Encryption Playground

The Encryption Playground lets you experiment with symmetric and asymmetric encryption algorithms directly in your browser using the Web Crypto API. It supports AES-GCM (authenticated encryption, recommended for most use cases), AES-CBC (classic block cipher mode), and RSA-OAEP (asymmetric encryption for key exchange and small payloads).

On the AES tab you can generate random 128-bit or 256-bit keys, encrypt plaintext, and see the resulting ciphertext encoded as Base64. The initialization vector (IV) is automatically generated for each encryption operation and prepended to the ciphertext, so you can decrypt by simply pasting the combined output back along with the same key. AES-GCM is recommended because it provides both confidentiality and integrity — if the ciphertext is tampered with, decryption will fail rather than silently producing garbage.

On the RSA tab you can generate 2048-bit or 4096-bit RSA-OAEP key pairs, encrypt small messages with the public key, and decrypt them with the private key. RSA is not designed for encrypting large amounts of data; instead it is typically used to encrypt a symmetric key which then encrypts the actual payload. The tool shows the PEM-formatted public and private keys so you can study their structure.

Every operation displays a step-by-step log that explains what is happening under the hood — key generation, IV creation, encryption, encoding — making this a useful educational tool for developers learning about cryptography. If you need to hash data rather than encrypt it, try the Hash Generator. For simple text obfuscation you can use the Text Encrypt / Decrypt tool, and for encoding binary data as text the Base64 encoder is the standard choice.

All cryptographic operations run entirely client-side. No keys, plaintext, or ciphertext are ever transmitted to any server.

1. Select the AES or RSA tab depending on which algorithm you want to experiment with.
2. For AES: choose a mode (AES-GCM recommended) and key size (128 or 256 bit), then click Generate Key to create a random key.
3. Enter your plaintext in the text area and click Encrypt. The ciphertext (Base64, with IV prepended) and the IV appear below.
4. To decrypt, paste the ciphertext and key into the Decrypt section and click Decrypt. The original plaintext is recovered.
5. For RSA: select a key size (2048 or 4096 bit) and click Generate Key Pair. The public and private keys are displayed in PEM format.
6. Enter plaintext (limited by key size) and click Encrypt to encrypt with the public key. Paste the ciphertext into the Decrypt section and click Decrypt to recover the message with the private key.
7. Watch the Operation Log at the bottom to see each step of the cryptographic process as it happens.