LinkedIn strips out HTML, so there’s no native way to bold a line in a post. Sourcers get around it with Unicode “math alphabet” characters that look like styled letters but are really just different code points. This formatter does that conversion for you: select text, hit Bold or Italic, and you get characters LinkedIn renders verbatim on web, mobile, and the iOS/Android apps. There’s also strikethrough, underline, monospace, script, and Fraktur under More, plus bullet and numbered lists.
Type Shipping a new feature :fire: and the output converts the emoticon to an emoji. Bold the first three words and the output becomes 𝗦𝗵𝗶𝗽𝗽𝗶𝗻𝗴 𝗮 𝗻𝗲𝘄 feature 🔥 — paste-ready, no extension, no signup. The picker below the input holds 200 LinkedIn-safe emojis with a live filter, and a counter tracks the 3,000-character post limit as you go.
One honest catch this tool actually warns you about: those styled characters are not real letters. Screen readers read them out one Unicode name at a time, and LinkedIn won’t index a hashtag or a hook written in them — so the coach flags it when your first 200 characters or your #hashtags are styled. Keep emphasis under about 20% of the post, leave the hook and hashtags plain, and use it to punctuate, not to decorate.