Every free LinkedIn text formatter does the same core job: it swaps your letters for Unicode look-alike characters that stay bold or italic when you paste them into LinkedIn. So the real differences are the extras โ list tools, a feed preview, a browser extension, and whether the formatter is the front door to a paid platform. Here are six free options, checked against their own pages in September 2026.
LinkedIn's post box has no bold or italic button, and typing **asterisks** just posts the asterisks. Any tool on this list fixes that. Which one fits depends on how you write: in a browser tab, inside a scheduling tool, or straight into LinkedIn with an extension.
The quick comparison
| Tool | Free, no account | Styles and lists | Feed preview | Browser extension | Paid platform behind it |
|---|---|---|---|---|---|
| BoldlyType | Yes | 10 Unicode styles, plus โข and โฃ bullet buttons | Estimates the "see more" cutoff on desktop and mobile | No | None |
| Typefully | Yes | Bold, italic, underline, strikethrough, script, gothic, monospace, double-struck | Post preview | Not mentioned | Writing and scheduling |
| Taplio | Yes | 23 options, including bullet, numbered and checklist lists | Shows where the fold falls on each device | Not mentioned | Scheduling, analytics, AI writing |
| Typegrow | Yes | Bold, italic, underline, strikethrough, script, double-struck, fullwidth, case changes, bullet, numbered and checklist lists | Preview with the "โฆmore" cutoff | Not mentioned | Paid plans above a free plan |
| AuthoredUp | Yes | Bold, italic, underline, strikethrough, bullets, numbered lists, emoji, "staircase" line sorting | Preview, including an uploaded photo | Yes, Chrome | Editor, calendar and analytics (14-day trial) |
| Supergrow | Yes | Bold, italic, bold italic, underline, strikethrough, monospace, script, bold script, bullets, numbered lists | Live preview | Not mentioned | AI writing and scheduling (7-day trial) |
"Not mentioned" means the tool's formatter page doesn't mention an extension, not that one can't exist. YayText is also popular for LinkedIn, but its LinkedIn page didn't load when we checked, so it isn't in the table.
They all use the same Unicode trick
None of these tools changes LinkedIn's font. Each one replaces a letter like "a" with a separate character from Unicode's Mathematical Alphanumeric Symbols block, such as "๐ฎ", that already looks bold. LinkedIn displays it because, as far as LinkedIn can tell, you typed an ordinary character.
That has two consequences worth knowing before you choose:
- The bold looks the same everywhere. A bold "B" from Taplio and a bold "B" from BoldlyType are usually the identical character, so no tool makes "better" bold.
- The limits are shared too. Styled letters aren't matched by LinkedIn search, many screen readers read them one letter at a time, and each styled letter can count as two characters against the 3,000-character post limit. Supergrow and Typefully both warn about the search and screen-reader limits on their own pages, and all three apply to every tool here.
So pick on the workflow around the formatter, not the letters themselves.
Pick by how you write
You write straight into LinkedIn. AuthoredUp is the only tool here whose page confirms a Chrome extension, which saves copying text between tabs. The trade-off is that the extension belongs to a paid platform, with a 14-day trial.
You want lists and checklists built in. Taplio (23 options) and Typegrow both include bullet, numbered and checklist formatting next to the text styles. BoldlyType has one-tap โข and โฃ bullet buttons but no numbered or checklist lists.
You care most about the "see more" cutoff. LinkedIn cuts a post after roughly three lines. Taplio shows where the fold falls on each device, and BoldlyType estimates the cutoff for both desktop and mobile as you type. The guide to structuring a LinkedIn post covers what to put above that line.
You don't want a platform at all. Five of the six formatters are free doorways into paid scheduling or writing products. That's a fair business model, and the formatters are free without an account. But if you only want to bold a line and leave, BoldlyType's formatter has no platform to upgrade into and no trial to start.