Encodings
| HTML Entity (decimal) | � |
| HTML Entity (hex) | � |
| How to type in Microsoft Windows | Alt + FFFD |
| UTF-8 (hex) | 0xEF 0xBF 0xBD (efbfbd) |
| UTF-8 (binary) | 11101111:10111111:10111101 |
| Name: | Replacement Character |
|---|---|
| HTML Entity: | � � |
| UTF-8 Encoding: | 0xEF 0xBF 0xBD |
| UTF-16 Encoding: | 0xFFFD |
| UTF-32 Encoding: | 0x0000FFFD |
Why did UTF-8 replace the ASCII character-encoding standard?
Answer: The UTF-8 replaced ASCII because it contained more characters than ASCII that is limited to 128 characters. Explanation: Both ASCII UTF-8 are used for encoding characters in computer communication. UTF-8 was favored over ASCII because it provided more characters than is available in ASCII making it more acceptable world over.
How to identify non UTF8 characters?
We can break down the command above to find out what each part is doing:
- -f: Represents the original file format. We’ve defined it as utf-8 in our example above
- -t: Represents the target file format that we want to convert to.
- -c: Skips any invalid sequences
- FILE: Represents the file we want to remove invalid characters from.
How to configure UTF8 character set in Oracle?
To configure the NLS_LANG registry variable of the Oracle 11g client to support Unicode:
- From the Windows Start menu, select Run , type regedit, and then click OK . ...
- In the left pane, expand My Computer, HKEY_LOCAL_MACHINE, SOFTWARE, ORACLE , and KEY_OraClient11g_home1 .
- In the right pane, right-click NLS_LANG and select Modify from the context menu. ...
- Type AMERICAN_AMERICA.UTF8 in the Variable data field, and then click OK .
Is not UTF 8 encoded?
Successfully merging a pull request may close this issue.
What is modified UTF-8?
What is the UTF-1 character set?
How many bytes are in CESU-8?
What is UTF-8 Mb3?
What is the correct encoding of a code point?
How many bits per byte is UTF-8?
What is UTF-8 encoding?
See more
About this website
How do you write a replacement character?
U+FFFC  OBJECT REPLACEMENT CHARACTER, placeholder in the text for another unspecified object, for example in a compound document. U+FFFD � REPLACEMENT CHARACTER used to replace an unknown, unrecognized, or unrepresentable character.
What is the object replacement character?
(computing) The object replacement character, sometimes used to represent an embedded object in a document when it is converted to plain text.
Can UTF-8 handle all characters?
UTF-8 is capable of encoding all 1,112,064 valid character code points in Unicode using one to four one-byte (8-bit) code units.
What characters are not allowed in UTF-8?
0xC0, 0xC1, 0xF5, 0xF6, 0xF7, 0xF8, 0xF9, 0xFA, 0xFB, 0xFC, 0xFD, 0xFE, 0xFF are invalid UTF-8 code units. A UTF-8 code unit is 8 bits. If by char you mean an 8-bit byte, then the invalid UTF-8 code units would be char values that do not appear in UTF-8 encoded text.
How do I type Unicode characters?
Inserting Unicode characters To insert a Unicode character, type the character code, press ALT, and then press X. For example, to type a dollar symbol ($), type 0024, press ALT, and then press X. For more Unicode character codes, see Unicode character code charts by script.
What is Fffc in Unicode?
Unicode Character “” (U+FFFC)  Name: Object Replacement Character.
Why did UTF-8 replace the ASCII character and coding standard?
Why did UTF-8 replace the ASCII character-encoding standard? UTF-8 can store a character in more than one byte. UTF-8 replaced the ASCII character-encoding standard because it can store a character in more than a single byte. This allowed us to represent a lot more character types, like emoji.
How do I change my UTF-8 encoding?
Click Tools, then select Web options. Go to the Encoding tab. In the dropdown for Save this document as: choose Unicode (UTF-8). Click Ok.
Is UTF-8 and ASCII same?
For characters represented by the 7-bit ASCII character codes, the UTF-8 representation is exactly equivalent to ASCII, allowing transparent round trip migration. Other Unicode characters are represented in UTF-8 by sequences of up to 6 bytes, though most Western European characters require only 2 bytes3.
What are all UTF-8 characters?
Complete Character List for UTF-8CharacterDescriptionEncoded Byte#NUMBER SIGN (U+0023)23$DOLLAR SIGN (U+0024)24%PERCENT SIGN (U+0025)25&ERSAND (U+0026)26175 more rows
Is UTF-8 and Unicode the same?
The Difference Between Unicode and UTF-8 Unicode is a character set. UTF-8 is encoding. Unicode is a list of characters with unique decimal numbers (code points).
What is a non UTF-8 character?
Non-UTF-8 characters are characters that are not supported by UTF-8 encoding and, they may include symbols or characters from foreign unsupported languages.
