2FA / TOTP Dijagnostički i sigurnosni alati
Specijalizirani dijagnostički paket za rješavanje 2FA problema i sigurnosne inženjere. Provjerite i popravite Base32 ključeve, analizirajte i izgradite dvosmjerne otpauth:// URI-je uz QR kodove u stvarnom vremenu i izmjerite pomak sata s preciznošću u milisekundama.
Base32 Key Validator & Cleaner
Detecta caràcters no vàlids (0, 1, 8, 9, O, I, L), elimina espais/guions, afegeix farciment amb '=' i agrupa en blocs estàndard de 4 caràcters
Otkriveni neusklađeni znakovi
💡 Proveu immediatament la clau verificada al generador principal amb càlcul instantani de TOTP de 6 dígits.
🚀 Testiraj u 2FA generatoruotpauth:// URI Inspector & Reverse Builder
Edició bidireccional: analitzeu URIs otpauth:// en camps individuals o editeu els camps per generar URIs nets i codis QR en directe
Scan with Google Authenticator, Microsoft Authenticator, or 1Password to bind instantly
NTP System Clock Drift Inspector
Mjerenje mrežnog kašnjenja u odnosu na atomski referentni sat. Dijagnosticira više od 90% pogrešaka pri 2FA provjeri.
Savršena sinkronizacija sata (pomak < 1s)
Your device system clock is in perfect synchronization with global network standard time. RFC 6238 30-second TOTP tokens will generate and authenticate reliably without window desynchronization.
Vodič za kalibraciju sistemskog sata (Rješavanje 2FA grešaka)
Odaberite svoj operativni sustav- Press Win + I to open Windows Settings.
- Select Time & language from the sidebar, then click Date & time.
- Ensure that Set time automatically and Set time zone automatically are both toggled ON.
- Under Additional settings, click the Sync now button until a green checkmark appears.
- CLI Command (Admin): Run
w32tm /resyncin PowerShell or CMD.
- Click the Apple menu in the top-left corner and open System Settings.
- Navigate to General in the sidebar, then click Date & Time.
- Ensure Set time and date automatically is enabled.
- Keep the default reference server set to
time.apple.com. - Terminal Command: Open Terminal and run
sudo sntp -sS time.apple.com.
- Open the Settings app on your iPhone or iPad.
- Tap General, then select Date & Time.
- Ensure Set Automatically is toggled ON.
- 💡 Pro Tip: If it was already on but drift persists, toggle it OFF for 5 seconds, then toggle it ON again to force an immediate base station re-sync.
- Open your phone's Settings and tap System > Date & time.
- Enable Use network-provided time and Use network-provided time zone.
- ⭐ Google Authenticator built-in sync: Open Google Authenticator > Tap the 3 dots menu > Settings > Time correction for codes > Tap Sync now.
Frequently Asked Questions (FAQ)
In-depth technical answers on Base32 encoding, otpauth standards, and clock drift mechanics
Q. Why are digits 0, 1, 8, and 9 invalid in Base32?
Under RFC 4648, standard Base32 represents 5 bits of data per character, requiring exactly 32 distinct symbols: uppercase A-Z (26 letters) and digits 2-7 (6 numbers). Digits 0, 1, 8, and 9 simply do not exist in the alphabet. Furthermore, 0 is easily confused with letter O, and 1 is easily confused with I or L. Our auto-fix utility restores accidentally confused characters automatically.
Q. What parameters are included in an otpauth:// URI?
The otpauth:// specification originated with Google Authenticator and has become an RFC-aligned open standard. Key parameters include: secret (Base32 shared key), issuer (provider name, e.g. GitHub or Google), algorithm (HMAC hash function, default SHA1), digits (code length, default 6), and period (time step window, default 30s).
Q. Why does a clock drift of 15 seconds cause token rejection?
TOTP computes dynamic codes strictly via T = Math.floor(UnixTimestamp / 30). While most authentication servers provide a ±1 interval window tolerance, when your local device clock is off by 15-20 seconds, your code enters the adjacent time interval 15 seconds prematurely, triggering frequent validation rejections near interval boundaries.
Q. Does this toolbox collect, store, or transmit my keys?
Never. 2FA-Tool.com operates under a zero-trust, privacy-first commitment. All Base32 parsing, key cleaning, URI reverse building, QR code rendering, and NTP offset measurements happen completely inside your browser's local JavaScript memory. No server uploads, no cookies, and no persistent logs.