Bios fail when they list job titles instead of telling a visitor — who looked at it for under 2 seconds — why to follow. “Senior PM at Acme. Thoughts are my own.” earns zero follows; “I help SaaS PMs ship faster: 3-min reads, mid-week, from someone who’s done it” earns the click. The 12 prompts below force a clear value proposition tuned to each platform’s exact character limit and audience. Pair them with personal brand prompts for the broader positioning work.
TL;DR
- Every prompt below produces 4-5 variants so you can pick, not settle. Paste your raw notes into the
[persona]placeholder. - A bio’s job is one thing: answer “why follow you” in the time it takes to scan one line. Niche + who you help + one proof signal beats any list of titles.
- Character limits are tight and platform-specific. The table below carries the verified June 2026 numbers — the prompts already enforce them.
- Any current model handles bio writing well. GPT-5.5 (ChatGPT default), Claude Sonnet 4.6, and Gemini 3.1 Pro all work; ask for variants and a one-line rationale per variant so you can judge fit, not just style.
Platform character limits (verified June 2026)
| Platform | Bio limit | What counts / gotchas |
|---|---|---|
| X (Twitter) | 160 chars | Every link counts as 23 chars (t.co shortening); each emoji counts as 2 |
| 150 chars | Includes letters, spaces, emoji, line breaks — everything | |
| TikTok | 80 chars | A rollout to 160 is reaching some accounts; assume 80 unless yours shows more |
| LinkedIn headline | 220 chars | Only ~60-70 chars show in search results and connection requests |
| LinkedIn About | 2,600 chars | Only ~300 chars show before the “See more” cutoff — front-load the hook |
| Threads | 150 chars | Mirrors Instagram |
| Bluesky | 256 chars | More room than X; still lead with the value line |
Two rules the limits imply: put your single strongest claim in the first ~60 characters everywhere (that is all most surfaces preview), and never spend scarce characters on “thoughts are my own” or a bare job title.
1. X / Twitter bio (160 chars)
Write 5 X / Twitter bios for [persona]. ≤160 chars including any link
(treat a URL as 23 chars). Each: who I help + how + 1 proof signal +
optional link. No "thoughts are my own" filler, no emoji-only lines.
Return a per-bio char count.2. Instagram bio (150 chars)
Write 5 Instagram bios for [creator type]. ≤150 chars total (line breaks
count). Format: 1 line on niche, 1 line on what followers get, 1 link CTA.
Avoid generic "lover of [things]". Return a char count per bio.3. TikTok bio (80 chars)
Write 5 TikTok bios for [persona]. ≤80 chars. Each must communicate niche
+ value + link in a mobile-first scan. No emoji clutter. Also give one
160-char version per bio in case my account has the expanded limit.4. LinkedIn headline (220 chars)
Write 5 LinkedIn headlines for [role / freelancer / founder]. ≤220 chars,
but make the first 60 chars stand alone (that is all that shows in search
and invites). Format: who I help + outcome I deliver + 1 specific signal
(industry / niche / scope). Avoid "Helping companies grow with passion".5. LinkedIn About section (2,600 chars)
Write the LinkedIn About section for [persona]. ≤2,600 chars, and put the
hook in the first 300 chars (everything after is hidden behind "See more").
Format: who-I-help opener (1 short paragraph), proof / results with metrics
(1 paragraph), what I'm working on now (1 paragraph), CTA. Skimmable.6. Newsletter bio for the email footer
Write a 2-sentence newsletter bio for an email footer. Persona: [persona].
Format: who I am + what I write about + where else to find me. ≤60 words.7. Cross-platform consistency check
Below are my current bios across X, Instagram, LinkedIn, and TikTok. Audit
consistency: same niche claim, same proof, same link strategy. Flag any
contradictions, then suggest revisions that keep each platform's length
limit (X 160, IG 150, TikTok 80, LinkedIn headline 220).
[paste]8. Career-switcher bio
I am switching from [old field] to [new field]. Write 4 bios for X and
LinkedIn that signal credibility in the new field without erasing prior
credibility. ≤160 chars for X, ≤220 for the LinkedIn headline.9. Personal-brand bio (no day job)
I do not want to lead with my day job. Write 5 bios that lead with the
work I want to be known for: [creator work]. Persona signals: [paste].
Each ≤160 chars.10. Bio plus pinned-post combo
Write my X bio (≤160 chars) plus the pinned post that should accompany it.
The pinned post should expand on the bio's claim with 1 proof story or 1
useful piece of work. Keep the pinned post under 280 chars.11. Job-search-mode bio
I am open to [role] opportunities. Write 4 bios for LinkedIn and X that
signal availability without "looking for next opportunity" desperation.
Lead with the work; signal openness in the last clause only.12. Founder bio for B2B credibility
I am the founder of [company]. Write 4 bios that establish B2B credibility:
company name, what we do, the persona we serve, 1 traction signal. ≤160
chars for X, ≤220 for LinkedIn headline.How to get sharper output
- Feed real input. The placeholder
[persona]should become 3-4 lines of raw notes (what you do, who you serve, one number you’re proud of). Vague input gets vague bios. - Ask for a rationale. Add “one sentence on why each works” so you can judge positioning, not just wording.
- Run a second pass against the limit. Models occasionally overshoot the count; the prompts here ask for a per-bio character count so you can catch it before pasting.
- Test the first 60 characters alone. On X, LinkedIn search, and most previews, that is the part people actually read.
Common mistakes
- Listing job title plus company only — that’s a business card, not a follow magnet.
- Generic “passionate about” or “lover of coffee, dogs, growth” filler.
- “Tweets are my own” eating scarce characters (that’s 17 of your 160 on X).
- The same bio pasted across very different platforms — LinkedIn formality dies on TikTok.
- No clear “why follow me” signal; readers scan in ~2 seconds and bounce.
- A link in bio pointing at a homepage instead of one targeted destination.
FAQ
What is the bio character limit on each platform in June 2026? X (Twitter) 160, Instagram 150, TikTok 80 (a 160-char expansion is rolling out to some accounts), LinkedIn headline 220, LinkedIn About 2,600, Threads 150, Bluesky 256. Always write to the smaller number you actually see in your editor.
Why do these prompts ask for the first 60 characters to stand alone? Because most surfaces truncate. LinkedIn shows ~60-70 characters of your headline in search and invites, and only ~300 characters of your About before “See more.” Front-loading the hook means the preview still sells you.
Should I use emoji in my bio? Sparingly. On X each emoji counts as 2 characters against your 160, and an emoji-only line says nothing. One emoji as a visual anchor is fine; a row of them is clutter that wastes your tightest resource.
Which AI model should I use for this? Any current model is fine for short-form copy. GPT-5.5 (the ChatGPT default as of April 2026), Claude Sonnet 4.6, and Gemini 3.1 Pro all produce solid variants. The difference is in your prompt, not the model — give real input and ask for several options plus a rationale.
Can I reuse one bio everywhere? No. The niche claim and proof signal should stay consistent (that is what the cross-platform audit in prompt 7 checks), but tone and length must change per platform. A 220-char LinkedIn headline truncated into an 80-char TikTok bio reads as filler.