OTP Code Generator & Validator

OTP Code Generator & Validator. Generate and validate Time-based One-Time Passwords (TOTP) for 2FA. Instantly generate and verify time-based authentication tokens with our free online OTP code generator.

This essential security utility allows you to rapidly create Time-based One-Time Passwords (TOTP) and HMAC-based One-Time Passwords (HOTP) for Two-Factor Authentication (2FA) systems.

Whether you are debugging a custom authenticator app, verifying user login flows, or managing multi-factor security, our OTP validator tool provides precise code generation using standard algorithms.

If you need to generate the underlying cryptographic hashes manually, our HMAC Generator is the perfect companion utility. Simply input your base32 secret key to generate or validate your OTP instantly.

This premium 2FA token generator online executes all cryptographic calculations directly within your browser, ensuring that your sensitive authentication secrets are never exposed to remote servers.

Transmitting your TOTP or HOTP seed keys over the internet can severely compromise your multi-factor security, but our completely offline tool completely eliminates this risk, making secure OTP generation an entirely private experience.

For developers testing authentication tokens, our JWT Parser provides complementary debugging capabilities. We provide a 100% free, private, and secure way to generate and validate authenticator codes directly on your device.

How to use this online tool

OTP Code Generator & Validator is designed for fast browser workflows when you need to format, validate, convert, decode, encode, generate, or inspect data without opening a heavy desktop app. Start with the input field or visible options, review the result, then copy or download the output for the next step.

Private processing in your browser

OTP Code Generator & Validator keeps the normal processing step local in your browser. That is useful for code snippets, tokens, documents, configuration values, text samples, and other material that should not be sent to a remote service unless you explicitly choose to share it.

When this tool is useful

Use OTP Code Generator & Validator for repeatable developer tasks, technical documentation, QA checks, quick conversions, debugging, content cleanup, and internal team workflows. The page focuses on clear inputs, immediate feedback, and output that is easy to reuse in code, reports, tickets, emails, or notes.

Practical tips

Before copying the final result, check important details such as spacing, casing, filenames, encoding, token structure, line breaks, or output format. Small checks prevent mistakes when the result is reused in source code, API requests, documentation, spreadsheets, or shared files.