Validate UTF8
Validate UTF-8
Check if text contains valid UTF-8 sequences
Hello WorldValid ASCII
café 日本語Valid multi-byte
🎉🔥💻Valid emoji
Input Text
Validates UTF-8 encoding by checking each byte sequence. Detects: invalid continuation bytes, overlong encodings, out-of-range codepoints, truncated sequences, and surrogate halves. All processing is done in your browser.