Text Encryptor
Encrypt and decrypt text with a passphrase using AES-256-GCM — 100% in your browser, nothing is sent or stored
About this tool
Encrypt and decrypt text with a passphrase using AES-256-GCM and PBKDF2 key derivation — everything happens in your browser, nothing is uploaded or stored Text Encryptor runs in the browser on DevTools. There is no signup, and your input stays on this device unless the tool explicitly performs a live network lookup.
What this tool does not do
- Text Encryptor is a free in-browser utility, not a hosted API. It does not keep server-side history and is not a substitute for production verification in your own stack.
How do I use this tool?
How do I use Text Encryptor?
Open Text Encryptor, enter or paste your input, and copy the result. The page works without an account.
Related guides
Encrypting Files in the Browser: AES-256-GCM Without a Server
How client-side file encryption with PBKDF2 works, why wrong passwords fail loudly, and what a .dte file format contains.
How Text Becomes Bytes: Binary, Hex, and UTF-8 Explained
What happens when you save a text file, how UTF-8 encodes characters, and why the same string can be different lengths in binary.
Caesar Ciphers, ROT13, and Why Neither Is Encryption
What a shift cipher is, why ROT13 is self-inverse and useful for light obfuscation, and how frequency analysis breaks even large keys efficiently.
How BIP39 Seed Phrases Work (and Why You Must Never Reuse One)
The entropy-to-words mapping, the checksum, and the security model that makes a 12-word phrase protect an entire cryptocurrency wallet.
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