Social Media Bio Character Limits 2026: Instagram, TikTok, X, LinkedIn, YouTube and More

Last verified: October 2026. Next review: January 2027.

Social media bio character limits in 2026 run from 80 characters on TikTok to 2,600 on LinkedIn's About section. Instagram and Threads allow 150, X allows 160, Discord 190, the LinkedIn headline 220, Bluesky 256, Pinterest 500 and a YouTube channel description 1,000. Every one of those counts spaces, and most count emoji and line breaks too.

This reference is for creators, marketers and social media managers who write bios for more than one platform. It gives each limit with a confidence rating, shows how much of a bio appears before it is cut off, explains why a counter and an app can disagree, and walks through one bio written to fit every limit. Figures were last verified in October 2026, and we say plainly where sources disagree. Trndinn's free Bio Generator uses the same limits.

Quick answer: bio character limits by platform

Platform	Bio field	Limit	What shows before the cut	Confidence
Instagram	Bio	150	All 150	High
TikTok	Bio	80	All 80	High, with one outlier
X	Bio	160	All 160	High
LinkedIn	Headline	220	Roughly the first 60 to 70 characters in tight spaces such as comments	High for the limit, medium for the display
LinkedIn	About	2,600	Roughly 200 on mobile and 300 on desktop	High
Facebook	Personal profile intro	101	All 101	Medium
Facebook	Page intro	255	Not confirmed	Medium
YouTube	Channel description	1,000	About the first 100 characters on many screens	Medium
Threads	Bio	150	All 150	High
Bluesky	Bio	256 graphemes	All	High
Mastodon	Bio	500 by default, set by each server	All	Medium
Pinterest	About	500	About the first 140 in the default view	Medium
Discord	About Me	190	All 190	High
GitHub	Bio	160	All 160	High

How to read the confidence column. High means the same figure appears in every reference we checked. Medium means figures differ between sources, or the limit depends on account type or server, or we could not confirm what displays. The section on where sources disagree has the details.

Name and username limits

A bio is only one field. Names and usernames have their own ceilings, and on several platforms the name field is searchable, so a keyword there can do more work than a keyword in the bio.

Platform	Name or display name	Username or handle
Instagram	30	30
TikTok	30 (nickname)	24
X	50	15
Bluesky	64	Set by domain or handle rules
Mastodon	30	Set by each server

Treat the name figures as the ones most likely to change, and check the edit screen before you rely on them.

What is the Instagram bio character limit?

An Instagram bio can be up to 150 characters. The count includes letters, spaces, punctuation, emoji and line breaks, so a bio built from three short lines spends two characters on the breaks before a single word is written.

The name field above the bio is a separate 30 character field, and it is searchable, which makes it the better home for a keyword such as your role or niche. Your username is also capped at 30 characters and allows letters, numbers, periods and underscores. The profile shows one visible link, and any others sit behind a tap, so do not spend bio characters on a URL.

All 150 characters display on the profile, so nothing is hidden behind a fold. That makes every word count, and it makes the first few words matter less than they do on LinkedIn. The line that earns the follow is usually the one that says who you help and what changes for them.

What is the TikTok bio character limit?

A TikTok bio is limited to 80 characters, the tightest of any major platform. That figure includes letters, spaces, symbols and emoji. Your username allows 24 characters and your display name, which TikTok calls a nickname, allows 30.

A few references report that some accounts have seen a longer bio field, with 160 mentioned. We could not confirm that from TikTok's own documentation, and 80 remains the widely enforced default, so plan for 80 and treat anything longer as a bonus you may not have.

Emoji deserve special care here. Several references say each emoji can count as two or three characters on TikTok, depending on how complex it is. If you sit at exactly 80 and add a flag or a skin tone emoji, you may be over without realizing it. Leave a margin of at least five characters when you use emoji. With so little room, a TikTok bio is a tagline, not a summary, so state one idea and save the detail for the link.

What is the X bio character limit?

An X bio allows 160 characters. Your display name allows 50 characters and your handle allows 15, and all three limits are documented in X's help center according to the 2026 references we checked.

The whole 160 characters display on the profile. The common structure is a role, a topic and a human note, separated by dots or line breaks, for example a job, what you post about, and one personal detail. Because the handle is capped at 15 characters, many people keep it short and let the display name carry the longer, more descriptive text.

