ToolBirch

Text Encrypt / Decrypt

AES-256-GCM authenticated encryption in your browser.Security & Privacy

Text Encrypt / Decrypt

AES-256-GCM authenticated encryption with PBKDF2 key derivation (150,000 iterations) and a random salt and IV per message. The standard algorithms — nothing invented here.

Everything runs locally; the password and text never leave the tab.

There is no recovery: a lost password means the data is gone.

About this tool

Real authenticated encryption: AES-256-GCM with a PBKDF2-derived key (150,000 iterations), a fresh random salt and IV per message. Wrong passwords fail loudly — GCM rejects tampered data.

How to use the Text Encrypt / Decrypt tool

  1. Enter text and password. Nothing leaves the tab.
  2. Encrypt. The output is a versioned payload containing salt, IV and ciphertext.
  3. Decrypt later. Paste the payload back with the same password.

Supported formats

Input

  • Plain text or file input

Output

  • Converted or analysed output

Inputs are validated before anything is processed. Invalid values and unsupported files are rejected with a clear error instead of failing silently.

Frequently asked questions

Can I decrypt without the password?

No. PBKDF2 makes guessing expensive and GCM fails closed.

Why the version prefix?

It versions the format so future changes can stay backwards-aware.

What if I forget the password?

The data is unrecoverable — that is the point of the design.

Privacy

Everything you enter stays in this browser tab. There is no upload endpoint for tool inputs, no account, and no server-side copy of your text or files. Results are produced locally and disappear when you close the page.

No account is required and no file is ever uploaded. See the privacy policy for details about analytics and the limited data this site stores.

Known limitations

  • Output is only compatible with this tool; it is not an OpenPGP or Fernet format.

Related tools

Other free tools from the same collection.

Password Strength CheckerEstimate password strength from entropy and weak patterns.File Checksum CalculatorSHA digests of a file to verify downloads.File Hash ComparatorCompare two files byte-for-byte via SHA-256.HMAC GeneratorKeyed message authentication with WebCrypto HMAC.