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For privacy first

Private AltFTool tools that run in your browser

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

Best AltFTool products for privacy first

Ordered by how often this audience needs them. Every workspace is free and needs no account.

  1. Working

    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
    Runs in your browserOpen
  2. Working

    TOTP 2FA code generator

    AltF Authenticator

    TOTP codes generated locally; the shared secret is held in memory only.

    • RFC 6238 TOTP and RFC 4226 HOTP
    • QR and otpauth:// import
    • Setup QR and secret generator
    • Code verifier with clock drift
    Runs in your browserOpen
  3. Working

    Meetings into decisions

    AltF Minutes

    Transcript processing stays in your browser.

    • Summary
    • Decision log
    • Action and question extraction
    Runs in your browserOpen
  4. Working

    Validate before you build

    AltF IdeaLab

    Your idea and its score stay on your device.

    • Evidence scorecard
    • Lean canvas
    • Assumption map
    • Experiment planner
    Runs in your browserOpen
  5. Public beta

    Local workflow automation

    AltF Flow

    Workflows execute entirely in your browser.

    • Ordered actions
    • Reusable recipes
    • Execution log
    Runs in your browserOpen
  6. Public beta

    Browser-only encrypted vault

    AltF Vault

    Passwords, notes and recovery codes encrypted in your browser; nothing is uploaded.

    • AES-256-GCM in the browser
    • Vault health report
    • Encrypted backup and CSV import
    Runs in your browserOpen

Go straight to a tool

Individual tools inside these workspaces

FAQ

Questions from privacy first

How can a password leak check work without sending my password?

AltF Security hashes the password on your device and sends only the first five characters of the hash, then compares the matching list locally.

Is AltF Vault safe to use?

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.

Picks for other audiences

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