Why do short links help with SMS length limits?
A short text (SMS) generally fits within about 80 bytes, and a long text (LMS) generally fits within about 2,000 bytes. Limits can vary by carrier and sending service, so shortening the destination URL with lsu.kr instead of the original leaves more room for your actual message.
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How do short (SMS) and long (LMS) texts differ in length?
A short text generally fits within about 80 bytes. Go over that and it is often converted automatically to a long text (LMS) or split into multiple messages, which can raise the cost.
A long text generally fits within about 2,000 bytes. These figures can vary by sending service and carrier, so check with your provider for exact limits.
- Short (SMS): generally about 80 bytes
- Long (LMS): generally about 2,000 bytes
- Letters and digits are often counted as 1 byte each; non-Latin characters can take 2–3 bytes each
Why is a long original URL a problem?
A shop's homepage, a map link, or a booking page URL is often long and complex, and it can take up a large share of your character budget by itself. Addresses with several parameters attached eat into the space you have for your actual message even more.
Shortening it with lsu.kr produces a short, consistent length like name.lsu.kr/Ab3dE9, leaving room for a greeting or business hours. See sending short links by SMS for more.
Do emoji or special characters change how length is counted?
Yes — including emoji or certain special characters can switch the message to a different encoding, which can shrink how much text actually fits. Handling varies by sending service, so shorter messages are generally the safer choice.
Frequently asked questions
Does using a short link reduce the sending cost?
A shorter URL reduces the total character count, making it more likely to fit within the short (SMS) range, which can be cheaper than a long (LMS) message. Check exact pricing with your sending service.
Can I know exactly how many bytes I can send?
Limits vary by sending service and carrier, so an exact number is hard to guarantee. Use roughly 80 bytes for short and 2,000 bytes for long as a rule of thumb, and confirm with a preview before you actually send.
Does it automatically switch to a long message past a certain length?
Most sending services automatically convert to a long message (LMS) or split into multiple texts once the byte limit is exceeded, but behavior varies by service.
Does KakaoTalk have a similar length limit?
KakaoTalk works differently from text messages and has no separate byte limit, so you can send longer content, but a short link still keeps the message tidier. See sharing short links on KakaoTalk.
Which is better to send, a short or a long message?
A short (SMS) message is usually cheaper if your text fits. Since shortening the URL with lsu.kr makes it more likely to fit within the short range, it is worth tightening the wording and trying a short message first.