️ ️ ★ Unicode Character Table
Unicode web service for character search. Find, copy and paste your favorite characters: 😎 Emoji, Hearts, 💲 Currencies, → Arrows, ★ Stars and many others 🚩
Complete Character List for UTF-8 - FileFormat.Info
Complete Character List for UTF-8. Character Description Encoded Byte � NULL (U+0000) 00 START OF HEADING (U+0001)
Unicode/UTF-8-character table
UTF-8 encoding table and Unicode characters page with code points U+0000 to U+00FF We need your support - If you like us - feel free to share. help/imprint (Data Protection)
FAQ - UTF-8, UTF-16, UTF-32 & BOM - Unicode
Q: Can a UTF-8 data stream contain the BOM character (in UTF-8 form)? If yes, then can I still assume the remaining UTF-8 bytes are in big-endian order?
HTML UTF-8 Reference
Tip: The first 128 characters of Unicode (which correspond one-to-one with ASCII) are encoded using a single octet with the same binary value as ASCII, making valid ASCII text valid UTF-8-encoded Unicode as well.
UTF-8 Decode - Convert UTF-8 to Text - Online - Browserling Web ...
Useful, free online tool for that converts UTF8-encoded data to text. No ads, nonsense, or garbage, just a UTF8 decoder. Press a button – get the result.
What is modified UTF-8?
In Modified UTF-8, the null character (U+0000) uses the two-byte overlong encoding 11000000 10000000 (hexadecimal C0 80 ), instead of 00000000 (hexadecimal 00 ). Modified UTF-8 strings never contain any actual null bytes but can contain all Unicode code points including U+0000, which allows such strings (with a null byte appended) to be processed by traditional null-terminated string functions. All known Modified UTF-8 implementations also treat the surrogate pairs as in CESU-8 .
What is the UTF-1 character set?
The International Organization for Standardization (ISO) set out to compose a universal multi-byte character set in 1989. The draft ISO 10646 standard contained a non-required annex called UTF-1 that provided a byte stream encoding of its 32-bit code points. This encoding was not satisfactory on performance grounds, among other problems, and the biggest problem was probably that it did not have a clear separation between ASCII and non-ASCII: new UTF-1 tools would be backward compatible with ASCII-encoded text, but UTF-1-encoded text could confuse existing code expecting ASCII (or extended ASCII ), because it could contain continuation bytes in the range 0x21–0x7E that meant something else in ASCII, e.g., 0x2F for '/', the Unix path directory separator, and this example is reflected in the name and introductory text of its replacement. The table below was derived from a textual description in the annex.
How many bytes are in CESU-8?
Unicode Technical Report #26 assigns the name CESU-8 to a nonstandard variant of UTF-8, in which Unicode characters in supplementary planes are encoded using six bytes, rather than the four bytes required by UTF-8.
What is UTF-8 Mb3?
In MySQL, the utf8mb3 character set is defined to be UTF-8 encoded data with a maximum of three bytes per character , meaning only Unicode characters in the Basic Multilingual Plane (i.e. from UCS-2) are supported. Unicode characters in supplementary planes are explicitly not supported. utf8mb3 is deprecated in favor of the utf8mb4 character set, which uses standards-compliant UTF-8 encoding. utf8 is an alias for utf8mb3, but is intended to become an alias to utf8mb4 in a future release of MySQL. It is possible, though unsupported, to store CESU-8 encoded data in utf8mb3, by handling UTF-16 data with supplementary characters as though it is UCS-2.
What is the correct encoding of a code point?
The standard specifies that the correct encoding of a code point uses only the minimum number of bytes required to hold the significant bits of the code point. Longer encodings are called overlong and are not valid UTF-8 representations of the code point.
How many bits per byte is UTF-8?
UTF-8's use of six bits per byte to represent the actual characters being encoded, means that octal notation (which uses 3-bit groups) can aid in the comparison of UTF-8 sequences with one another and in manual conversion.
What is UTF-8 encoding?
UTF-8 is a variable-width character encoding used for electronic communication. Defined by the Unicode Standard, the name is derived from Unicode (or Universal Coded Character Set) Transformation Format – 8-bit. UTF-8 is capable of encoding all 1,112,064 valid character code points in Unicode using one to four one- byte (8-bit) code units.
What is modified UTF-8?
In Modified UTF-8, the null character (U+0000) uses the two-byte overlong encoding 11000000 10000000 (hexadecimal C0 80 ), instead of 00000000 (hexadecimal 00 ). Modified UTF-8 strings never contain any actual null bytes but can contain all Unicode code points including U+0000, which allows such strings (with a null byte appended) to be processed by traditional null-terminated string functions. All known Modified UTF-8 implementations also treat the surrogate pairs as in CESU-8 .
What is the UTF-1 character set?
