# Free Tools for X

Source: https://trygrowx.app/tools (updated 2026-11-04)

Free tools for writing on X: character counter, thread splitter, fonts, post mockups, engagement calculator and AI generators for posts and replies.

- [Post checker](https://trygrowx.app/tools/post-checker.md): Count characters exactly as X does, preview your post, split long text into a numbered thread and spot phrases that sound AI-written. Free.
- [Reply generator](https://trygrowx.app/tools/reply-generator.md): Paste an X post and get 3 replies that add something real. Free AI reply generator for X, no sign-up, 10 a day.
- [Fonts](https://trygrowx.app/tools/fonts.md): Turn plain text into bold, italic, script, monospace and other Unicode styles you can paste into posts, bios and names on X. Free, instant copy.
- [Post generator](https://trygrowx.app/tools/post-generator.md): Turn a topic or rough note into 3 ready-to-post X posts. Free AI tweet and X post generator, no sign-up, 10 a day.
- [Post mockup](https://trygrowx.app/tools/mockup.md): Preview your own X post as an image. Set the name, photo, text, counts, badge and light or dark theme, then download a sharp PNG. Free, in your browser.
- [Engagement calculator](https://trygrowx.app/tools/engagement-calculator.md): Work out the engagement rate of an X post from likes, replies, reposts, bookmarks and impressions or followers, with a plain-language read of the result.
- [Bio generator](https://trygrowx.app/tools/bio-generator.md): Get 5 X bio ideas in seconds, each within the 160-character limit. Free AI Twitter bio generator, no sign-up needed.
- [Hook generator](https://trygrowx.app/tools/hook-generator.md): Type a topic, get 10 opening lines for X posts: numbers, stories, questions and how-tos. Free AI hook and tweet idea generator.

Free tools for anyone who writes on X. The browser tools run entirely on your device, need no account and send nothing anywhere. The AI tools give you a few free drafts a day to try.

| Tool                                                  | What it does                                                                                                          |
| ----------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------- |
| [Post checker](https://trygrowx.app/tools/post-checker)                   | Counts characters exactly as X does, previews your post, splits long text into a thread and flags AI-sounding phrases |
| [Fonts](https://trygrowx.app/tools/fonts)                                 | Turns text into bold, italic, script and other styles you can paste into X                                            |
| [Post mockup](https://trygrowx.app/tools/mockup)                          | Makes a PNG of your own post for decks, newsletters and reviews                                                       |
| [Engagement calculator](https://trygrowx.app/tools/engagement-calculator) | Works out a post's engagement rate and what it means                                                                  |
| [Reply generator](https://trygrowx.app/tools/reply-generator)             | Paste a post, get three replies to choose from                                                                        |
| [Post generator](https://trygrowx.app/tools/post-generator)               | Turn a topic or a rough note into three posts                                                                         |
| [Bio generator](https://trygrowx.app/tools/bio-generator)                 | Write a clear X bio from a few facts about you                                                                        |
| [Hook generator](https://trygrowx.app/tools/hook-generator)               | Get opening lines that make people stop scrolling                                                                     |

Each tool is a small taste of GrowX, which drafts posts and replies in your voice every day for you to approve.