ------------- | -------------------------------------- |
| Professional  | Business newsletters, B2B content      |
| Formal        | Official announcements, serious topics |
| Casual        | Friendly, conversational newsletters   |
| Business      | Corporate or company updates           |
| Informative   | Educational content, how-tos           |
| Narrative     | Storytelling, personal essays          |
| Funny         | Humor-driven content                   |
| Witty         | Clever, light-hearted writing          |
| Bloggify      | Blog-style informal tone               |
| Childfriendly | Simple language, accessible writing    |
| Emojify       | Adds emojis throughout the text        |
| Memeify       | Internet culture, very casual          |

### Translate

Translates the selected text into one of 15 languages:

Arabic, Bengali, Chinese, English, French, German, Hindi, Italian, Japanese, Korean, Portuguese, Russian, Spanish, Turkish, Vietnamese.

### Custom prompt

Opens a text input where you can type any instruction — for example: *"Rewrite this as a bullet list"* or *"Make this sound more urgent."* Press **Enter** or click the send button to apply.

## How the AI applies changes

After you trigger an action, the editor enters a read-only mode while the AI processes your request. The result streams in and replaces your selected text character by character.

Once complete, you can keep the result or press **Ctrl + Z** (Undo) to go back to the original.

## Generating a title and subtitle

The AI can also suggest a title and subtitle for your post based on the content you've written.

Next to the **Title** field at the top of the editor, click the **⚙** (settings) icon. In the dropdown, click **Suggest** under the *Enhance title* section.

The AI will generate a title and stream it into the field. You'll then see three options:

* **Yes** — accept the suggestion and keep it.
* **No** — reject it and go back to what you had before.
* **↻** (regenerate) — discard this suggestion and generate a new one.

The same flow applies to the **Subtitle** field.

<Tip>
  Title and subtitle suggestions work best after you've written most of your content. The AI uses your post body to generate relevant, specific titles rather than generic ones.
</Tip>

## Using your own AI provider

By default, the AI assistant uses LetterBucket's built-in AI (included in the Growth plan). If you'd prefer to use your own API key, you can connect OpenAI, DeepSeek, or OpenRouter under [Settings → Profile → API Keys](/account/api-keys).