Case Converter
Convert the case of text
Features
Supports 18 notation styles
Covers developer naming conventions such as camel and snake
Partial conversion of only the selection
Supports converting only part of the text
Includes a history of conversion results
Try multiple conversion types and compare the results
Automatic counting of characters and more
Shows character, word, and line counts as you type
How to Use
Enter the text before conversion
Paste text into the input field. Loading an example with the sample button is also possible
Select a conversion type from the list
Each type shows a conversion example. Specify the notation style that fits your purpose
Show the result with the convert button
Running it shows the converted text. While a range is selected, only that part is reflected
Copy or download the result
Copy to the clipboard with the copy button, or save as a text file with download
Move through history with back and forward
Return to past conversion results anytime. Clear them all at once with history reset
Use Cases
Unifying variable and function naming
Batch-convert identifiers in code to camel or snake to comply with conventions
Tidying up English title notation
Format article and paper headings into title case or sentence case
Creating URL slugs
Convert English article titles into kebab case to use in URLs
Converting the format of data field names
Align CSV and API field names to the destination system's naming format to ensure consistency
Text decoration for social media
Use playful notation such as alternating case to style the look of posts and messages
Basic Knowledge
Common Naming Conventions
In programming, there are established styles for writing names that combine multiple words, and different styles are used depending on the language and purpose.
- camelCase：camelCase capitalizes only the first letter of the second and subsequent words, and is used in JavaScript variable names and similar contexts.
- snake_case：snake_case connects words with underscores and is used in Python variable names and database field names.
- kebab-case：kebab-case connects words with hyphens and is used in URL slugs and CSS class names.
Case Sensitivity
Computers treat uppercase and lowercase letters as distinct characters, so inconsistent capitalization in program variable names and URLs can cause errors or be treated as separate pages.
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
text 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
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.