RSA Online Key Generator and Encryption/Decryption Tool
Online RSA key generation, encryption, and decryption tool. Generate 512–4096-bit key pairs locally and export them in 7 formats: PKCS#8/SPKI, PKCS#1, OpenSS......
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Online JWT Parser / Generator / Verifier
Online JWT tool: parse, generate, and verify Tokens on one page. Parsing automatically splits Header, Payload, and Signature and formats the JSON, recognizes......
Use NowRSA Key Format Converter
RSA key format converter: paste or drop existing public/private keys to automatically detect their type and format. Convert between PEM, DER, PKCS#1, PKCS#8,......
Use NowAES Online Encryption and Decryption Tool
Online AES encryption and decryption tool with AES-256-GCM as the default. Simple mode only requires content and a password with automatic key derivation. Ad......
Use NowDES Online Encryption and Decryption Tool
Online DES encryption and decryption tool supporting CBC, ECB, CFB, and OFB. Uses an 8-byte key and 8-byte IV with random generation, and supports Base64 or ......
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Online 3DES encryption and decryption tool supporting CBC, ECB, CFB and OFB modes. Uses 24-byte keys and 8-byte IVs with one-click random generation. Support......
Use NowOnline ChaCha20-Poly1305 Encryption and Decryption Tool
Online ChaCha20-Poly1305 encryption and decryption tool based on the IETF AEAD standard. Supports 32-byte keys, 12-byte nonce generation, additional authenti......
Use NowOnline ECC Key Generation and ECDSA Signature Verification Tool
Online ECC elliptic curve key generation and signature verification tool. Supports P-256, P-384 and P-521 curves, generates PEM formatted public and private ......
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Encryption and decryption tools provide online testing for common cryptographic algorithms. They can be used for data encryption, decryption, software development, debugging, and cryptography learning.
What Is Data Encryption?
Encryption transforms readable plaintext into ciphertext so that the original data cannot be directly understood without the appropriate key. Decryption uses the corresponding key to recover the original data.
What Is Symmetric Encryption?
Symmetric encryption uses the same secret key for encryption and decryption. AES is a widely used symmetric encryption algorithm and is suitable for processing large amounts of data. DES and 3DES are older algorithms and are generally not recommended for new systems.
What Is Asymmetric Encryption?
Asymmetric cryptography uses a related public key and private key. Depending on the algorithm and protocol, public and private keys can be used for encryption, decryption, signatures, and verification. RSA and ECC are common asymmetric cryptographic technologies.
Which Encryption Algorithms Are Supported?
- AES: A widely used symmetric encryption algorithm with multiple key sizes and operating modes.
- RSA: A classic asymmetric cryptographic algorithm commonly used for small data, key exchange, and digital signatures.
- DES: An older symmetric encryption algorithm mainly encountered in legacy systems.
- 3DES: An extended DES-based encryption scheme that is also considered legacy technology.
- ChaCha20: A modern stream cipher designed for efficient software implementations.
- ECC: A family of elliptic-curve cryptographic techniques used for public-key encryption, key exchange, and digital signatures.
What Is the Difference Between Symmetric and Asymmetric Encryption?
Symmetric encryption uses the same secret key for encryption and decryption and is generally faster. Asymmetric cryptography uses public and private keys and is commonly used for key exchange, authentication, and digital signatures. Modern systems often combine both approaches.
Are Online Encryption Tools Safe?
Online encryption tools are suitable for test data, sample data, and development debugging. Do not submit real passwords, private keys, API keys, authentication tokens, or other sensitive information to online services.