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Utf8 validator

World's simplest utf8 tool

World's simplest browser-based UTF8 encoding error checker. Just import your UTF8 data in the editor on the left and this tool will instantly validate its encoding. Free, quick, and very powerful. Import UTF8 – validate UTF8. Created by geeks for geeks.
love ascii more than utf8? [ -~]
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Utf8 validator tool What is a utf8 validator?
With this tool you can easily find all errors in UTF8-encoded text. Valid UTF8 has a specific binary format. If it's a single byte UTF8 character, then it is always of form '0xxxxxxx', where 'x' is any binary digit. If it's a two byte UTF8 character, then it's always of form '110xxxxx10xxxxxx'. Similarly for three and four byte UTF8 characters it starts with '1110xxxx' and '11110xxx' followed by '10xxxxxx' one less times as there are bytes. This tool will locate mistakes in the encoding and tell you where they occured.
Utf8 validator examples Click to use
Invalid UTF8
This example shows a red badge because the input UTF8 has an encoding error at byte 59. Byte 59 indicates that there should be a two byte sequence following it but only one byte follows. This is malformed UTF8.
Not all text is created equal. Some is missing bytes. ðŸŒ
Valid UTF8
This example shows a green badge because the input UTF8 is valid.
Running 🏃 is faster than swimming 🏊.
Pro tips Master online utf8 tools
You can pass input to this tool via ?input query argument and it will automatically compute output. Here's how to type it in your browser's address bar. Click to try!
https://onlineutf8tools.com/validate-utf8?input=Not%20all%20text%20is%20created%20equal.%20Some%20is%20missing%20bytes.%20%C3%B0%C5%B8%C5%92
All utf8 tools
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Quickly convert UTF8 symbols to binary bits.
Quickly convert binary bits to UTF8 symbols.
Quickly convert UTF8 text to octal values.
Quickly convert octal numbers to UTF8 symbols.
Quickly convert UTF8 data to decimal numbers.
Quickly convert decimal numbers to UTF8 data.
Quickly convert UTF8 characters to hex numbers.
Quickly convert hex numbers to UTF8 characters.
Quickly convert UTF8 text to base64 encoding scheme.
Quickly convert base64-encoded data to UTF8 text.
Quickly convert UTF8 to arbitrary base values.
Quickly convert arbitrary base numbers to UTF8.
Quickly convert a UTF8 string to a Data URI.
Quickly convert a Data URI to a UTF8 string.
Quickly create an image from UTF8 text.
Quickly make all UTF8 chars lowercase.
Quickly make all UTF8 chars uppercase.
Quickly randomize UTF8 characters' case.
Quickly convert all symbols in UTF8 text to HTML codes.
Quickly convert HTML codes to UTF8 symbols.
Quickly URL-escape UTF8 strings.
Quickly URL-unescape previously URL-escaped UTF8 strings.
Quickly convert UTF8-encoded data to raw bytes.
Quickly convert raw bytes to UTF8-decoded data.
Quickly convert UTF8 encoding to ASCII encoding.
Quickly convert ASCII encoding to UTF8 encoding.
Quickly convert UTF8 encoding to UTF16 encoding.
Quickly convert UTF16 data to UTF8 data.
Quickly convert UTF8 encoding to UTF32 encoding.
Quickly convert UTF32 data to UTF8 data.
Quickly generate random UTF8 data.
Check UTF8 encoding for errors and report them.
Coming soon These utf8 tools are on the way
Convert UTF8 to Code Points
Extract Unicode code points from UTF8 characters.
Convert Code Points to UTF8
Convert Unicode code points to UTF8-encoded characters.
Flip UTF8 Bits
Invert one or more bits in every UTF8 byte.
Shuffle UTF8 Bits
Shuffle bits in every UTF8 byte.
Convert UTF8 to Morse Code
Convert UTF8 symbols to a Morse Code signal.
Convert Morse Code to UTF8
Convert a Morse Code signal to UTF8 symbols.
Convert UTF8 to ANSI
Convert UTF8 encoding to ANSI encoding.
Convert ANSI to UTF8
Convert ANSI encoding to UTF8 encoding.
Convert UTF8 to EBCDIC
Convert UTF8 encoding to EBCDIC encoding.
Convert EBCDIC to UTF8
Convert EBCDIC encoding to UTF8 encoding.
Convert UTF8 to Latin1
Convert UTF8 encoding to ISO-8859-1 encoding.
Convert Latin1 to UTF8
Convert ISO-8859-1 encoding to UTF8 encoding.
Convert UTF8 to KOI8
Convert UTF8 encoding to KOI-8 and KOI8-R encodings.
Convert KOI8 to UTF8
Convert KOI8 and KOI8-R encodings to UTF8 encoding.
Find UTF8 Length
Calculate the length of UTF8 text, character-wise and byte-wise.
Reverse a UTF8 String
Reverse the order of all UTF8 characeters.
Shuffle UTF8 Characters
Randomize the order of all UTF8 symbols.
Rotate UTF8 Characters
Cyclically rotate a UTF8 string to the left or to the right.
Create Art from UTF8
Convert text and images into UTF8 art.
Draw a UTF8 Character Table
Draw all codepoints and create a UTF8 table.