OTPClient

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

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