Text - HEX Conversion
Convert between text and hexadecimal (HEX)
Features
Supports two-way HEX conversion
From text to hexadecimal, and from hexadecimal to the original characters
UTF-8 multi-byte support
Accurately convert Japanese and emoji byte by byte
Finely adjust the output format
Choose the casing, delimiter, and prefix
Restore with flexible delimiter parsing
Automatically parse hexadecimal that mixes spaces and colons
How to use
Select the conversion mode
Choose the encode or decode button to decide the conversion direction
Enter the target data
Paste text or a hexadecimal string into the input field
Set the output format
Choose the casing, delimiter, and prefix
Check the result with the convert button
Press the button to convert and copy the result to use
Use cases
Check character codes
Quickly look up the hexadecimal code a specific character has
Analyze communication data
Restore dumped hexadecimal to a readable string to check it
Debug programs
Verify the correspondence between hexadecimal notation in source and the actual characters
Generate escape sequences
Output byte sequences with 0x or \x prefixes ready to paste into code
Foundational Knowledge
How Characters Become Hexadecimal
Computers store characters as byte sequences like UTF-8, and the hexadecimal representation of a character is each byte written as 2 hexadecimal digits. For example, the character "あ" becomes 3 bytes in UTF-8: E3 81 82.
Meaning of Prefixes like 0x and %
Even though they represent the same hexadecimal number, conventions differ depending on context: 0xE3 in programming, %E3 in URL encoding. The underlying byte sequence is identical; only the notation differs.
Safety and privacy
Runs entirely in your browser
Your input data is processed only within your browser and is never sent externally.
Processing only in your browser
the conversion is processed entirely within your browser, and input data is not sent to any server.
Communications encrypted with HTTPS
Page loading is also encrypted by TLS, and content cannot be read by third parties.
No transmission to third parties
Input content is not sent to external services such as ad networks or trackers.
No automatic saving of results
the input text and conversion results and input suggestions are not stored on the server.
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RAKKOTOOLS is free to use!
Available free of charge for individuals and corporations, commercial and non-commercial use alike.No prior permission or usage application is required. Feel free to use it in various situations.
Use in streaming and videos
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Use in schools, work, and events
Can be used in various situations such as classes, team division, internal work, and events.
Introduction on Web, books, and SNS
Feel free to introduce it as a useful tool on web media, books, SNS, and other platforms.
Commercial use
Can be used for commercial purposes such as research, calculation, processing, and conversion in business and production.
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If using in streaming and videos
Link to RAKKOTOOLS in the description, or Mention or display that you are using RAKKOTOOLS in the stream or video.
Credit example for the description
Usage guidelinesYou are free to use it for normal purposes. However, use for purposes that violate laws, infringe on third-party rights, impose significant load on the service, or otherwise interfere with service operation is prohibited.
We do not guarantee the accuracy or completeness of information and calculation results obtained from each tool.
This notice is a translation of the original Japanese text. If there is any discrepancy between the translation and the original, the Japanese original takes precedence.