# Password Validator Validate password strength and check against common security requirements > Canonical page: https://elysiatools.com/en/tools/password-validator - **Category:** Security - **Keywords:** password, validator, security, strength, check, password validator, password strength ## Overview The Password Validator is a secure utility designed to assess the strength of your passwords against customizable security criteria, ensuring your credentials meet modern protection standards. ## Inputs - **Password** (text): Enter password to validate... - **Minimum Length** (number): Enter minimum password length... - **Require Uppercase Letters** (checkbox) - **Require Lowercase Letters** (checkbox) - **Require Numbers** (checkbox) - **Require Special Characters** (checkbox) ## When to use - Before setting a new password for a sensitive account or service. - When auditing existing passwords to identify weak or vulnerable entries. - During the development of user registration forms to enforce specific security policies. ## How it works - Enter the password you wish to evaluate into the input field. - Adjust the configuration settings to match your specific security requirements, such as minimum length or character types. - Submit the data to receive an instant validation report confirming if your password meets all selected criteria. ## Use cases - Verifying that new user passwords comply with corporate security policies. - Checking personal password strength before updating account credentials. - Testing password complexity requirements during application security testing. ## Frequently asked questions ### Is my password stored or sent to a server? No, this tool performs validation locally in your browser to ensure your credentials remain private and secure. ### Can I customize the minimum length requirement? Yes, you can set the minimum length anywhere between 4 and 128 characters. ### What types of character requirements can I enforce? You can toggle requirements for uppercase letters, lowercase letters, numbers, and special characters. ### Does this tool generate passwords? No, this tool is strictly for validating existing passwords against your defined security rules. ### Is this tool free to use? Yes, the Password Validator is a free utility tool available for unlimited use. ## Related tools - [AGEX Passphrase Strength Checker](https://elysiatools.com/en/tools/agex-passphrase-strength-checker): Evaluate a passphrase for AGEX file bundles and recommend the most suitable protection profile - [Security Headers Checker](https://elysiatools.com/en/tools/security-headers-checker): Audit HTTP response headers for security compliance — parses the raw headers you paste (no network) and grades them against the OWASP secure-header set with value-level checks: HSTS max-age, CSP unsafe-inline/eval, X-Content-Type-Options, Referrer-Policy, Permissions-Policy, COOP/COEP/CORP and more. Outputs a letter grade (A+ to F) plus per-header findings with copy-ready fix recommendations. - [Env File Secret Rotation Planner](https://elysiatools.com/en/tools/env-file-secret-rotation-planner): Paste a .env file and get a staged secret-rotation plan. Detects database URLs, API keys, auth tokens, private keys, cloud credentials, payment keys and encryption secrets, scores each by exposure and age, and schedules them across a 4-week rotation timeline with a dual-key checklist and a generated .env.example. Optional last-rotated dates and a configurable cadence (30/90/180/365 days) drive compliance scoring. - [ML-KEM / Kyber Keypair & Encapsulation Tester](https://elysiatools.com/en/tools/ml-kem-kyber-keypair-and-encapsulation-tester): Generate ML-KEM-512/768/1024 (FIPS 203 / CRYSTALS-Kyber) keypairs, encapsulate a random shared secret against the public key, decapsulate it with the private key, and verify both sides match — with the exact wire sizes of all three parameter sets checked live against the standard. - [URL Safety Checker](https://elysiatools.com/en/tools/url-safety-checker): Detect phishing and fraud signals in a URL by deep structural analysis — punycode/IDN homograph attacks (mixed Latin/Cyrillic), embedded credentials (user:pass@host trick), high-risk TLDs, double-encoding and control-character smuggling, subdomain brand deception, and numeric/IP host obfuscation. Static analysis only, no network. Complements the URL Validator (which does basic protocol/IP checks). - [PKCE Code Verifier & Challenge Generator](https://elysiatools.com/en/tools/pkce-code-verifier-generator): Generate, validate and verify OAuth2 / OIDC PKCE (RFC 7636) code_verifier and S256 code_challenge pairs. Three modes: (1) generate a fresh verifier + challenge from cryptographically secure random bytes at 256/384/512/768-bit entropy, (2) audit a verifier you already have against the RFC — length (43–128), charset \[A-Za-z0-9-._~\] and ≥256-bit entropy, and (3) verify a verifier/challenge pair by recomputing BASE64URL(SHA256(verifier)). Optionally build the full authorization-request URL and token-exchange body. Complements the generic nonce-generator (which only emits a verifier+challenge pair) with RFC-compliance auditing and pair verification. - [Batch Email Validator](https://elysiatools.com/en/tools/batch-email-validator): Validate multiple email addresses at once with format checking and basic quality analysis - [Batch URL Validator](https://elysiatools.com/en/tools/batch-url-validator): Validate multiple URLs at once with format checking and security analysis ## 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 - [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.