💬Social ToolkitAI
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AI bio writer for Instagram, TikTok, LinkedIn, Threads — 1 input, 4 outputs

Enter name + role + style → AI generates 4 bios simultaneously for Instagram (150 chars), TikTok (80), LinkedIn (220), Threads (150). Live char counter, copy individually, Vietnamese-natural.

1 input → 4 platformsChar counter4 stylesVietnamese

Bio style

Why use this tool

🎯
Exact char limits

Each platform has different caps: IG 150, TikTok 80, LinkedIn 220, Threads 150. AI sizes precisely — no overflow, no manual edits.

🎨
4 diverse styles

Professional (business, formal), personal brand (identity + niche + CTA), quirky (fun, character), minimalist (1-3 key words).

⚡
1 request → 4 bios

Instead of 4 separate generations, 1 request returns JSON of 4 platforms at once. Saves 3 quota slots.

How to use

  1. 1Enter your real name or nickname (e.g. 'Minh Nguyen', 'Mèo Béo Studio').
  2. 2Enter your role/title short (e.g. 'Solo SaaS Builder · Indie Dev').
  3. 3(Optional) Add 3-5 key keywords comma-separated (e.g. 'AI, Next.js, Vietnam').
  4. 4Pick style: Professional / Personal brand / Quirky / Minimalist.
  5. 5Click Generate. After 2-3s → tabs for 4 platforms with bio + live char counter. Switch tabs to view, Copy to save.

Why social media bios matter

A bio is the first impression on social. Users click your profile, read the bio in 3 seconds, then decide to follow or swipe away. A good bio converts 30-50% of profile viewers, a bad one converts <10%.

Each platform has its own rules. Instagram (150 chars): aesthetic, line breaks for rhythm, accent emoji, 'link in bio' CTA. TikTok (80 chars!): ultra-short, punchy, single line. LinkedIn (220 chars): formal, title + value prop, minimal emoji. Threads (150 chars): conversational, few hashtags.

This tool takes your identity (name, role, keywords, style) → AI builds 4 platform-specific bios simultaneously. Char limits are enforced strictly — no overflow (which truncates as '...'), no underfilling (loses value communication).

'Personal brand' style fits 80% of creators. 'Professional' for founders/business freelancers. 'Quirky' for fun creators wanting to stand out. 'Minimalist' for aesthetic accounts, photography, fashion.

  • ✓1 request → 4 bios (Instagram, TikTok, LinkedIn, Threads)
  • ✓Exact char limits: IG 150, TikTok 80, LinkedIn 220, Threads 150
  • ✓4 styles: Professional, Personal brand, Quirky, Minimalist
  • ✓Live char counter — red if over, green if OK
  • ✓Tabs UI for easy platform switching + per-platform copy
  • ✓Vietnamese-natural, emoji style-matched
  • ✓JSON output, validated parse
  • ✓Rate limit 20 gen/hour/IP

When do you need a bio generator?

Brand new accounts

Building IG/TikTok/LinkedIn from scratch — bios are the first thing to fill. AI keeps identity consistent.

Repositioning

Switching from Beauty Blogger → Beauty + Skincare consultant. Bios must reflect — AI rewrites fast.

Personal brand build-out

Solopreneurs/freelancers want 4 platforms consistent — same name, tagline, emoji, varied length.

Agency/studio brand

Agency account needs formal bio with clear value prop and website CTA. Style 'Professional'.

Side project launch

Side hustle bios need personality but still pro. Style 'Personal brand'.

A/B test bios

Generate 2-3 times with different styles → pick the best after a one-week test of follow conversion.

Under the hood

Backend /api/ai/bio accepts POST {name, role, keywords?, style}. Validates lengths. System prompt asks Claude to output JSON {instagram, tiktok, linkedin, threads} with char limits baked into instructions.

Parser extractBioJson() finds the first '{' and last '}', JSON.parses. Validates 4 string fields. Returns alongside the PLATFORM_LIMITS constant so the client can render the char counter.

Temperature 0.7 — balanced creativity and consistency. Max tokens 800 covers all 4 bios. Average cost ~$0.002/request.

FAQ

Does AI ever exceed the char limit?

Rare. The prompt strongly emphasizes 'STRICTLY follow the char limit — count before responding'. UI counter turns red on overflow — you can re-Generate to get a properly-sized version.

Does LinkedIn use the right formal tone?

Yes. The LinkedIn slot is prompted 'formal'. No frivolous emoji, business language.

CTAs like 'link in bio'?

Yes. 'Personal brand' style usually includes 'link in bio' or '→ website'. 'Professional' includes 'Contact: email'. Varies by style.

Is emoji usage balanced?

Style-dependent. Minimalist: 0. Professional: 0-2. Personal brand: 2-3. Quirky: 4+. Matches the identity you pick.

English bios?

Switch UI to /en. AI still builds the bios, but anchored to an English creator. The tool is most optimized for Vietnamese, though.