Lock files and folders, keep an encrypted password vault, run a timed lockdown and get alerted about intruders — all in one portable Windows app with no installer, no account and no cloud.
Windows 10 / 11 · 64-bit · single portable .exe · v5.0.0 · last updated 2026-10-24
Add files or folders and ATLOCK seals them in an encrypted container (chunked AES-256-GCM). Guarded items cannot be opened, moved or deleted by anyone using your PC. For strong protection, give a File Guard item its own password.
A faster way to protect items without typing a password each time. It is protected by Windows DPAPI and the vault gate, so treat it as convenience protection — use File Guard with a password for sensitive data.
Store credentials in a vault encrypted with a key derived from your master password using Argon2id. Nothing syncs to a server. A password-health report flags weak, reused, old and breached passwords.
Start a timed lockdown screen to lock your PC for a set duration — useful for studying, focus and parental control. Ending it early needs your real vault master password.
Add TOTP authenticator codes, optional FIDO2 hardware keys such as a YubiKey, and Windows Hello (face, fingerprint or PIN) to the vault.
A panic password opens a decoy vault instead of your real one and logs the event, so a forced unlock does not reveal your real data.
Quick and full scans, a startup-entry check, optional VirusTotal file lookups using your own free API key, ransomware canary decoy files, and an emergency network-disconnect button.
Failed unlock attempts are recorded in a notification panel. If you have a webcam, intruder photos are saved to your own Pictures folder.
| Version | 5.0.0 (current public release) |
|---|---|
| Platform | Windows 10 / 11, 64-bit |
| Install | None — single portable .exe, no admin rights |
| Price | Free |
| Encryption | AES-256-GCM, Argon2id key derivation |
| Account / cloud | None. Optional online checks only run when you press them |
Honest note: ATLOCK is a pure application-layer tool. A determined attacker who can already run code as your Windows user can tamper with any user-level software, so use a strong master password and pair ATLOCK with BitLocker for full-disk protection.
Your vault, settings and guarded files stay on your machine, under a local .atlock_data folder restricted to your Windows user.
No analytics, no sign-up, no cloud sync. Optional online checks (breach lookup, VirusTotal) happen only when you use them.
Run it from any folder. Delete the folder and it is gone — nothing is written to the registry by an installer.
| Windows default | ATLOCK | |
|---|---|---|
| Locking files | Basic permissions only | Encrypted File Guard containers |
| Password storage | Browser or cloud account | Offline AES-256 vault, Argon2id |
| Timed PC lock | Screen lock, no timer | System Lockdown with no early bypass |
| Install | Built in / Store | Portable .exe, no installer |
Yes. ATLOCK is free to download and use, with no trial period and no account.
Open the File Guard panel, add the folder, and ATLOCK seals it. For strong protection give the item its own password. You can remove the guard from the same panel.
Yes. The vault is encrypted on your device with a key derived from your master password using Argon2id and never leaves your machine. The optional breach check sends only a short hash prefix, and only when you run it.
No. ATLOCK is an application-layer tool and does not use a kernel driver. For full-disk protection, BitLocker is the right tool; ATLOCK adds file-level protection, a vault and lockdown on top.
There is no cloud recovery. A queued reset can complete after 24 hours, but encrypted vault data stays protected, so keep your password safe.
No. A webcam is only used for intruder photos. File Guard, Lockdown and the Vault work without one.
ATLOCK is a new, unsigned indie app. Click More info, then Run anyway. The release page and source are public on GitHub.