# Strong Password Validator Validate password strength against common security requirements (uppercase, lowercase, numbers, special chars, length) > Canonical page: https://elysiatools.com/en/tools/strong-password-validator - **Category:** Validation - **Keywords:** password, strength, validator, security, strong, complexity, requirements ## Overview The Strong Password Validator checks if a password meets common security requirements by verifying the presence of uppercase letters, lowercase letters, numbers, special characters, and a minimum length. ## Inputs - **Password** (text): Enter password to validate... - **Minimum Length** (number): 8 ## When to use - When creating user accounts to enforce strong password policies during registration. - For security audits to validate existing passwords against complexity standards. - In educational settings to demonstrate and teach password best practices. ## How it works - Enter the password to validate in the input field. - Optionally set a custom minimum length; the default is 8 characters. - The tool analyzes the password for required character types: uppercase, lowercase, numbers, and special characters. - It returns a text result indicating if the password is strong or lists missing criteria. ## Use cases - Integrating into web forms to ensure users create strong passwords during sign-up. - Auditing password strength in organizational security compliance checks. - Helping individuals test and improve their personal passwords for online accounts. ## Frequently asked questions ### What character types does the validator check for? It checks for uppercase letters, lowercase letters, numbers, and special characters like !, @, #, etc. ### Can I adjust the minimum password length? Yes, you can specify a custom minimum length; the default is 8 characters. ### Does the tool store or log the passwords entered? No, passwords are not stored; validation is performed in real-time without logging. ### What happens if the password is weak? The result text will indicate which criteria are missing, such as lacking special characters or being too short. ### Is the validation based on common security standards? Yes, it aligns with typical password policies requiring a mix of character types and minimum length. ## Related tools - [.env File Validator](https://elysiatools.com/en/tools/env-file-validator): Validate .env files for syntax errors and common issues - [Global Phone Validator](https://elysiatools.com/en/tools/global-phone-validator): Validate phone numbers from multiple countries including China, US, and more with detailed formatting and carrier info - [IBAN Validator](https://elysiatools.com/en/tools/iban-validator): Validate International Bank Account Numbers (IBAN) - [IMEI Validator](https://elysiatools.com/en/tools/imei-validator): Validate IMEI numbers for mobile devices using Luhn checksum algorithm - [IMSI Validator](https://elysiatools.com/en/tools/imsi-validator): Validate IMSI numbers for mobile subscribers with MCC/MNC analysis - [Mod-11 Checksum Calculator](https://elysiatools.com/en/tools/mod11-checksum): Validate or generate numbers using the Modulus-11 (ISO 7064) check-digit algorithm with ISBN-10 (10..2), Norwegian-ID (3,7,6,1,8,9,4,5,2) and generic 2-7 weight schemes. - [Passport Validator](https://elysiatools.com/en/tools/passport-validator): Validate passport numbers from different countries (China, USA, Japan, etc.) - [Phone Validator](https://elysiatools.com/en/tools/phone-validator): Validate and format phone numbers internationally ## Samples - [Strong Password Samples](https://elysiatools.com/en/samples/strong-password): Collection of passwords with varying strength levels for testing password validation - [Android Image Processing Java Samples](https://elysiatools.com/en/samples/android-image-processing-java): Android Java image processing examples including reading/saving images, scaling, and format conversion - [Android Image Processing Kotlin Samples](https://elysiatools.com/en/samples/android-image-processing-kotlin): Android Kotlin image processing examples including reading/saving images, scaling, and format conversion - [Web Image Processing Python Samples](https://elysiatools.com/en/samples/web-image-processing-python): Web Python image processing examples using PIL/Pillow including reading, saving, resizing, and format conversion ## Related content - [Application Field Policy Validation](https://elysiatools.com/en/hubs/application-field-policy-validation): Define and test product-owned password and color-code rules while separating application allowlists and ranges from generic validator results. - [Credential and JWT Security Workflow](https://elysiatools.com/en/hubs/auth-token-security): Generate or validate password credentials and inspect JWT security signals without treating key pairs as passwords.