About this utility
How to use AES-256-GCM Encrypt & Decrypt
Encrypt text with a random WebCrypto key or authenticate and decrypt this tool’s JSON package.
What to provide
Choose encrypt for plaintext or decrypt for a package created by this tool.
- Paste, type, or drag and drop a supported text file into the input area.
- Choose the options that match your intended result.
- Select “Run tool” or press Ctrl/Command + Enter, then copy, download, or move the result back into the first input for another pass.
What the result means
Produces a bounded, inspectable aes-256-gcm encrypt & decrypt result locally.
Privacy and safety
This utility is loaded as browser code and processes your input only in this tab. OmniCastConverter has no upload endpoint and never stores your content, filenames, tokens, or secrets. Generated markup and code are shown as inert text and are never executed.
Limitations
- The generated key is not stored or recoverable; production key management remains the user’s responsibility.
Try the included example
Select “Load example” at any time to restore this tested sample.
Private local note