AES-GCM encrypt / decrypt
Encrypt locally with a passphrase, random salt and IV; authenticated AES-256-GCM.
How it works & limits
How to use this tool
Encrypt locally with a passphrase, random salt and IV; authenticated AES-256-GCM.
Enter your content or open a file, then select Run.
Example input
Hello, developer. 你好，开发者。
Local processing
Your input stays in this browser. Drafts are kept in page memory while switching tools, and disappear on reload.
Text is limited to 1 million characters. Regex runs in a worker, capped at 200,000 characters, 1,000 matches and 1.5 seconds. Inputs above 100,000 characters use manual refresh.
The first page load and on-demand modules require network access. A complete offline cache is not included.