What a bio has to do
Most people who visit your profile arrive from a single post. They glance at your name, your bio and your pinned post, and decide in a couple of seconds whether more of your posts would be worth it. The bio's job is to answer that question before they scroll away.
A bio that converts answers four things: what you are, what you post about, who it's for, and why anyone should believe you.
The formula
Role · What you post about, for whom · Proof · One personal touch or call to action
Start with the part a stranger cares about most. For most people that's the topic, not the job title. Then add one piece of proof and, if there's room, something human or a reason to click your link. Separators like · or | keep it scannable; line breaks work too and count as one character.
Examples by archetype
Built with the formula. The names and numbers are made up; swap in yours.
- FounderFounder of Acme · Writing about building a SaaS in public for first-time founders · $12k MRR, bootstrapped · Dad of two
- CreatorCreator · Writing about youTube growth and editing for new creators · 220k subscribers · Coffee first
- DeveloperSenior engineer at Acme · Writing about typeScript, React and shipping fast for frontend devs · 2 open source libs, 9k stars · Mechanical keyboards
- DesignerProduct designer · Writing about UI, design systems and Figma for designers and founders · Ex-Acme, 40+ shipped products · Film photos
- MarketerGrowth marketer · Writing about SEO, copy and paid ads for b2B SaaS teams · Took 3 startups past $1M ARR · Runner
- WriterWriter · Writing about clear thinking and better writing for people who want to write online · 18k newsletter readers · Reading 50 books a year
- CoachCareer coach · Writing about landing tech jobs and salary negotiation for mid-career engineers · 300+ clients hired · Ex-recruiter
- InvestorPartner at Acme Ventures · Writing about pre-seed AI and dev tools for technical founders · 40 investments, 4 exits · Former founder
Want more? Browse 100 bio templates or generate 8 options from your own details in the bio generator.
Mistakes that cost follows
- A list of labels. "Husband. Father. Entrepreneur. Visionary." says nothing about what you post. Lead with the topic.
- Filler words. Passionate, enthusiast, guru, ninja, thought leader. Replace each with a fact.
- Hashtags. Hashtags in a bio rarely bring follows, and they make it read like spam.
- No proof. A number, a company or a result does more than any adjective. "$12k MRR" beats "successful founder".
- Inside jokes. A stranger reads your bio for two seconds. If it needs context, it doesn't work.
- Out of date. An old job or a launched-and-closed product tells visitors the account is stale.
Every profile field and its limit
| Field | Limit | What to put there |
|---|---|---|
| Display name | 50 characters | Your name, or name plus one keyword ("Ada · Design systems"). People search names. |
| Username | 4 to 15 characters | Short, easy to say, no numbers people have to guess. Check it with the username checker. |
| Bio | 160 characters | Who you are, what you post, who it's for, why to believe you. |
| Location | 30 characters | A city helps local follows. Some people use it for a short line instead. |
| Website | One link | Point it at the one thing you want visitors to do: newsletter, product, portfolio. |
| Profile photo | 400 × 400 recommended | Your face, close up, plain background. It shows at tiny sizes next to every post. |
| Header | 1500 × 500 | Say what you do or show your product. Keep text out of the bottom left, where the photo sits. |
Make the header with the header maker, and check a new handle with the username checker.
Your pinned post finishes the job
The bio makes a promise; the pinned post proves it. Pin the post that best shows what following you gets someone: your best thread, a result, or a short intro to what you're building. If your top post is a year old, it's time for a new one.
When to update it
Rewrite your bio when your focus changes, when you have a new number worth showing, and whenever profile visits stop turning into follows. Test one change at a time for a couple of weeks, so you can tell what helped.
BuzzyX charts your follower trend from your real X analytics, so you can see whether a new bio moved anything. Try it free.