LINE Message Character Limits | Messages, Notes & Profile Guide
LINE is the dominant messaging app in Japan and several other Asian markets, with over 97 million monthly active users in Japan alone. Despite its widespread daily use, few people know the exact character limits for each feature. This article provides a comprehensive overview of LINE's character limits across all major features, along with professional tips for maximizing your communication within those constraints.
Surprising Facts About LINE
LINE's chat message limit is 10,000 characters, but this wasn't always the case. The limit was reportedly lower at launch and has been gradually expanded over time. Another lesser-known fact: LINE limits emoji to a maximum of 20 per message. Heavy emoji users may hit this cap before reaching the character limit.
LINE also offers a "message unsend" feature, but it only works within 24 hours of sending. This serves as a safety net if you accidentally send a message with errors or excessive length.
LINE Character Limits at a Glance
| Feature | Character Limit | Notes |
|---|---|---|
| Chat Messages | 10,000 characters | Equivalent to roughly 12–16 pages of a Japanese book; effectively unlimited for practical purposes |
| Group Names | 50 characters | Designed to fit in 1–2 lines on a smartphone screen |
| Notes | 10,000 characters | Same as chat; ideal for meeting notes or travel plans |
| Profile Name | 20 characters | Ensures names display without truncation in chat lists |
| Status Message | 500 characters | More generous than X/Twitter's former 160-character bio limit |
| LINE VOOM Posts | 10,000 characters | Supports blog-style long-form content |
LINE Official Account Limits
| Feature | Character Limit | Notes |
|---|---|---|
| Text Message | 500 characters | Up to 3 bubbles per broadcast (1,500 total) |
| Rich Message | Image + link only | Text is embedded within the image |
| Greeting Message | 500 characters | Auto-sent when a user adds the account as a friend |
| Auto-Reply Message | 500 characters | Same limit applies to keyword-triggered responses |
Why Official Accounts Are Limited to 500 Characters
The 500-character limit for LINE Official Accounts reflects a deliberate UX design choice. Long messages from businesses tend to feel like spam, reducing open and read-through rates. At roughly one minute of reading time, 500 characters is about the maximum that fits on a smartphone screen without scrolling. This constraint forces businesses to focus on their core message, ultimately improving the user experience.
Common Mistakes When Ignoring Character Limits
- Official account messages getting cut off: Writing beyond 500 characters without checking, then scrambling to trim the text at send time, often resulting in an incoherent message.
- Profile names truncated with "...": Attempting to set a name longer than 20 characters, then awkwardly abbreviating it into something unrecognizable.
- Long messages getting ignored: Sending a 10,000-character wall of text that fills the recipient's entire screen, killing any motivation to read it.
- Important info lost in chat: Posting critical announcements in the chat stream instead of using Notes (which supports 10,000 characters and can be pinned).
Professional LINE Communication Techniques
- The "3-line rule": Keep each message to 3 lines or fewer. For longer content, split into multiple messages. This aligns with the amount of information short-term memory can process at once.
- The "first 14 characters" principle: LINE notification previews show roughly 14–20 characters. Place your most important information within this range to dramatically improve open rates.
- Bubble splitting for official accounts: Instead of one 500-character bubble, use three 150–200 character bubbles. This creates a conversational rhythm that improves read-through rates.
- Strategic emoji placement: Placing emoji at the beginning and end of messages increases visibility in chat lists. Limit to 2–3 per message to avoid looking unprofessional.
Effective Use of Line Breaks
Strategic line breaks dramatically improve readability on LINE. Insert a blank line every 3–4 lines to create visual breathing room on small smartphone screens. For business communications, use bullet points to organize information so recipients can quickly find what they need.
Conclusion
LINE's character limits vary significantly by feature. The 500-character limit for official accounts is particularly tight, so always verify your character count with Character Counter before sending. By applying the "first 14 characters" principle and bubble-splitting technique, you can create messages that resonate with readers even within strict limits.