Social Bio Generator
A bio has one job: say who you help, what you help them do, and what to do next — inside a character limit most bios run out of before the third part.
- Free plan
- No card required
- Per-network limits
Generating runs on your Mediux account. The free plan includes 10 AI generations a month with no card — enough to try this properly.
Example outputSample
- Instagram · 150
🌱 Refillable cleaning, minus the plastic 🇬🇧 Made in the UK, shipped in 48h 👇 Start with the £12 starter kit
- TikTok · 80
Refills that cut your plastic by 80% 🌱 Starter kit below 👇
- LinkedIn headline · 220
Helping households cut packaging plastic by 80% | Founder at [Brand] | UK-made refillable cleaning products, shipped in 48 hours
Bio limits, per network
| Network | Limit | Worth knowing |
|---|---|---|
| 150 characters | One clickable link. Line breaks work and help a lot. | |
| TikTok | 80 characters | The tightest of the lot. One idea only. |
| X (Twitter) | 160 characters | Searchable — keywords here genuinely surface you. |
| LinkedIn headline | 220 characters | Shown beside every comment you leave. Highest-leverage text on the platform. |
| YouTube channel | 1,000 characters | Only the first ~150 show before 'more'. |
| 500 characters | Indexed by Pinterest search — write for keywords. |
The three-part structure
Who it is for
Name the person, not the category. The reader is deciding whether you are for them and nothing else in the bio matters until that is answered.
What changes
The outcome, ideally with a number. 'Cut your plastic by 80%' is a reason to follow; 'sustainable cleaning brand' is a description.
What to do next
One instruction and one link. Most bios never get here, which is why most bios convert nothing.
Writing one that works
- 1
Lead with who it is for
'Refillable cleaning products for people who hate plastic' does more work than 'sustainable cleaning brand est. 2019'. The reader is deciding whether you are for them, and that is the only question.
- 2
Spend the last line on the next step
Most bios run out of characters before they ask for anything. Write the call to action first and fit the description around it, not the other way round.
- 3
Break the lines deliberately
Where line breaks are allowed, three short lines beat one dense sentence by a distance. The bio column is narrow and a wall of text there simply does not get read.
- 4
Write to the tightest limit first
Draft for TikTok's 80 characters and you will find the one sentence that matters. Expanding that for Instagram is easy; compressing a 150-character bio down to 80 means starting again.
Questions
- What should a bio actually do?
- Answer three things in order: who you help, what you help them do, and what to do next. Most bios spend their whole character budget on a description of the company and never reach the third.
- Is it free?
- Yes, on the free plan — 10 AI generations a month, no card. Each batch of bios is one generation.
- Should I use emoji?
- Sparingly, as visual structure rather than decoration. One per line as a bullet reads well in the narrow bio column; five in a row reads as noise and costs characters you do not have.
- Do keywords in a bio help discovery?
- On X, LinkedIn and Pinterest, meaningfully — those fields are searchable. On Instagram only the name field is indexed, not the bio text, so your category belongs in the name if you want it found.
- How often should I change it?
- The core line rarely — recognisable beats novel. The call to action whenever the thing you are pointing at changes, which for most businesses is every campaign.
- What about the LinkedIn headline specifically?
- It is the highest-leverage text on that platform, because it appears beside every comment you leave, not just on your profile. Treat it as an ad that runs every time you speak.
Want this built into your workflow instead of a one-off?