AI Text Expander — AI Commands in Every Desktop App

Traditional text expanders retrieve fixed snippets. Lightning Assist goes further — it combines snippet expansion with built-in AI commands that rewrite, enhance, translate, and generate text on the fly, directly in whatever application you are using. No browser tab switching, no copy-pasting into ChatGPT.

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AI commands • Snippets • Voice-to-text • Windows, Mac & Linux • No credit card

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Static Snippets + Dynamic AI — Both in One Tool

Lightning Assist handles two kinds of text expansion:

Static Snippets

Type a short trigger and press your expand key — your saved snippet replaces it instantly. Perfect for email signatures, canned replies, code templates, standard phrases, and anything you type repeatedly word-for-word.

AI Commands

Select any text in any application and press an AI hotkey. Choose a command — rewrite, make professional, translate, summarise, or a custom prompt — and the result appears instantly. No browser, no copy-paste.

AI Commands You Can Use Right Now

Rewrite & Improve

Select a rough draft, press the hotkey, get a cleaner version — in your email client, Slack, or wherever you wrote it.

Adjust Tone

Make text more professional, more casual, more concise, or more detailed with a single command.

Translate

Translate selected text into any language directly in the active application without switching tools.

Summarise

Condense long text to a bullet summary — useful for meeting notes, articles, or long messages.

Generate from Prompt

Trigger a custom AI prompt with a hotkey to generate new content — emails, replies, descriptions, and more.

Custom Commands

Create your own AI command templates with specific instructions and assign them to hotkeys for instant access.

Why Not Just Use ChatGPT?

ChatGPT is powerful but slow for everyday writing tasks. The workflow is:

  1. Switch to browser tab
  2. Open ChatGPT
  3. Paste your text
  4. Describe what you want
  5. Wait for response
  6. Copy the result
  7. Switch back, paste

Lightning Assist AI commands: select text → press hotkey → done. Same result, a fraction of the friction. And it works in any application, not just where you can open a browser tab.

Works in Every Desktop App

Lightning Assist is a native desktop app. AI commands work in:

  • Email clients — Outlook, Thunderbird, Apple Mail, Gmail in browser
  • Code editors — VS Code, JetBrains IDEs, Sublime Text, Neovim
  • Chat & messaging — Slack, Teams, Discord, Telegram desktop
  • Documents — Word, Google Docs, Notion, Confluence
  • CRM & support tools — HubSpot, Salesforce, Zendesk, Intercom
  • Terminals — any text input on the command line

Start Using AI Commands Today

14-day free trial, all features included, no credit card required. Windows, Mac & Linux.

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Frequently Asked Questions

What is an AI text expander?

An AI text expander combines traditional text expansion (typing a short shortcut that expands into a full snippet) with AI-powered commands that can generate, rewrite, enhance, or translate text on the fly. Instead of only retrieving static saved snippets, an AI text expander can adapt, improve, and create content dynamically based on context.

How does AI text expansion work in Lightning Assist?

Lightning Assist has two AI modes: static snippets (type a trigger, get a fixed expansion) and AI commands (select any text and press a hotkey to rewrite, enhance, translate, summarise, or generate new content). AI commands work in any application — press the hotkey, choose the command, and the result replaces or follows your selected text instantly.

Does the AI work in every application?

Yes. Lightning Assist is a native desktop app, so AI commands work system-wide — in your email client, word processor, code editor, chat apps, browser, terminal, and anywhere else you type. There is no copy-pasting into a web interface required.

What AI commands are available?

Lightning Assist includes AI commands for rewriting, tone adjustment, enhancement, translation, summarisation, and custom prompts. You can also create your own AI command templates with specific instructions and trigger them with a hotkey.

Is Lightning Assist only an AI tool, or does it also do traditional text expansion?

Both. Lightning Assist is first and foremost a text expander — you can have hundreds of static snippets triggered by shortcuts. AI is an additional layer on top. Many users use snippets for fixed, frequently repeated text and AI commands for situations where the output needs to vary or be improved.

How does it compare to using ChatGPT for text editing?

ChatGPT requires you to switch to a browser tab, paste your text, describe what you want, copy the result, and paste it back. Lightning Assist AI commands do all of this in place — select text in any app, press a hotkey, and the result appears where your cursor is. It is dramatically faster for everyday writing tasks.

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