Formatting toolbar and preview for LinkedIn posts
Adds bold, italic, lists and a 'see more' preview to LinkedIn's post box, and warns when styling hurts screen readers.
- Browser extension
- Writing & Content
- Easy build
- 2-4 weekends
- Researched by ProjPilot
The problem
LinkedIn's post editor has no bold or italic, so people paste text from web formatters that swap letters for Unicode lookalikes. Those characters can be misread or skipped by screen readers, and writers can't see where the 'see more' cut falls before posting. Tools that show the preview charge for it or bundle it with scheduling and analytics.
For: Founders and consultants · Job seekers · Marketers and ghostwriters
Why now
LinkedIn says it has more than 1 billion members. The Unicode Standard says mathematical alphanumeric symbols, the characters behind 'bold' LinkedIn text, should not be used to style ordinary text, and Massachusetts' accessibility guidance warns screen readers may skip them.
Demand signals
Monthly Google searches in the US, pulled 2026-09-24. These are the words people with this problem actually type.
What exists already
- AuthoredUp ↗Full composer upgrade with the 'see more' preview, but $19.95/month after a trial.
- Taplio ↗AI writing, scheduling and analytics from $39/month; its Chrome add-on focuses on stats rather than formatting.
- Post Formatter ↗Free formatting toolbar inside LinkedIn; the live preview is Pro ($29/year).
- Beautify Post ↗Free open-source bold/italic button for posts only; no preview, not updated since April 2024.
MVP scope
- Toolbar inside LinkedIn's composer: bold, italic, bullets, numbered lists
- Free preview of the mobile and desktop 'see more' cut-off
- Screen-reader warning when styled Unicode text is used heavily
- Accessible mode that uses line breaks and bullets instead
- Saved snippets and opening-line templates
- Drafts stored locally in the browser
How it could make money
- Free formatter with the live preview
- Pro $3/month for a drafts library, templates and post history
Suggested stack
- Chrome MV3
- TypeScript
- Unicode Mathematical Alphanumeric Symbols mapping
Sources
- About LinkedIn (accessed 2026-09-24)
- The Unicode Standard, Version 17.0, Chapter 22: Symbols (accessed 2026-09-24)
- Social Media Post Accessibility (Mass.gov) (accessed 2026-09-24)
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