The International Organization for Standardization (ISO) set out to compose a universal multi-byte character set in 1989. The draft ISO 10646 standard contained a non-required annex called UTF-1 that provided a byte stream encoding of its 32-bit code points. This encoding was not satisfactory on performance grounds, among other problems, and the biggest problem was probably that it did not have a clear separation between ASCII and non-ASCII: new UTF-1 tools would be backward compatible with ASCII-encoded text, but UTF-1-encoded text could confuse existing code expecting ASCII (or extended ASCII ), because it could contain continuation bytes in the range 0x21–0x7E that meant something else in ASCII, e.g., 0x2F for '/', the Unix path directory separator, and this example is reflected in the name and introductory text of its replacement. The table below was derived from a textual description in the annex.
How many bytes are in CESU-8?
Unicode Technical Report #26 assigns the name CESU-8 to a nonstandard variant of UTF-8, in which Unicode characters in supplementary planes are encoded using six bytes, rather than the four bytes required by UTF-8.
What is UTF-8 Mb3?
In MySQL, the utf8mb3 character set is defined to be UTF-8 encoded data with a maximum of three bytes per character , meaning only Unicode characters in the Basic Multilingual Plane (i.e. from UCS-2) are supported. Unicode characters in supplementary planes are explicitly not supported. utf8mb3 is deprecated in favor of the utf8mb4 character set, which uses standards-compliant UTF-8 encoding. utf8 is an alias for utf8mb3, but is intended to become an alias to utf8mb4 in a future release of MySQL. It is possible, though unsupported, to store CESU-8 encoded data in utf8mb3, by handling UTF-16 data with supplementary characters as though it is UCS-2.
What is the correct encoding of a code point?
The standard specifies that the correct encoding of a code point uses only the minimum number of bytes required to hold the significant bits of the code point. Longer encodings are called overlong and are not valid UTF-8 representations of the code point.
How many bits per byte is UTF-8?
UTF-8's use of six bits per byte to represent the actual characters being encoded, means that octal notation (which uses 3-bit groups) can aid in the comparison of UTF-8 sequences with one another and in manual conversion.
What is UTF-8 encoding?
UTF-8 is a variable-width character encoding used for electronic communication. Defined by the Unicode Standard, the name is derived from Unicode (or Universal Coded Character Set) Transformation Format – 8-bit. UTF-8 is capable of encoding all 1,112,064 valid character code points in Unicode using one to four one- byte (8-bit) code units.
Overview
Encoding
Since the restriction of the Unicode code-space to 21-bit values in 2003, UTF-8 is defined to encode code points in one to four bytes, depending on the number of significant bits in the numerical value of the code point. The following table shows the structure of the encoding. The x characters are replaced by the bits of the code point.
The first 128 characters (US-ASCII) need one byte. The next 1,920 characters need two bytes to …
Naming
The official Internet Assigned Numbers Authority (IANA) code for the encoding is "UTF-8". All letters are upper-case, and the name is hyphenated. This spelling is used in all the Unicode Consortium documents relating to the encoding.
However, the name "utf-8" may be used by all standards conforming to the IANA list (which include CSS, HTML, XML, and HTTP headers), as the declaration is case-insensitive.
Adoption
Many standards only support UTF-8, e.g. open JSON exchange requires it (without a byte order mark (BOM)). UTF-8 is also the recommendation from the WHATWG for HTML and DOM specifications, and the Internet Mail Consortium recommends that all e-mail programs be able to display and create mail using UTF-8. The World Wide Web Consortium recommends UTF-8 as the default enc…
History
The International Organization for Standardization (ISO) set out to compose a universal multi-byte character set in 1989. The draft ISO 10646 standard contained a non-required annex called UTF-1 that provided a byte stream encoding of its 32-bit code points. This encoding was not satisfactory on performance grounds, among other problems, and the biggest problem was probably that it did not have a clear separation between ASCII and non-ASCII: new UTF-1 tools would be backward c…
Standards
There are several current definitions of UTF-8 in various standards documents:
• RFC 3629 / STD 63 (2003), which establishes UTF-8 as a standard internet protocol element
• RFC 5198 defines UTF-8 NFC for Network Interchange (2008)
• ISO/IEC 10646:2014 §9.1 (2014)
Comparison with other encodings
Some of the important features of this encoding are as follows:
• Backward compatibility: Backward compatibility with ASCII and the enormous amount of software designed to process ASCII-encoded text was the main driving force behind the design of UTF-8. In UTF-8, single bytes with values in the range of 0 to 127 map directly to Unicode code points in the ASCII range. Single bytes in this range represent characters, as they do in ASCII. M…
Derivatives
The following implementations show slight differences from the UTF-8 specification. They are incompatible with the UTF-8 specification and may be rejected by conforming UTF-8 applications.
Unicode Technical Report #26 assigns the name CESU-8 to a nonstandard variant of UTF-8, in which Unicode characters in supplementary planes are encoded using six bytes, rather than the four bytes required by UTF-8. CESU-8 encoding treats each half of a four-byte UTF-16 surrogate …