What are the LinkedIn headline and About limits?

The LinkedIn headline allows 220 characters, and the About section allows 2,600. These are two different fields with two different jobs, and most guides blur them.

The headline appears under your name everywhere on the platform: your profile, search results, comments and connection requests. In tight spaces such as a comment, only the first 60 to 70 characters show, so write the first part to carry the whole promise and use the remaining characters for detail and keywords.

The About section allows 2,600 characters including spaces and line breaks. It collapses behind a see more link, and the visible portion varies by device. References put it at roughly 200 characters on mobile and roughly 300 on desktop, and the table inside our Bio Generator uses about 210. The practical rule is the same either way: the first two lines must work on their own.

For LinkedIn Pages, which are company profiles, the tagline allows 120 characters and the overview allows 2,000 according to the references we checked.

Some older guides still say the About section allows 2,000 characters. The 2026 references we reviewed agree on 2,600. For a full walkthrough of what to write inside those limits, see our guide on how to write a LinkedIn bio.

What are the Facebook bio limits?

A Facebook personal profile intro allows 101 characters. That is the short blurb shown near the top of your profile, and it is the field most people mean when they ask about a Facebook bio.

Facebook Pages have their own intro field, which references put at 255 characters. Sources are less consistent here, and Pages also carry longer About text elsewhere on the page, so check the edit screen for the field you are filling in. Because the personal intro is so short, treat it like a TikTok bio: one clear line, no filler.

What is the YouTube channel description limit?

A YouTube channel description allows 1,000 characters. Only the opening shows before a visitor has to expand it, and the table inside our Bio Generator puts that at about the first 100 characters, which is a useful planning number even though exact cutoffs vary by screen.

Front load the value proposition: who the channel is for and what they get. Put links, schedules and contact details after it. Remember that this field is separate from individual video descriptions, which have much larger limits and their own rules.

What are the Threads, Bluesky and Mastodon limits?

Threads allows 150 characters in the bio. That matches Instagram, which makes it easy to reuse the same line.

Bluesky allows 256 characters in the bio and 64 in the display name, and it counts graphemes, meaning user perceived characters. In practice, an emoji counts as one on Bluesky, which is the way a person would count it. That makes it the friendliest platform for emoji heavy bios.

Mastodon allows 500 characters in the bio by default, but each server sets its own rules, so a server can raise or lower the number. Check the server you use before you assume.

What are the Pinterest, Discord and GitHub limits?

Pinterest allows 500 characters in the About section, though only about the first 140 characters show in the default profile view, so the most important keywords need to come first. Some older guides list 160 for Pinterest, which was an earlier limit.

Discord's About Me allows 190 characters. Every letter, space and punctuation mark counts, and Discord's own support community discusses the 190 ceiling directly.

A GitHub bio allows 160 characters, and the whole bio displays. The useful pattern for developers is stack and focus rather than adjectives, for example the languages you work in and what you are building.

We cover the platforms above because we can confirm their limits. We add others, such as Snapchat, Reddit, Twitch and Telegram, only once we have verified them, and we would rather leave a platform out than guess.

Where sources disagree

Reference pages for character limits often contradict each other. These are the disagreements we found, and what we use.

Item	Figures reported	What we use	Why
LinkedIn About	2,000 and 2,600	2,600	Every 2026 reference we checked says 2,600, and older guides carry 2,000
TikTok bio	80, and 160 for some accounts	80	Widely enforced default, and the longer figure is unconfirmed
Pinterest About	160 and 500	500	Current references say 500, and 160 appears in older guides
Facebook Page intro	101 and 255	101 for personal intros, 255 for Pages	The two figures describe different fields
LinkedIn About, visible before see more	About 200, 210 and 300	Roughly 200 to 300	Depends on device and line breaks
Instagram name field	30	30	References agree, though this figure has changed in the past

If you spot a number in your own app that differs from the table, believe the app and tell us. Our contact page is linked at the end.

How are characters counted, and why do counters disagree?

A bio counter and the app can show different numbers for the same text. The reason is that "a character" means different things to different systems. We tested this by counting a set of sample strings four ways in Python 3, using its regex module for grapheme matching, in October 2026.

