---
name: "otpclient"
section: "1"
platform: "linux"
package: "otpclient"
version: "4.0.2-1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/otpclient"
---

# otpclient(1)

Simple GTK+ software to generate OTPs (TOTP and HOTP)

## NAME

**OTPClient** - Simple GTK+ software to generate OTPs (TOTP and HOTP)

## SYNOPSIS

```
otpclient [OPTIONS]
```

## DESCRIPTION

**OTPClient is GTK+ software for two-factor authentication that supports both Time-based One-time Passwords (TOTP) and HMAC-Based One-Time Passwords (HOTP).**

**OTPClient have the following features:**

- •

  **Support both TOTP and HOTP.**

- •

  **Support setting custom digits (between 4 and 10 inclusive).**

- •

  **Support setting a custom period (between 10 and 120 seconds inclusive).**

- •

  **Support SHA1, SHA256 and SHA512 algorithms.**

- •

  **Support for Steam codes.**

- •

  **Import encrypted Authenticator Plus backup.**

- •

  **Import and export encrypted and/or plain andOTP backup.**

- •

  **Import and export plain FreeOTPPlus backup (key URI format only).**

- •

  **Import and export plain Aegis backup (plain json only).**

- •

  **Local database is encrypted using AES256-GCM.**

  - •

    **Key is derived using PBKDF2 with SHA512 and 100k iterations.**

  - •

    **Decrypted file is never saved (and hopefully never swapped) to disk. While the app is running, the decrypted content resides in a "secure memory" buffer allocated by Gcrypt.**

## OPTIONS

**Help Options:**

- **-h, --help**

  **Show help options.**

- **--help-all**

  **Show all help options.**

- **--help-gapplication**

  **Show GApplication options.**

- **--help-gtk**

  **Show GTK+ Options.**

**Application Options:**

- **--display=DISPLAY**

  **X display to use.**

## NOTES

**For other information and tutorials, see:**

- •

  **https://github.com/paolostivanin/OTPClient/wiki**

## AUTHOR

**OTPClient was written by Paolo Stivanin.**

**This manual page was written by Francisco Vilmar Cardoso Ruviaro for the Debian project (but may be used by others).**