There is no correct answer for this expiration value. The expiration window for a captcha window can be set in 1, 5, 10, 15 or 30 minutes.
Support configurable captcha code expiration. Note that Captcha for Forms is a free add-on, so you agreed that the description must contain the words Protected by xfanatical. In the Settings tab, you will be able to customize the title, the description and the error text when the captcha code is expired or wrong. Write in your language to make it native and formal. 
This version added major updates on the interface. As a downside, it will request from you an extra permission of connecting external service. As other users reported copying the index.html file hangs the computer, this version move this HTML file to the cloud storage. In this version, you only need to copy bundle.js rather than bundle.js and index.html.
Version 1.3.1įix an issue of captcha code not refreshing. Bots cannot easily get through a dynamic challenge Release updates Version 1.3.2Īdded a Factory reset button in About tab in case of screwing up. If they tried to submit garbage responses, this captcha challenge will block them away. Now share the form with your audience in public. So I suggest to toggle the Captcha only after you finished polishing your form.
You will see a captcha code question being generated and refreshed in every minute.Ĭaptcha for forms adds a code challenge to respondents to protect forms from spamsĮach time you turn off and on the Captcha, a new question column is added to your response sheet. And click Captcha for Forms > Start again. At the first time of running the script, you would be prompted with a Authorization Dialog, accept the permissions. Now you will see and click the add-on icon, then click Captcha for Forms > Start. Once you are done with the script editor, go back to your form. If you have no idea how to add them, follow this article, How to Add an Apps Script to Your Google Docs. Copy bundle.js to your form's script editor. Download the Captcha for Forms apps script. 
The add-on may dysfunction under multiple Google Account sign-in.
Make sure you have single Google Account sign-in. Setup Captcha for Formsįirst of all, due to some technical limitations of this application, we decided to release this add-on as a free apps script, instead of posting it on the Chrome web store. Check out 3 Ways To Protect Google Forms From Spamming. Of course, there are other hacks to reduce spams. 
The following screenshot illustrates a bot fails to meet the code challenge. It significantly decreases bot spamming your forms. It verifies the human identity by requesting the correct input of a constantly changing challenge code (captcha). Welcome and thanks for the interest of using Captcha for Forms (Google Forms Captcha).Ĭaptcha for Forms is a free Google forms addon that aims to fight spams.
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