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Crypto tool

AES Encrypt/Decrypt

Test browser-based AES encryption workflows carefully while reviewing keys, IVs, metadata and sensitive data limits.

Tool Workspace

Processing is intended to run locally in your browser whenever possible. Avoid pasting production secrets, access tokens, private keys or sensitive business data into any online tool unless you fully understand the risk.

Ready. Processing runs in your browser.

Core Features

  • Support AES workflow examples.
  • Explain key, IV and mode requirements.
  • Warn about production secret handling.
  • Keep encryption notes close to the tool area.

How to Use

  1. Use non-sensitive sample text when learning the workflow.
  2. Provide or generate the required key and IV values.
  3. Encrypt or decrypt only when you understand the data format.
  4. Review the security notes before using results outside a test context.

Common Errors

  • Reusing an IV with the same key.
  • Confusing passwords with cryptographic keys.
  • Losing required metadata needed for decryption.
  • Pasting production secrets into online tools.

Real Developer Use Cases

  • Learning Web Crypto API data flow.
  • Testing local encryption examples with sample data.
  • Documenting AES-GCM payload structure for developers.

Technical Explanation

AES is a symmetric encryption algorithm, which means encryption and decryption depend on a secret key and correct metadata such as an initialization vector. Browser-based examples are useful for learning, but production encryption requires careful key management, authenticated modes, safe randomness and strict handling of sensitive data.

FAQ

Is my input uploaded to your server?

Tool input is processed in the browser for these utilities unless a page explicitly states otherwise.

Can I use this with production secrets?

Do not paste production passwords, private keys, access tokens or sensitive business data into any online tool unless you fully understand the risk.

Why does this page include explanations below the tool?

Developer Data Tools is designed to help users understand the data problem, not just transform input and output.

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