Free tweet generator: post ideas that fit X’s 280 limit
Describe what you want to say and get post options for X, each counted the way X counts, so none is over the limit. Free, no sign-up, written by AI.
By Mellow · UpdatedTweet generator
Example (written by hand, not by the generator)
One caption, three limits. The counter now shows X, Threads and Bluesky side by side, so you know which one you are over before you post.
Writing for X and Bluesky at once? Paste the text once and see what each network would cut.
The limits it counts against
| Network | Limit | Where it comes from |
|---|---|---|
| X | 280 weighted; X Premium subscribers up to 25,000 | X Help Center: X Premium read 1 October 2026 |
| Threads | 500, with an emoji counted as its UTF-8 bytes; no more than 5 links | Meta for Developers: Threads posts read 1 October 2026 |
| Bluesky | 300 graphemes (Unicode grapheme clusters) | Bluesky documentation: intent links, on post length read 1 October 2026 |
Each figure is the network’s own, from its help or developer pages. The count under a result is on the network’s own scale, not a plain character count where the two differ.
What this generator does, and what it does not
- It writes options, not promises. It is told to promise no result, to state no figure about reach or popularity, and to invent no fact about you. An option that does is dropped.
- It does not post. Nothing here connects to an account. You copy a result and publish it yourself, or schedule it in Hub.
- It does not know you. It sees only what you type. Add the detail that is true of you; the details are what a reader keeps.
- It is free and needs no account. Each browser has a small daily allowance, shown above the results. The counters and checkers on the other free tools have no allowance: they run in your browser.
Questions
How does X count characters?
By weight, not by letters: 280 weighted; X Premium subscribers up to 25,000. The number under each option is X’s weighted count, so a link or an emoji is counted the way X counts it.
Is X’s limit still 280?
For most accounts, yes. X’s own page (X Help Center: X Premium) is the source, read on 2026-10-01. Premium subscribers have a higher limit.
Can I post it from here?
No. This page only writes the text; it does not connect to your account. To publish, copy it, or schedule it in Mellow Hub with the rest of your posts.
Why do I sometimes get fewer than five options?
An option a network would not accept, or one that promises results, is dropped rather than trimmed to fit. A page that shows two options is showing the two that passed.
Is the text written by AI, and is anything I type kept?
Yes, it is written by an AI model, so read it before you post and change what is not true of you. Your description is sent to the model to write the options. Mellow keeps no account for this tool; it keeps a one-way hash of the question with the answer for seven days so the same question is not paid for twice. Each browser has a small daily allowance, shown on the page.
Schedule what you write in Mellow Hub
Copy a result, then schedule it with the rest of your posts. Mellow Hub publishes one post to Instagram, TikTok, YouTube, X, LinkedIn, Threads, Bluesky, Pinterest and Facebook and checks each network’s rules before anything is sent.
Schedule on Instagram and TikTokThis tool is free and needs no account. Mellow Hub is paid, after a 7-day free trial, and publishes only what you, or an assistant you have authorised, send or schedule.
Answers that go with this tool
More free tools
- LinkedIn text formatter: Bold, italic, underlined text and bullet lists for LinkedIn posts, with a preview of where the post folds.
- YouTube thumbnail maker: Make a thumbnail from your photo and a bold headline in four layouts, check it at Up next size and export 1280×720 or 4K.
- Carousel maker: Type one idea per slide and get designed carousel slides: PNGs for Instagram or a PDF LinkedIn shows as a document.
- YouTube thumbnail tester: See a thumbnail in YouTube’s home feed, search and sidebar at their real sizes, then export it at 1280×720 under 2 MB.
- Instagram grid maker: Split one image into 3, 6, 9 or 12 posts that line up on your profile, numbered in the order to post them.
- Instagram carousel splitter: Cut a wide image into seamless carousel slides at 4:5, 3:4 or 1:1, ready to swipe.
- Social media character counter: Count one post against every network’s limit at once, with X’s weighted count and Bluesky’s graphemes.
- Social media post checker: Check caption, title and media count against Mellow Hub’s input rules for each destination.
- Reels and Shorts safe zone checker: See where Instagram Reels and YouTube Shorts cover a vertical video with their buttons and captions, from the figures Meta and Google publish, and download the template.
- Video checker for Reels, TikTok and Shorts: Check a video’s length, shape, resolution and file size against each network’s limits before you post it.
- Reels and Shorts cover maker: Pick a frame from your video, add a title, see how the cover sits in the profile grid and export it at 1080 × 1920.
- Social media image resizer: Crop one picture to every network’s post, story and cover sizes at once and download them together.
- Hashtag counter: Count the hashtags and mentions in a caption against each network’s limit, drop duplicates and copy a clean set.
- Instagram font generator: Turn words into bold, italic, script and other Unicode letter styles for an Instagram bio or caption, and see what styled letters cost screen readers, search and hashtags.
- Hashtag generator: Describe a post and get hashtag sets for Instagram, TikTok, YouTube, LinkedIn, X and more, counted against each network’s limit.
- Caption generator: Describe a post, pick a network and a tone, and get captions counted against that network’s limit.
- YouTube title generator: Describe a video and get title options counted against YouTube’s title limit.
- YouTube description generator: Describe a video and get description drafts counted against YouTube’s description limit.
- LinkedIn post generator: Describe what you want to share and get LinkedIn post drafts counted against LinkedIn’s limit.