How to Add a Character Limit To a Contact Form 7 Text Box
Adding a character limit to a Contact Form 7 text box requires a little bit of code to make it work.
The trick: You can’t use a textarea, it must be just a text field.
The code: text your-name 100/140 will give you a single line text box that is 100 characters wide and has a character limit of 140 characters.
To make the box mandatory, add a * after the text: text* your-name 100/140
It’s as beautifully simple as that.
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Thanks for your post. Can you try the instructions here and see if they work for you? https://contactform7.com/max-min-length-options-and-character-count/