2FA / TOTP sikkerheds- og diagnoseværktøjskasse
A dedicated diagnostic suite built for 2FA troubleshooting and security engineers. Validate & repair Base32 secrets, parse and build bidirectional otpauth:// URIs with live QR codes, and measure device clock drift with millisecond accuracy.
Base32 nøglevalidator & renser
Registrerer ugyldige tegn (0, 1, 8, 9, O, I, L), fjerner mellemrum/bindestreger, udfylder med '=' og grupperer i standard 4-tegns blokke
Ikke-kompatible tegn fundet
💡 Test den verificerede nøgle med det samme i hovedgeneratoren med øjeblikkelig 6-cifret TOTP-beregning.
🚀 Ét-klik test i 2FA-generatorotpauth:// URI-inspektør & reversbygger
Tovejs redigering: Analyser rå otpauth:// URI'er til felter, eller rediger felter for at generere rene URI'er og live QR-koder
Scan med Google Authenticator, Microsoft Authenticator eller 1Password for øjeblikkelig tilknytning
NTP-systemurafvigelsesinspektør
Netværksrundrejsemåling med flere stikprøver mod referencetid. Diagnosticerer over 90% af alle 2FA-bekræftelsesfejl.
Perfekt ursynkronisering (forsinkelse < 1s)
Dit systemur er i perfekt synkronisering med den globale netværksstandardtid. RFC 6238 30-sekunders TOTP-tokens vil generere og validere pålideligt uden tidsvinduedesynkronisering.
Vejledning til kalibrering af systemur (Løs 2FA-kodefejl)
Vælg dit operativsystem- 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.
Ofte stillede spørgsmål (FAQ)
Dybdegående tekniske svar om Base32-kodning, otpauth-standarder og urafvigelsesmekanik
Q. Hvorfor er cifrene 0, 1, 8 og 9 ugyldige i 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). Cifre 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. Hvilke parametre er inkluderet i en 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. Hvorfor forårsager en urafvigelse på 15 sekunder afvisning af token?
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. Indsamler, gemmer eller overfører denne værktøjskasse mine nøgler?
Aldrig. 2FA-Tool.com opererer under en nul-tillids, privatlivs-først forpligtelse. Al Base32-parsing, nøglerensning, omvendt URI-opbygning, QR-kodegengivelse og NTP-offsetmålinger foregår fuldstændigt inde i din browsers lokale JavaScript-hukommelse. Ingen serveruploads, ingen cookies og ingen vedvarende logs.