Free private security check-up
AltF Security
Leak check by k-anonymity, link checks and a habits check-up, without sending passwords or pasted code.
- Password leak check
- Phishing link checker
- Website security headers
- Personal security checkup
For privacy first
If privacy matters most, these AltFTool workspaces do their work in your browser: AltF Security (password leak check uses a 5-character hash prefix, never the password), AltF Authenticator (the secret stays in memory), AltF Minutes, AltF IdeaLab, AltF Flow and AltF Vault (encrypted with AES-256 on your device, no account and no upload; not yet independently audited).
Workspaces that do their work on your device, so your input is not sent to a server.
6 picks, in order
Ordered by how often this audience needs them. Every workspace is free and needs no account.
Free private security check-up
Leak check by k-anonymity, link checks and a habits check-up, without sending passwords or pasted code.
TOTP 2FA code generator
TOTP codes generated locally; the shared secret is held in memory only.
Meetings into decisions
Transcript processing stays in your browser.
Validate before you build
Your idea and its score stay on your device.
Local workflow automation
Workflows execute entirely in your browser.
Browser-only encrypted vault
Passwords, notes and recovery codes encrypted in your browser; nothing is uploaded.
Go straight to a tool
FAQ
AltF Security hashes the password on your device and sends only the first five characters of the hash, then compares the matching list locally.
It encrypts everything in your browser with AES-256-GCM and a key derived from your passphrase, and stores nothing on AltFTool's servers. It has not been independently audited yet, and sync, sharing and extensions stay gated until it is.
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