Generate and verify time-based one-time passwords for 2FA debugging
TOTP (RFC 6238) is the algorithm behind authenticator apps like Google Authenticator, Authy, and 1Password. It combines a shared secret key with the current time to generate a short-lived numeric code that changes every 30 seconds. This tool lets developers generate and verify TOTP codes for debugging 2FA implementations, testing authenticator integrations, and validating secret keys. It supports SHA-1 (standard), SHA-256, and SHA-512 algorithms with configurable digit counts and time periods — all running entirely in your browser.
The TOTP Generator is a free, browser-based security utility on ipaddress.world that helps you get the job done in seconds without installing anything or creating an account. Generates time-based one-time codes from a shared secret (RFC 6238). It's designed for everyday use by professionals and hobbyists alike, and it runs entirely on the page you're reading now — so your data stays on your device.
Whether you reach for it a dozen times a day or only when something breaks, TOTP Generator is built to be fast, reliable and refreshingly simple. There are no ads inside the tool area, no sign-up walls, no usage counters and no surprise limits. You paste or drop your input, adjust a few options if needed, and get a clean result you can copy, download or share.
There are plenty of tools on the internet that claim to do the same thing. What makes TOTP Generator different is the combination of three things: privacy, speed and focus. Privacy, because the heavy lifting happens in your browser using modern web standards — nothing gets uploaded, logged or profiled. Speed, because there's no round-trip to a remote server, so results come back as fast as your CPU can produce them. And focus, because the interface strips away everything that isn't helping you finish the task.
It's the kind of tool you bookmark once and rely on for years. No installs, no updates to babysit, no licence keys to renew — just open the page and go.
Developers debugging 2FA integrations and users who want to inspect their authenticator secrets. In practice, the audience is wide: anyone who needs a dependable, no-nonsense security utility that works the first time and doesn't get in the way. Teams at startups and enterprises use it during incident response, code reviews, customer support and content production. Freelancers and students use it to avoid paying for heavyweight desktop apps they only need occasionally. Power users keep it open in a pinned tab alongside their IDE, terminal and design tools.
That's really all there is to it. Most people are in and out within a minute, and the workflow becomes muscle memory after the first couple of uses.
Privacy is not an afterthought on ipaddress.world. TOTP Generator is built so that whatever you paste, drop or type stays with you. There is no upload step for the data you're working with, no server-side storage, no analytics inside the tool panel that would watch what you do. When you close the tab, everything is gone. This matters when you're handling code, configuration, tokens, internal documents, client assets or personal files — exactly the things you should never be pasting into random online tools.
Bookmark this page so you can get back to it instantly. If you use TOTP Generator often, keep it open in a pinned browser tab — it loads in a fraction of a second and stays ready. Try the keyboard: most actions have sensible defaults so you can press Enter instead of clicking. And don't forget to scroll down to the Related Tools section below — ipaddress.world has dozens of tools that complement each other, and chaining two or three together often solves problems that would otherwise need a custom script.
Is this safe for real secrets?
Yes — generation and calculations run locally in your browser and nothing is transmitted.
Do you store anything I enter?
No. Inputs and outputs are discarded the moment you close the tab.
Which algorithms are used?
Wherever possible, the tool uses the built-in Web Crypto API, which implements standard, audited primitives.
Is it free?
Yes, completely free with no account required.
If you spot something that could be better, or you'd like to see a feature added to TOTP Generator, we'd love to hear about it. ipaddress.world is maintained as a long-term project, and feedback from real users is what shapes each tool over time. Thanks for using it — and happy building.