Text Encrypt & Decrypt
Encrypt or decrypt text locally using AES-GCM and a passphrase.
Guided walkthrough
Guided walkthrough
Understand a text encryption round trip.
- For a classroom demonstration, use the fictitious text demo note and the educational passphrase public demonstration only. Never use that passphrase for real secrets.
- Read the explanation before running the tool yourself. This walkthrough does not load an example or start an inspection.
Illustrative example
Encrypt, then paste the complete OCD1 payload into decrypt mode and enter the same educational passphrase. The original demo note should return.
How to read the result
The complete OCD1 value includes the data needed for decryption, but not the passphrase. Fresh salt and IV make repeated encryption differ. Keep the full payload unchanged; a lost passphrase is unrecoverable through this tool.
This is a static educational walkthrough. It does not fill fields, generate values, inspect your browser, or read storage. Use fictitious, non-secret data for practice. Never share passwords, keys, tokens, or cookie values. These explanations are not a security audit or certification.
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Only the tool’s public link is shared. Your inputs and results stay here.
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Quick answer
Encrypt or decrypt text in the browser with AES-GCM and a passphrase. Keep the passphrase: without it, this page cannot recover the encrypted text.
The page and its assets load from the site; this operation uses your entered values only in this browser and does not send them to a calculation endpoint.
How to use it
Enter text and a passphrase to encrypt or decrypt with AES-GCM. A random salt and IV are used with PBKDF2-SHA-256; losing the passphrase makes encrypted text unrecoverable.
Limits
If you lose the passphrase, this page cannot recover the encrypted text. Keep a separate backup of important data and verify a test before relying on it.
Frequently asked questions
What happens if I forget the passphrase?
The encrypted text cannot be recovered by this tool without the same passphrase and the required encrypted data. Keep a separate backup.
Does AES-GCM detect modified ciphertext?
AES-GCM is an authenticated encryption mode; decryption fails if the authentication check does not pass.
How do I decrypt an encrypted result?
Paste the complete value beginning with OCD1: and use the exact same passphrase. If you change the passphrase, decryption will fail.
Should I test the result before relying on it?
Yes. Encrypt and decrypt a non-sensitive sample, save the complete output, and confirm it can be opened before protecting important text.
Sources and references
These references document the cited standard or browser API; they do not validate the tool’s output.