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Editorial Team
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Asked: 2026-05-29T07:54:33+00:00

I need to write a regular expression that should allow standard characters [a-zA-Z0-9] plus

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I need to write a regular expression that should allow standard characters [a-zA-Z0-9] plus one space between each word, the umlauts [äöüÄÖÜ], a dot (.) and a hyphen (-) and no other special characters.

For Example :

Following should be allowed:

Dr. Aaryan Joshi    
Phill Rozer MSc.    
Ajay Verma5    
Rajan-Verma MSc.

And following should not be allowed:

Ajay     Verma
Dr. Ajay. Verma.
Test Name.-.Name2
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1 Answer

  1. Editorial Team

    Try this (in JavaScript, to match your comment above)

    <!DOCTYPE html>
<html>
    <head>
        <script type="text/javascript">
            // All "true"
            alert(test("Dr. Aaryan Joshi"));
            alert(test("Phill Rozer MSc."));
            alert(test("Ajay Verma5"));
            alert(test("Rajan-Verma MSc."));

            // All "false"
            alert(test("Ajay     Verma"));
            alert(test("Dr. Ajay. Verma."));
            alert(test("Test Name.-.Name2"));

            function test( name ) {
                var pattern = /^(?=[^.]*\.?[^.]*$)(?!.* $)([A-Za-z0-9äöüÄÖÜ.-]+( |$))+$/;
                /*
                 * (?=[^.]*\.?[^.]*$)
                 *  - Contains zero or one dots (.)
                 * (?!.* $)
                 * - Does not end with a space (as in stema's answer)
                 * ([A-Za-z0-9äöüÄÖÜ.-]+( |$))
                 * - Matches chars specified, ending with one space or end of string
                 * 
                 * (Whole pattern is anchored to start & end of string too)
                 */
                return pattern.test(name);
            }
        </script>
    </head>
    <body>

    </body>
</html>
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