Decrypt Text Online
Decrypt versioned AES-GCM envelopes automatically, with explicit compatibility modes for older values.
Use this decrypt online tool to unlock text encrypted with Encrypt Online's versioned AES-GCM envelope. Older AES-256-CBC and 3DES values remain supported through explicit legacy compatibility selections.
- Leave auto-detect selected for an EOE1 envelope.
- For an older unprefixed value, select AES-256-CBC or 3DES legacy compatibility.
- Paste the encrypted text on the left.
- Enter the original passphrase.
- Click "Decrypt" to view the output on the right.
- If an error appears, confirm the algorithm and passphrase match.
Use the Encrypt Tool with the same passphrase. New values use AES-GCM by default.
This tool supports Encrypt Online v1 AES-256-GCM envelopes plus legacy CryptoJS AES-256-CBC and 3DES values. OpenPGP armored messages use the separate OpenPGP Message workflow.
Use the Base64 Decode tool when you need decoding without decryption.
What do I need to decrypt a value?
Use the same passphrase. A versioned EOE1 envelope identifies its AES-GCM settings automatically; older values also require the matching legacy method.
Why does decryption fail?
Most failures come from a changed value, an incorrect passphrase, or the wrong method for an older unprefixed value.
Does this tool store my data?
Use the Privacy and Security pages for site-level data handling and tool limitations.