String Byte Calculator
Calculate byte sizes for various encodings (UTF-8, UTF-16, EUC-KR). Also check SMS, social media, and SEO character limits.
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📊 Byte Size by Encoding
Web standard, 1-4 bytes
JavaScript internal, 2-4 bytes
Korean legacy, 1-2 bytes
English only, 1 byte
📝 Detailed Statistics
💡 SMS character counts may vary by carrier and device. EUC-KR byte size is estimated.
📖 How to Use
- Enter or paste the text you want to analyze
- Character count, word count, and line breaks are shown automatically
- Check byte sizes for each encoding
- Use the SMS tab to see message segmentation
- Use the Social Media tab for Twitter/Instagram limits
- Use the SEO tab to optimize meta tags
✨ Features
- ✓UTF-8, UTF-16, EUC-KR, ASCII byte size calculation
- ✓Include/exclude spaces option
- ✓Character, word, and line break count
- ✓SMS/LMS/MMS message type detection
- ✓Twitter (280), Instagram (2200) character check
- ✓SEO meta title (60), meta description (160) optimization
- ✓Korean/English auto-detection
- ✓Real-time calculation
📐 Formula
UTF-8: English 1 byte, Korean 3 bytes
UTF-16: Most chars 2 bytes, some 4 bytes
EUC-KR: English 1 byte, Korean 2 bytes💡 How It Works
- •UTF-8 is the most widely used encoding on the web. English uses 1 byte, Asian characters typically use 3 bytes.
- •UTF-16 is used internally by JavaScript and Java. Most characters use 2 bytes.
- •EUC-KR is a legacy encoding for Korean systems. English uses 1 byte, Korean uses 2 bytes.
- •SMS limits are 70 characters for Korean and 160 for English. Exceeding this converts to LMS.
- •Twitter has a 280 character limit, Instagram captions allow 2,200 characters, and bio is limited to 150.
- •Google search results display approximately 60 characters for meta title and 160 for meta description.
❓ FAQ
Q. Why do Korean characters have different byte sizes in different encodings?
A. Each encoding is designed differently. UTF-8 uses variable length (3 bytes for Korean), while UTF-16 typically uses 2 bytes.
Q. What's the difference between SMS and LMS?
A. SMS is limited to 70 Korean characters (160 English). LMS can handle up to 2,000 bytes (about 1,000 Korean characters).
Q. How many bytes is an emoji?
A. Most emojis are 4 bytes in UTF-8. Complex emojis (skin tones, combined emojis) use even more bytes.
Q. Why is meta description important for SEO?
A. Meta descriptions appear in search results and directly affect click-through rate (CTR). Proper length and relevant keywords are crucial.
Q. Does Twitter count Korean characters as 1?
A. Yes, Twitter uses Unicode-based counting where Korean and English characters both count as 1. The 280 character limit applies equally to all languages.
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