RegexTester is a tool to validate strings against regular expressions. It uses the NSPredicate regular expression mechanism to check if strings match a certain expression. After launching the application, the user can enter a regular expression and a string to validate in the two input fields. Saved values can be stored by clicking on the Save-Button and will remain after the application is closed. Clearing the regular expressions and strings to test can be done in the File menu.
Blinged JSON Validator is a free app to validate JSON files with syntax highlighting, whitespace indentation, error messaging, and hotkeys.
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