Social Media Bio Character Limits for Every Major Platform

Why bio limits matter

A bio is often the first thing a new visitor reads, and the limit is tight enough that every word has to earn its place. Bio limits also differ more between platforms than post limits do: the shortest of the big networks, TikTok, allows 80 characters, while the LinkedIn About section allows 2,600. If you use the same text everywhere it will be cut on some platforms and look thin on others.

The numbers below are the limits that apply as we write, and they are the same values used by the character counter on this page. Platforms change these now and then, so use the figures as a guide and check the profile editor of the platform when exact length matters.

Instagram, TikTok and X

Instagram allows 150 characters in the bio, and the name field is limited to 30 characters. The username is also limited to 30 characters. Because Instagram counts line breaks and emoji as characters, a bio with several short lines uses more of the 150 than the visible text suggests.

TikTok allows only 80 characters in the bio and 24 in the username. X allows 160 characters in the bio, 50 in the display name and 15 in the handle. Between these three, X gives you the most room, TikTok the least, and a bio written for TikTok will fit anywhere.

Threads, Bluesky and Pinterest

Threads uses the Instagram profile and allows 150 characters in the bio. Bluesky is more generous with 256 characters in the description and 64 in the display name, which is room for two short sentences and a link. Pinterest allows a short “About you” text, commonly cited as 160 characters, although some sources report more, so check the field in the editor.

These networks are used differently, so the bio should be too. On Pinterest the bio supports search and should name the topics you pin. On Bluesky it often carries personality, since the community values it. On Threads it usually mirrors Instagram, so one good line can serve both.

LinkedIn and professional profiles

LinkedIn is the outlier. The headline, the line under your name, allows 220 characters. The About section allows 2,600 characters, which is long enough for a real summary. Only about the first 210 characters of the About section show before “see more”, so the opening has to do the work.

Because LinkedIn text is also searched, the headline and the first lines of the About section are worth writing with the terms recruiters and clients would search for. The limit is not hard to reach with a normal summary, which is why a counter is useful: you can see at a glance how close you are before the editor cuts the text.

Facebook and YouTube

Facebook allows a short intro of 101 characters on a personal profile, and Pages have their own short description field. The intro is the visible line next to your photo, so treat it as a headline. For YouTube, the channel description allows up to 1,000 characters and the channel name up to 100. Only the first lines of the description show before the viewer expands it.

If you run a channel and a Page, the same pitch can be written once at the longest length and then cut down for each smaller field. Keeping a master version and a short version saves time when you update your profiles.

Writing a bio that fits

A good bio answers three questions in order: who you are, what you offer and what the visitor should do next. In 80 characters you may only manage the first two, and that is fine. Lead with the most useful fact, not with a joke or a list of titles. Avoid filler such as “passionate about” and use the space for concrete words that could be searched.

Emoji can save space as separators, but they also use characters, and a few of them can look cluttered. Line breaks usually count too, so a four-line bio costs three extra characters. Always check the final text in the counter, and then open your profile on a phone to see how it wraps. A bio that fits the limit but breaks in an odd place looks careless.

A bio checklist

Write one master bio of about 150 characters. Make a short version of 80 for TikTok. Make a longer version for Bluesky, LinkedIn and YouTube. Keep the same name, tone and keywords across profiles so people recognise you. Review the bios every few months, because limits and features change, and a bio that was right last year may no longer fit. It also helps to keep a note of the date you last checked the limits, so you know how fresh your information is.

Use the limit dropdown or the quick buttons above the text box to check each version against the real limit. Switching between Instagram bio, TikTok bio and the others takes one click, and the bar shows how many characters remain, so you can finish a set of profiles in a few minutes. Copy each final version into the platform straight from the text box, and download the master text as a file if you want to keep it.