AltF Vault

Encrypted secure notes

Keep private text such as ID numbers, alarm codes, bank details or a will location as encrypted secure notes. Each note is sealed with AES-256-GCM in your browser and stored only on this device, so AltFTool never sees it. Open the vault below and choose Add, then Secure note.

  • Free, no account
  • Encrypted on your device
  • Works offline
  • Not yet independently audited
Checking this browser for a saved vault...

Good things to keep in a secure note

  • Passport, PAN, Aadhaar or national ID numbers and expiry dates.
  • Bank account and IFSC details, locker numbers and branch contacts.
  • Door, alarm and safe codes.
  • Where your will, insurance papers and property documents are kept.
  • Answers to security questions (better: random answers you store here).

Notes are not searchable by content, on purpose

Search covers titles and tags only. That keeps sensitive text off the screen while you look for something. Give each note a clear title and a tag such as documents or banking.

Encrypted secure notes: questions and answers

Are my notes uploaded anywhere?

No. They are encrypted in the page and saved in this browser only. Use the encrypted backup to keep a copy elsewhere.

How long can a note be?

Up to 20,000 characters each, with line breaks kept.

Can I attach files or photos?

Not in the vault. For files, use the Encrypted Local File Vault tool linked on this page, which encrypts files on your device.

Can I share a note?

There is no sharing feature, because it would need a server. Copy the text and send it through an end-to-end encrypted messenger if you must.

Vault guides and features

AltF Vault homeThe vault, how it is built, what it cannot do and the FAQ.How the encryption worksThe full AltF Vault security design in plain English: PBKDF2-SHA-256 key derivation, AES-256-GCM, what is stored, and what it cannot protect against.2FA recovery code storageStore two-factor backup and recovery codes encrypted on your device, tick off used codes and get warned when a set is running low. Free, no account.Password health checkFind weak, reused and years-old passwords in your vault, plus expired API keys and low recovery codes. Checked on your device, breach check optional.Encrypted backup and restoreDownload an encrypted backup of your AltF Vault, keep it in cloud storage or on a USB drive, and restore it on any device with your passphrase.Import passwords from CSVImport a password CSV from Chrome, Edge, Firefox, Safari, Bitwarden, 1Password or LastPass into an encrypted vault. Read on your device, never uploaded.Offline password managerA free offline password manager that runs in your browser with no account or cloud. Encrypted on your device, works without internet after loading.Master passphrase guideHow to choose a master password for a password manager: random word passphrases, how many words you need, how to memorise it and what to avoid.How to choose a password managerA checklist for choosing a password manager: audits, encryption, recovery, sync, offline access, export and cost, with an honest look at where AltF Vault fits.

Free tools that work with the vault

AltFTool stores nothing from your vault. It is encrypted and kept in your browser; the only optional network request is the k-anonymity breach check.