Automatic Captcha Verification using JavaScript Last Updated : 23 May, 2022 Summarize Comments Improve Suggest changes Share Like Article Like Report Captcha: Captcha is a program used to protects websites through bots. It generates some tests that human can read and pass it but current computer can not do. For example, humans can read distorted text but computer can not read. The CAPTCHA is the abbreviation of Completely Automated Public Turing Test To Tell Computers and Humans Apart. There are many paid software in market which detect captcha code. The Tessaract.js library is used to identifying numbers from the text. Note: Its prediction is not 100% accurate however it can improve accuracy by using the str.replace("", "") method. Only numeric captcha can be solved easily by using this method. Example: html <!DOCTYPE html> <html> <head> <title> Auto captcha verification </title> <script src = 'https://cdn.rawgit.com/naphtha/tesseract.js/1.0.10/dist/tesseract.js'> </script> </head> <body> <img id = "img" src = "https://i.ibb.co/L97ShyB/download.jpg" /> <div id = "GFG"></div> <!-- script for auto captcha verification --> <script> let progress = document.querySelector('#GFG'); Tesseract.recognize('https://i.ibb.co/L97ShyB/download.jpg') .progress(function(p) { progress.innerHTML += JSON.stringify(p) + "<br>" }) .then(function(result) { var captcha = result.text; alert(captcha) }) </script> </body> </html> Output: Comment More infoAdvertise with us Next Article JavaScript Form Validation M md1844 Follow Improve Article Tags : JavaScript Web-Programs Similar Reads Create an OTP Verification Form in HTML CSS & JavaScript When the application is loaded, there is a button through which the user can generate the OTP. Once the user generates the OTP, the form for verification becomes visible, the user needs to enter the correct OTP that is generated. When the user enters the OTP in the input field, and if the OTP matche 4 min read Password Validation Form Using JavaScript The password Validation form is used to check the password requirements such as the password must have at least one Uppercase, or lowercase, number, and the length of the password. We can also check this after submitting the form but it's not recommended. We can easily check before submitting the fo 4 min read Create a Password Validator using Bootstrap & JavaScript A password validator assesses password strength by verifying if it meets predetermined criteria like length, inclusion of uppercase and lowercase letters, digits, and symbols. It ensures robust security measures for user authentication and data protection. PrerequisitesHTMLBootstrapJavaScriptApproac 3 min read JavaScript Form Validation JavaScript form validation checks user input before submitting the form to ensure it's correct. It helps catch errors and improves the user experience.What we are going to CreateIn this article, we will guide you through creating a form validation application. This application will validate essentia 10 min read JavaScript Application For Email Validation The Email Validation Project in JavaScript aims to create an efficient system for verifying the authenticity and format of email addresses. This tool ensures data accuracy, reduces errors, and enhances the user experience by preventing invalid email submissions.Project PreviewEmail validation Applic 4 min read Validate a password using HTML and JavaScript Validating a password using HTML and JavaScript involves ensuring that user-entered passwords meet certain criteria, such as length, complexity, or character types (e.g., uppercase, lowercase, numbers, and symbols). This process enhances security by enforcing strong password requirements before form 2 min read Like