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Software · Security & privacy

OTPClient

Application for managing TOTP/HOTP tokens with built-in encryption.

  • Completely free
  • Linux
  • Open source
  • No account

Overview

OTPClient is a two-factor authentication program, available on Linux.

Overview written by LicitPro from the documentation published by the authors and the cited sources; we have not tried the resource ourselves.

Excerpts that establish this information
  • “Application for managing TOTP/HOTP tokens with built-in encryption” — Flathub, 10 November 2026
  • “A GTK4/libadwaita application for managing TOTP and HOTP two-factor authentication tokens in encrypted local databases, with a CLI and desktop-search integration.” — GitHub, 10 November 2026

At a glance

All of OTPClient is free: no feature is locked behind a paid plan, and its code is open.

Its licence (GPL-3.0+) is a copyleft open source licence: you may use, study, modify and redistribute it, including commercially; modified versions must keep the same licence.

Strengths

  • Open source code
  • No account needed
  • Commercial use allowed

About

OTPClient is a secure and easy-to-use desktop client for TOTP and HOTP one-time passwords, built with GTK4 and libadwaita. Features: multiple databases with sidebar management and cross-database search token grouping with quick filtering, group-wide rename and removal, and multi-select actions review and repair of tokens that failed validation, and a preview before every import desktop search provider for GNOME Shell and KDE KRunner (opt-in trigger keyword) command-line companion (otpclient-cli) with scriptable table/JSON/CSV output support for TOTP, HOTP, and Steam codes configurable digits (4 to 10), period (1 to 120 seconds), and algorithm (SHA1, SHA256, SHA512) import and export of encrypted/plain Aegis backups import and export of encrypted/plain Authenticator Pro and 2FAS backups import and export of plain FreeOTP+ backups (key URI format) import of Google Authenticator migration QR codes (file, webcam, clipboard) integration with the OS secret service provider via libsecret (opt-in) local database encrypted with AES-256-GCM and Argon2id key derivation; plaintext lives only in libgcrypt secure memory while unlocked

Description from Flathub — AppStream (Flathub)

Sources and checks

  • Facts collected from GitHub (credit card, account, source code, publisher, licence, free status, platforms, commercial use) —
  • Facts collected from Flathub (credit card, publisher, licence, free status, platforms, commercial use, version) —
  • Last technical check: 6 November 2026
  • Description from Flathub — AppStream (Flathub)

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