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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 from team Browserling.
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What is a utf8 validator?
learn more about this tool
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 useInvalid 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
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 extract code points from UTF8 values.
Quickly create UTF8-encoded characters from code points.
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 a picture 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
Edit UTF8
Load UTF8 data in a neat browser-based editor.
Debug UTF8
Split UTF8 data into byte sequences and visualize them.
Flip UTF8 Bits
Invert one or more bits in every UTF8 byte.
Shuffle UTF8 Bits
Shuffle bits in every UTF8 byte.
Convert UTF8 to UTF1
Convert UTF8-encoded data to UTF1-encoded data.
Convert UTF1 to UTF8
Convert UTF1-encoded data to UTF8-encoded data.
Convert UTF8 to UTF2
Convert UTF8 encoding to UTF2 encoding.
Convert UTF2 to UTF8
Convert UTF2 encoding to UTF8 encoding.
Convert UTF8 to UTF7
Convert UTF8 data to UTF7 data.
Convert UTF7 to UTF8
Convert UTF7 data to UTF8 data.
Convert UTF8 to UTF9
Convert UTF8 data to UTF9 data.
Convert UTF9 to UTF8
Convert UTF9 data to UTF8 data.
Convert UTF8 to UTF18
Convert UTF18 data to UTF8 data.
Convert UTF9 to UTF8
Convert UTF9 data to UTF8 data.
Convert UTF8 to UTF64
Convert UTF8 data to UTF64 data.
Convert UTF64 to UTF8
Convert UTF64 data to UTF8 data.
Convert UTF8 to WTF8
Convert UTF8 data to WTF8 data.
Convert WTF8 to UTF8
Convert WTF8 data to UTF8 data.
Convert UTF8 to FSS-UTF
Convert UTF8 encoding to FSS-UTF encoding.
Convert FSS-UTF to UTF8
Convert FSS-UTF encoding to UTF8 encoding.
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.
Convert UTF8 to HZ Encoding
Convert UTF8 string to HZ encoding.
Convert HZ Encoding to UTF8
Convert HZ-encoded data to UTF8 data.
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.
Find UTF8 Length
Calculate the length of UTF8 text, character-wise and byte-wise.
Reverse a UTF8 String
Reverse the order of all UTF8 characters.
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.
Introduce Errors in UTF8
Randomly flip bits and insert invalid continuation bytes.
Generate Invalid UTF8
Create UTF8 that has invalid byte sequences in it.
Analyze UTF8
Analyze input UTF8 data and print byte sequence statistics.
Let Zalgo Destroy UTF8
Unleash Zalgo on UTF8 and destroy it.
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@browserling
We're Browserling — a friendly and fun cross-browser testing company powered by alien technology. At Browserling we love to make developers' lives easier, so we created this collection of online UTF8 tools. Unlike many other tools, we made our tools free, without intrusive ads, and with the simplest possible user interface. Our online UTF8 tools are actually powered by our programming tools that we created over the last couple of years. Check them out!
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If you love our tools, then we love you, too! Use coupon code UTF8LING to get a discount at Browserling.
Privacy Policy
we don't log data!
All conversions and calculations are done in your browser using JavaScript. We don't send a single bit about your input data to our servers. There is no server-side processing at all. We use Google Analytics and StatCounter for site usage analytics. Your IP address is saved on our web server, but it's not associated with any personally identifiable information. We don't use cookies and don't store session information in cookies. We use your browser's local storage to save tools' input. It stays on your computer.
Terms of Service
the legal stuff
By using Online Utf8 Tools you agree to our Terms of Service. TLDR: You don't need an account to use our tools. All tools are free of charge and you can use them as much as you want. You can't do illegal or shady things with our tools. We may block your access to tools, if we find out you're doing something bad. We're not liable for your actions and we offer no warranty. We may revise our terms at any time.