Sample	Code points	UTF 16 units	Graphemes	UTF 8 bytes
Plain text sentence	64	64	64	64
One rocket emoji	1	2	1	4
Thumbs up with skin tone	2	4	1	8
Flag emoji (India)	2	4	1	8
Family emoji (joined)	5	8	1	18
Accent, precomposed e	1	1	1	2
Accent, e plus combining mark	2	2	1	3
Styled bold word (founder)	7	14	7	28
Plain word (founder)	7	7	7	7
Line break, LF	3	3	3	3
Line break, CRLF	4	4	3	4

Here is what the results mean in practice.

Plain text is safe. For a normal English sentence, every method agrees. Differences only appear when a bio contains emoji, accents or styled letters.

Emoji are where counts split. A single rocket emoji is one code point and one grapheme, but two UTF 16 units. A joined family emoji is one grapheme but eight UTF 16 units. A counter built on JavaScript's string length reads the second number, while a system that counts graphemes, as Bluesky does, reads the first. The same bio can sit under one limit and over another.

Styled letters cost double. The bold looking word in the table is seven characters to a person and fourteen UTF 16 units to many counters. A tagline written in styled Unicode "fonts" can therefore use up to twice its apparent length, and it can also read poorly for people using screen readers.

Line breaks are not free. Instagram counts them, and a Windows style line break can count as two characters where a Mac or phone counts one.

We tested counting methods, not individual platforms, so we cannot say exactly which method each app uses. References report that Instagram counts emoji and line breaks, that TikTok counts some emoji as more than one character, and that Bluesky counts graphemes. The reliable rule is to leave a margin. Stay at least five characters under a limit when your bio contains emoji, and ten if it contains flags, skin tones or joined emoji.

How much of your bio actually shows?

The limit is how much you can write. The display is how much anyone reads. They are often very different.

Platform and field	Limit	Roughly visible before the cut
Instagram bio	150	All 150
TikTok bio	80	All 80
X bio	160	All 160
LinkedIn headline	220	The first 60 to 70 characters in comments and search suggestions
LinkedIn About	2,600	200 to 300 characters
YouTube channel description	1,000	About the first 100 characters
Pinterest About	500	About the first 140 characters

The pattern is clear. Short fields show everything, so every word competes. Long fields hide most of their content, so the opening carries the load. Write the first line of every long bio as if it were the only line anyone will read, because for most visitors it will be.

Write once, fit everywhere: the nested bio method

Writing a separate bio for every platform is slow and makes your positioning drift. A faster approach is to write one idea at the shortest length, then add layers as the limits grow. We call it the nested bio, and each version contains the one before it.

Step 1: write the 80 character core. One sentence that says who you help and what changes. If it does not fit in 80, the idea is not yet sharp enough.

Step 2: add proof. A number, a result or a credential, and the bio grows to about 150.

Step 3: add a human line. A hobby or opinion, as it grows toward 160 and beyond.

Step 4: add an invitation. One light next step, in the longer versions.

Step 5: add keywords last, in the fields that are long enough to hold them.

Here is the method applied to one fictional founder coach, with every length counted rather than estimated. The names and numbers are placeholders, so use your own.

Where it fits	Limit	Characters used	Spare
TikTok bio	80	77	3
Instagram and Threads bio	150	146	4
X bio	160	149	11
LinkedIn headline	220	171	49
Bluesky bio	256	237	19

TikTok, 77 characters

SaaS founder coach. Helping you grow on LinkedIn without the corporate voice.

Instagram and Threads, 146 characters

SaaS founder coach. I help B2B founders grow on LinkedIn without sounding corporate. 40+ founders, 15 minutes a day. Comment "hooks" for my guide.

X, 149 characters

SaaS founder coach. Helping B2B founders grow on LinkedIn without sounding corporate. 40+ founders coached, 15 minutes a day. Free hooks guide below.

LinkedIn headline, 171 characters

Helping B2B SaaS founders get their first 10,000 LinkedIn followers without sounding corporate | 40+ founders coached | A repeatable system that fits into 15 minutes a day

Bluesky, 237 characters

Helping B2B SaaS founders get their first 10,000 LinkedIn followers without sounding corporate. 40+ founders coached with one repeatable system that fits into 15 minutes a day. Also unreasonably obsessed with cold brew and terrible puns.

