Hashing is not encryption
A hash creates a one-way digest such as SHA-256. It is useful for checksums, integrity checks, identifiers, and password verification systems when combined with proper password hashing methods.
Encryption is designed to be reversible with the correct key. AES is a symmetric encryption algorithm, while RSA is asymmetric and uses public and private keys.
Encoding is for representation, not secrecy
Base64, URL encoding, and HTML entities change how data is represented so it can travel through systems safely. They do not provide confidentiality.
Do not treat an encoded string as protected data. Anyone can decode Base64 or URL-encoded text with standard tools.
Browser tools need careful data handling
Browser-based cryptography can be useful for learning, test data, and local workflows. Still, production security design should follow reviewed libraries, threat models, and organizational policy.
Never paste real private keys, production secrets, recovery phrases, or customer data into a tool unless you fully understand where the data is processed and stored.
Practical checklist
- Use hashes for integrity checks, not encryption.
- Use encoding for transport and display, not secrecy.
- Keep private keys and production secrets out of casual tools.
- Use password safety checks for guidance, not as a full audit.
- Document algorithms and key handling in real systems.