Last verified on . Platforms change limits without notice, so check the linked source before you rely on a number.
X (Twitter) character limits
X character counter| Field | Limit | Type | Notes | Source |
|---|---|---|---|---|
| Post | 280 characters | Enforced | Every URL counts as 23 characters; most emoji count as 2. | X Developer Platform — Counting characters |
| Longer post (Premium tiers) | 25,000 characters | Enforced | Available on Basic, Premium and Premium+. Only the first 280 characters show in the timeline. | X Help Center — About X Premium |
| Bio | 160 characters | Enforced | — | X Developer Platform — Counting characters |
Instagram character limits
Instagram character counter| Field | Limit | Type | Notes | Source |
|---|---|---|---|---|
| Caption | 2,200 characters | Enforced | Roughly the first 125 characters show before “more”. | Instagram Help Center |
| Hashtags per post or reel | 5 hashtags | Enforced | Reduced from 30 on 18 December 2025. | Instagram @creators announcement, 18 December 2025 |
| Bio | 150 characters | Enforced | — | Instagram Help Center |
LinkedIn character limits
LinkedIn character counter| Field | Limit | Type | Notes | Source |
|---|---|---|---|---|
| Post | 3,000 characters | Enforced | About the first 140 characters show before “see more” on mobile. | LinkedIn Help |
| Headline | 220 characters | Enforced | — | LinkedIn Help |
| About section | 2,600 characters | Enforced | — | LinkedIn Help |
| Comment | 1,250 characters | Enforced | — | LinkedIn Help |
| Article body | ~110,000 characters | Approximate | Published figures range from 110,000 to 125,000. | LinkedIn Help |
SMS character limits
Character counter| Field | Limit | Type | Notes | Source |
|---|---|---|---|---|
| Single message (GSM-7) | 160 characters | Enforced | 153 per part when a message is split. | 3GPP TS 23.038 (GSM 03.38) — SMS alphabets |
| Single message with emoji or non-Latin text (UCS-2) | 70 characters | Enforced | 67 per part when a message is split. | 3GPP TS 23.038 (GSM 03.38) — SMS alphabets |
How to read this table
- Enforced limits are applied by the platform: you cannot publish past them.
- Approximate limits are figures that vary between sources or by device, so leave a margin.
- Spaces, punctuation and line breaks count toward every limit on this page.
- Emoji usually count as two characters or more. How this site counts them is explained in the methodology.
Frequently asked questions
What is the character limit for a post on X (Twitter)?
A standard post on X is limited to 280 characters. Paid Premium tiers can publish longer posts of up to 25,000 characters. Every link counts as 23 characters regardless of its real length.
How many hashtags can I use on Instagram?
Instagram allows up to 5 hashtags per post or reel. The limit was 30 until 18 December 2025. Captions can be up to 2,200 characters.
How long can a LinkedIn post be?
A LinkedIn post can be up to 3,000 characters. Only about the first 140 characters show before the “see more” link on mobile, so put the key point first.
How many characters fit in one SMS?
A single SMS holds 160 characters in the standard GSM-7 alphabet, or 70 if it contains emoji or non-Latin characters. Longer messages are split into parts of 153 or 67 characters.
Do spaces count toward character limits?
Yes. On X, Instagram, LinkedIn and SMS, spaces, punctuation and line breaks all count toward the limit.
Is a limit here out of date? Let us know and we will re-check it.