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Free, Private, Browser-Based Encryption
SimpleTextEncryption.com is a collection of free cryptography tools that run entirely in your browser. Your data never leaves your device. No accounts, no tracking, no servers.
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100% Local Processing
All cryptographic operations use your browser's built-in WebCrypto API. Nothing is sent to any server.
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No Tracking
No analytics, no cookies, no user accounts. We don't know who you are or what you encrypt.
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Free Forever
All tools are completely free to use, with no limits, no sign-ups, and no paid tiers.
Why Encrypt Text?
Encryption is the process of converting readable data into an unreadable form that can only be reversed with the correct key or passphrase. It protects sensitive information when stored or transmitted — so even if someone intercepts or finds your data, they cannot read it.
Common reasons to encrypt text include protecting personal notes, securing messages before sending over unencrypted channels (SMS, email), safeguarding API keys and passwords in configuration files, and storing sensitive information in shared documents or databases.
Is my data safe when I use this site?
Yes. All encryption, decryption, and hashing runs entirely in your browser using the Web Crypto API. Your text never leaves your device and is never sent to our servers (we don't even have servers that process user data).
Can I use this offline?
Once the page loads, all tools function offline. The encryption itself has no network dependency — save the HTML file to use it anywhere, even without internet.
What's the difference between encryption and hashing?
Encryption is reversible — you can decrypt it back to the original with the correct key. Hashing is one-way — it produces a fixed fingerprint that cannot be reversed. Use encryption when you need to retrieve the original text; use hashing to verify integrity or store passwords.
Which encryption algorithm should I use?
Both AES-256-GCM and ChaCha20-Poly1305 are excellent choices. AES-256-GCM is the industry standard with hardware acceleration. ChaCha20-Poly1305 is preferred for software-only environments and is used in TLS 1.3. For most users, AES-256-GCM is the recommended default.
What happens if I lose my passphrase?
There is no recovery mechanism. Modern encryption is designed so that without the correct passphrase, data cannot be decrypted — that's what makes it secure. Always store your passphrase in a password manager.