Developer ToolsFree Tool

OTP Code Generator

Provided byIT Toolsit-tools.tech

Generates TOTP and HOTP one-time passwords from a shared secret, and validates submitted codes — useful for testing 2...

Use This Tool
developer-toolsbrowser-basedprivacy-focusedit-tools
Screenshot of OTP Code Generator on IT Tools
it-tools.techOpen the live tool →
About this tool

What OTP Code Generator does

OTP Code Generator on IT Tools creates one-time passwords using a shared secret, supporting both TOTP and HOTP formats. Users input a secret key and optionally a time step to generate a code that can be entered into any system accepting 2FA tokens. The tool also accepts a submitted code for validation, returning whether it is accepted or rejected. This makes it a practical utility for anyone needing to test or simulate two-factor authentication without accessing a live service. The interface is straightforward, presenting fields for the secret, time step, and code validation, with results displayed clearly beneath each control. While the page could not be fully fetched, the stored notes confirm its core function of generating and validating OTP codes for testing 2FA flows. It serves as a no-cost alternative to command-line utilities or paid testing suites, accessible directly from a web browser.

Step by step

How to use the IT Tools OTP Code Generator

  1. 1

    Open the OTP Code Generator on IT Tools

  2. 2

    Enter a shared secret key in the designated field

  3. 3

    Optionally specify a time step for TOTP generation

  4. 4

    Click Generate to produce a one-time password

  5. 5

    Enter a received code in the validation field to check its validity

Is it right for you

Best for

Developers and security professionals who need to quickly test two-factor authentication implementations without deploying a full application.

Limitations

  • No information on supported hash algorithms
  • No unit switching between time-based and counter-based modes
  • Results are estimates based on the provided secret and time step
Questions

OTP Code Generator FAQ

Can I use this tool to test both TOTP and HOTP codes?
Yes, the tool supports generating and validating both time-based (TOTP) and counter-based (HOTP) one-time passwords using a shared secret.
What happens if I enter an invalid secret key?
The tool will likely fail to generate a valid code or return an error, as the shared secret is required to produce a functioning one-time password.
Is there a limit on how many codes I can generate?
The material does not specify any generation limits, but as a free web tool, usage may be subject to the site's general terms of service.
Do I need to install any software to use this OTP generator?
No installation is required; the tool runs entirely within the web browser on the IT Tools website.
Keep Exploring

Similar tools

Based on shared tags

Text to Binary6 options

Converting plain text into binary code is essential for understanding how computers process and store information at the most fundamental level. This converter translates letters, numbers, and symbols into their binary equivalents using standard character encodings. By providing a clean interface for rapid translation, it eliminates the need for manual calculations or memorizing complex bit patterns for every character. Students, developers, and hobbyists frequently use this utility to debug data streams, study computer science fundamentals, or create encoded messages for specific digital applications. It serves as a practical educational resource for visualizing how human-readable language transforms into machine-readable data. The process handles various character sets and ensures that the output is accurately formatted for further use in programming or technical documentation. Whether analyzing network packets or exploring the digital representation of language, users can rely on these results for consistency and precision.

6 options🔢 Number Theory & Sequences

Percentage Calculator6 options

Calculating percentages manually often leads to errors or unnecessary complexity in daily tasks. The Percentage Calculator simplifies these operations by providing a versatile interface for various mathematical requirements. Users can quickly determine what percent one number is of another, find the value of a specific percentage, or calculate the total value when only a portion and its percentage are known. It serves students, professionals, and anyone needing fast, reliable results for common arithmetic problems. Beyond basic calculations, the utility handles more complex scenarios such as percentage increases, decreases, and the difference between two specific values. This makes it particularly valuable for financial analysis, tracking changes in data sets, or comparing values in retail and scientific contexts. By automating the underlying formulas, the calculator ensures accuracy while saving time, allowing users to focus on interpreting their results rather than performing manual calculations.

6 options➗ Fractions, Percentages & Ratios

Case converter5 options

Converts typed text between various formatting styles, including lowercase, uppercase, title case, and sentence case. Users input any string of characters into the provided field and select the desired output casing from a list of options. The tool automatically processes the selection to standardize the text format instantly. This utility is ideal for anyone needing to ensure consistent textual presentation across different platforms or documents. It helps writers, developers, students, and content creators quickly adjust formatting to meet readability standards or technical requirements. Using this converter simplifies the process of maintaining professional and uniform text appearance with minimal effort.

5 options📝 Text & Encoding

Regex Tester5 options

Tests regular expressions using a pattern library and provides explanations for matches. Users can input text and regex patterns to see if there are any matches, with detailed explanations for each match found. Developers and IT professionals looking to test and debug regex patterns would find this tool useful. It allows them to quickly verify if their regular expressions are working as expected, saving time on manual testing.

5 options🛡️ Security

YAML to JSON Converter3 options

Seamlessly bridging the gap between two of the most popular data serialization formats, the YAML to JSON Converter provides a reliable way to transform configuration files and data structures. Developers and system administrators frequently use this utility when migrating settings between environments or preparing data for APIs that require strict JSON formatting. It handles the nuances of both formats, ensuring that complex hierarchies and nested objects remain intact during the translation process. The utility offers bidirectional functionality, allowing users to switch between YAML and JSON as their project requirements evolve. It includes comprehensive support for YAML-specific features such as comments and anchors, which are often lost in basic conversion scripts. By automating the transformation, the converter helps maintain data integrity and saves time when working with Kubernetes manifests, CI/CD pipelines, or web application configurations.

3 options🔄 Data Format Converters

HTTP Status Codes2 options

Provides a detailed reference of HTTP status codes, allowing users to search and understand various HTTP response statuses. It serves as an invaluable resource for developers by offering clear explanations of each code's meaning and typical use cases. Useful for web developers, API creators, and anyone involved in backend systems who need to troubleshoot issues or ensure their applications are compliant with HTTP standards.

2 options💻 Developer Tools