Text Search & Replace
Search and replace text (supports regular expressions)
Features
Advanced search with regular expressions
Extract even complex strings in bulk with patterns
Switch between all and first-only replace
Use the replace scope to suit your needs
Highlight matched spots
Instantly preview the targets before replacing
Toggle case sensitivity
Supports flexible search including spelling variations
How to use
Enter the target text
Paste the text or data you want to edit into the input text field
Specify search and replace strings
Enter the word to find in the search string and the new word in the replace string
Set search options
Toggle replace mode, case sensitivity, and regular expressions as needed
Check the result with the replace button
Check the replacement result and copy it or save it as a text file
Use cases
Bulk-edit text
Replace typos and old notations with new wording all at once
Format and process data
Remove delimiters and unwanted characters in CSV or logs in bulk
Swap out boilerplate
Quickly convert the recipient or date in a template to another value
Bulk-rename in code
Rewrite variable and function names in bulk with regular expressions
Unify notation variations
Unify full-width/half-width and upper/lower case variations to improve quality
Basic Knowledge
What is Regex Replacement?
Regex replacement is a method of specifying patterns like "consecutive digits" or "whitespace at line start" and replacing all matching portions at once. It allows you to standardize variable notations that fixed strings cannot capture in a single operation.
Pitfalls of Batch Replacement
Replacing a short term as-is can inadvertently affect part of other terms (for example, replacing "Tokyo" might also match "Tokyo Metropolitan Area"). It is safer to verify the replacement targets by highlighting matching portions before execution.
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 search and replace 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 replacement results and input suggestions are not stored on the server.
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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.
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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.