How do you bold accented letters on LinkedIn?

Why LinkedIn breaks accented words

LinkedIn has no bold. There is no button and there never was: the post composer takes plain text only.

What everyone calls «LinkedIn bold» is a substitution trick. Each letter is swapped for a different character that Unicode draws with a heavy stroke, from a block called Mathematical Alphanumeric Symbols. It is not the letter A in bold — it is a separate character, designed for maths, that happens to look the part.

That block covers A-Z, a-z and 0-9. Nothing else. No á, é, í, ó, ú, ü or ñ, because a formula never needs them.

So every tool on the market leaves accented letters untouched and hands you broken words. English speakers rarely notice. In Spanish, French, Portuguese or Polish it shows up immediately.

How we fix it

Unicode does let you stack an accent mark on any letter. They are called combining diacritics: characters with no width of their own that render on top of the previous one.

So we take the bold base letter and stack its accent on it. The whole word stays bold, with no gaps and no jumps in weight.

The obvious worry is whether it survives publishing. Platforms normalise text before storing it, and normalisation merges a letter and its accent when a single character already combines them. We checked: Unicode defines no «mathematical bold letter with accent», so there is nothing to merge into and the pair stays intact.

What it costs you in characters

A LinkedIn post allows 3,000 characters, and these characters are not free.

Bold letters live outside Unicode's basic range, so each one costs twice a normal letter. With an accent, the mark adds one more.

The word «Diseño» takes 6 characters as plain text, 11 with the market's bold and 13 with ours. Bold a whole post and half your budget is gone. Use it in three or four places, not everywhere.

Where it works, and where it does not

It works in posts, comments, your profile headline and the About section. You copy and paste it like normal text because, technically, that is what it is.

What to know first: screen readers handle it badly. To VoiceOver or NVDA these are not alphabet letters, so they get spelled out one by one or skipped entirely. A whole sentence in bold can become unreadable for a blind reader.

Search engines also treat it as unusual characters, so it will not help anyone find you.

The honest recommendation: use it on three or four words that genuinely matter, never on full paragraphs or your entire headline.

Frequently asked questions

Why do other tools break accents?

Because the Unicode block they use only holds A-Z, a-z and 0-9. No accented vowels, no ñ, so they leave them untransformed. Most were built for the English-speaking market, where the problem is invisible.

Does it look the same on mobile and desktop?

Usually, though a stacked accent can sit slightly off depending on the system font. If the detail matters to you, post a test and check it on your phone first.

Can LinkedIn penalise me for using bold?

No rule forbids it and there is no evidence of a penalty. The real cost is accessibility: overuse it and some people will not be able to read you.

Does it count toward the 3,000 character limit?

Yes, and it counts double. Each bold letter eats two characters, three with an accent. The counter on this page shows the real total.

Do I need an account?

No. The tool runs entirely in your browser, never sends your text to a server, and has no usage limit.

Can I undo the formatting?

Yes. Paste formatted text and use «Remove formatting» to get normal letters back, with accents recomposed.