Notice what stayed constant: the audience, the promise and the proof. Only the amount of supporting detail changed. That consistency is what makes a person recognize you from one platform to the next, which is worth more than any single clever line.

Nine mistakes that break a bio

1. Trusting a word processor's count. A document may count line breaks, emoji and styled letters differently from the app. Test in the actual editing screen before you publish.

2. Using the full limit with emoji in it. Leave a margin, as explained above.

3. Pasting styled Unicode letters. They can double your character use and read poorly for people using assistive technology.

4. Believing the About section is 2,000 characters. Older guides still say so. Current references agree on 2,600.

5. Putting the point after the cut. On long fields, anything past the first two lines is read by a minority of visitors.

6. Pasting one bio everywhere. What fits LinkedIn's 2,600 gets cut on TikTok's 80. Use the nested method instead.

7. Spending characters on a URL. Most platforms give the link its own field, so keep it out of the bio text.

8. Ignoring the name field. On Instagram and several other platforms the name is searchable, so a keyword there is worth more than a fancy font.

9. Never rechecking. Limits change. Review your bios when a platform announces profile updates, and at least once a quarter.

Do bio limits matter for search and reach?

They matter indirectly, and it is worth being precise about how. References report that Instagram's name field is searchable and that LinkedIn indexes the About section in its own search, so the words you place in those fields affect whether people find you.

On LinkedIn there is a second effect. Analysts who studied the platform's 2026 ranking changes say the ranking model reads your headline, About section and experience and compares them with what you post, which makes a clear, specific profile a signal about what you are an expert in. Our breakdown of why LinkedIn reach is dropping in 2026 covers what changed. LinkedIn has not published a formula for bios, so treat this as an informed reading and not a guarantee.

Fit every limit in one run with the free Bio Generator

Counting characters by hand across six platforms is the kind of job a tool should do. Trndinn's free Bio Generator writes bios for LinkedIn, Instagram, X, TikTok, GitHub and YouTube in one run, with a general option as well. It returns three variations per platform, each fitted to that platform's limit: 150 for Instagram, 80 for TikTok, 160 for X and GitHub, 1,000 for YouTube and 2,600 for LinkedIn. It needs no signup, adds no watermark and has no daily limit.

You choose a tone, switch emoji on or off, pick a bio length from short to full, and select up to three focus areas such as credibility, skills or mission. Three practical notes:

The LinkedIn target is the About section. The generator's LinkedIn limit is 2,600, which is the About field. For a headline, choose the shortest length and check the result against the 220 character limit before you paste it.

Use specifics. Give it your role, one result and who reads your bio. Vague inputs make vague bios in any generator.

Read the output against the margin rule. If a variation includes emoji and sits right at the limit, trim a few characters before you publish.

If you are comparing bio tools, see how we compare with Pallyy, which also shows live character counts, or browse the full comparison hub.

Related free tools for profile setup

A bio is half of a profile. These free tools cover the rest, and all run in the browser with no signup.

Image Resizer. Resize a profile photo or banner to exact pixel dimensions, with presets for LinkedIn, Instagram, Twitter, YouTube and Facebook.

Profile Picture Creator. Build a quick avatar from an emoji on a colored background for a side account or a placeholder.

Background Remover. Clean up a headshot with a plain background.

The whole set lives in the free image tools hub and the wider tools directory.

A bio is a one time job that pays off on every profile visit. What brings those visits is posting consistently, and that is a workflow problem more than a writing problem. It is the reason we built Trndinn as a LinkedIn Operating System: discovery, creation, scheduling and analysis in one workspace, with Brand Voice keeping drafts sounding like you. You can look at the features or start free whenever you are ready.

How we verify and when we update

Method. We cross check each figure across multiple independent 2026 references, compare it with the limits table inside our own Bio Generator, and mark a confidence level. Where sources conflict, we list the conflict instead of choosing silently. The counting results come from a test we ran in Python 3 in October 2026.

Limits of this guide. In app counters are the final authority. Platforms change limits without notice, and some limits vary by account type or server. If your app shows a different number, trust it.

Schedule. Platform limits are checked every quarter. This guide was last verified in October 2026 and is next due in January 2027.

Date	Change
October 2026	First publication covering 14 bio fields across 12 platforms, with the counting test and nested bio example

Spotted a number that has changed? Tell us through our contact page and we will check and update it.