a2fa ("annoying two-factor authentication") is a command line tool for generating and validating one-time password.
Publisher’s description
What is a2fa?
a2fa by csyezheng is open-source Windows software in the password managers category. It is written in Go.
Installation and requirements
The publisher provides Portable installers for 64-bit Windows. It runs without installation (portable).
Updates and version history
The current version is 0.16.5, released on November 15, 2023. The version history goes back to November 6, 2023: 2 releases, all linked to the official files. The last update is more than a year old.
Popularity and file types
The source code on GitHub (csyezheng/a2fa) has 129 stars. Similar programs include Bitwarden, KeePassXC and Yubico Authenticator.
Project description on GitHub: “a2fa is a command line tool for generating and validating one-time password. Its purpose is to get rid of phones and be able to authenticate easily. ”
Pros / Cons
Pros
- Open source: the code can be inspected and built by anyone
- Portable: runs without installation
Cons
- No native ARM64 build
- No update for more than a year
In short: a2fa is an open-source password manager tool for 64-bit PCs. Updates have slowed down.
Is a2fa safe to download?
- The file is served by github.com, the publisher’s own domain
- The download link uses HTTPS
- A SHA256 hash is published, so you can verify the file:
EC2028BA556F1B86077531C56104260EB1065347F77E7725FBDCDC2660978563· Open the VirusTotal report for this hash - The link has not been checked yet
- The source code is public
- ExeAtlas does not host, wrap or modify installers
Related guide: How to check a file’s SHA256 hash on Windows
Recent versions
All 2 versions ›| Version | Date | Size | Files |
|---|---|---|---|
| 0.16.5Latest | November 15, 2023 | — | 64-bit ZIP |
| 0.16.2 | November 6, 2023 | — | 64-bit ZIP |
Install from the command line
Silent install ›winget install --id csyezheng.a2fa -eRelated guide: How to use winget: install and update apps
Information
- Publisher
- csyezheng
- Category
- Password managers
- Licence
- Apache License 2.0
- Price
- Free
- Source code
- github.com/csyezheng/a2fa
- Written in
- Go
- Requires
- Windows 11 / 10
- Architecture
- 64-bit
- Installer
- Portable
- Version
- 0.16.5
- Released
- November 15, 2023
- Added to the catalogue
- November 6, 2023
- Versions listed
- 2
- GitHub stars
- 129
- GitHub forks
- 19
- winget ID
- csyezheng.a2fa
Ratings and reviews
No reviews yet. Be the first to rate it.
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Frequently asked questions
Is a2fa free?
Yes. a2fa is open-source software under the Apache License 2.0 licence.
Is a2fa safe to download?
The download comes from github.com, which belongs to the publisher; ExeAtlas does not host or change the file. Compare its SHA256 hash with the one shown here, or open the VirusTotal report for that hash.
How do I install a2fa with winget?
Open PowerShell or Windows Terminal and run the winget command shown on this page. winget downloads the official installer and checks its SHA256 hash before running it.
Does a2fa run on ARM (Windows on Arm)?
There is no ARM64 build; Windows 11 on Arm can run the 64-bit version through emulation.
Where can I download an older version of a2fa?
The versions page lists all 2 versions with links to their official installer files, back to November 6, 2023.
Can I use a2fa without administrator rights?
Yes, it is portable: unpack and run it.
What are alternatives to a2fa?
Bitwarden, KeePassXC, Yubico Authenticator, KeeWeb and Ente Auth. The alternatives page compares them.
