Text - ASCII Conversion
Convert between plain text and ASCII
Features
Two-way between text and ASCII
Convert both from characters to numeric codes and from numeric codes to characters
Choose from two delimiters
Specify ASCII output as space-separated or comma-separated
Choose how to handle non-ASCII characters
Switch between showing a warning or converting to UTF-8 bytes
Convert up to 1 million characters
Convert long text and source code all at once
How to use
Select the conversion direction tab
Decide the direction with the "Text -> ASCII" or "ASCII -> Text" tab
Enter what to convert
Enter text, or space- or comma-separated ASCII codes, in the input field
Set the delimiter and non-ASCII handling
Choose the delimiter and how non-ASCII characters are handled with radio buttons
Show the result with the convert button
Press the convert button and the conversion result is shown in the output field
Use cases
Check character codes
Quickly look up the ASCII code value that corresponds to a specific character
Learn programming
Deepen your understanding by actually converting the correspondence between characters and codes
Restore numeric data
Turn ASCII code sequences in logs or data back into readable strings
Investigate the cause of garbled text
Expand non-ASCII characters to UTF-8 bytes to check encoding issues
Basic Knowledge
What is ASCII
ASCII is the oldest character encoding standard, assigning numbers 0–127 to 128 alphanumeric characters and basic symbols. For example, uppercase A is assigned 65, and lowercase a is assigned 97.
Japanese Cannot Be Represented in ASCII
ASCII defines only alphanumeric characters and symbols, so hiragana and kanji have no assigned numbers. To represent text containing Japanese, you need to use character encodings that extend ASCII, such as Unicode (UTF-8).
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.
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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.