Encrypt & decrypt

Client

Encrypt, decrypt, hash, or convert UTF-8 ↔ Base64 with common ciphers. Use the center column for passphrase (when applicable) and the buttons to move data between panels—same flow as a classic three-column crypto UI.

Workspace

Pick a cipher or digest. Symmetric modes use the passphrase in the center; MD5 and Hash are one-way.

?

Uses crypto-js in your tab. No requests to our servers. Passphrase is optional but empty secrets are weak—use only for testing.

MD5 is legacy; prefer SHA-256 for integrity checks.

Passphrase

Optional; empty uses an empty secret (weak).

Common use cases

  • Test symmetric cipher output quickly before wiring encryption into app code.
  • Generate hash digests for quick checksum checks in development workflows.
  • Convert text between UTF-8 and Base64 when debugging token payload pipelines.

Common mistakes to avoid

  • Treating weak hashes as secure password storage

    Fast hashes like MD5 or SHA-1 are not suitable for password storage. Use dedicated password hashing in backend systems.

  • Losing track of cipher mode and key assumptions

    Cipher results depend on algorithm details and key material; make sure both sides use matching settings.

  • Using the same secret everywhere

    Reuse increases blast radius. Isolate secrets by environment and rotate when exposure is suspected.

FAQ

Is this tool suitable for production-grade key management?

No. It is primarily for utility and debugging workflows. Production systems need managed key lifecycles and server-side controls.

Can I compare hashes from other systems here?

Yes. Use the hash tab to reproduce digest values and check whether your input normalization matches the source system.

Does encryption run in my browser?

Yes. This workspace performs supported crypto operations locally in your browser tab.

More tools

Related utilities you can open in another tab—mostly client-side.