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AES Encrypt Guide

Learn when to use AES Encrypt, how to use it correctly, and how to avoid common mistakes.

What this guide covers

Use this AES Encrypt tool to encrypt plain text with AES and return Base64 ciphertext. It is useful for demos, browser-side encryption tests, reversible development workflows, and understanding how passphrase-based AES transforms readable input into encrypted output.

This guide explains when to use AES Encrypt, how to get a cleaner result, and which mistakes to avoid before moving on to related tools or the main tool page.

Why use AES Encrypt

How to use AES Encrypt

  1. Enter the passphrase on the first line
  2. Paste the plaintext below it
  3. Click Run Tool to encrypt the text
  4. Review the Base64 ciphertext output
  5. Use AES Decrypt with the same passphrase to reverse it

Best use cases

Common mistakes

The user forgets to add a passphrase

Fix: Put the passphrase on the first line and the plaintext below it.

The wrong passphrase is used later during decryption

Fix: You must use the exact same passphrase to decrypt the ciphertext.

The input format is reversed

Fix: Always put the passphrase first and the plaintext below it.

The user expects hex output instead of Base64

Fix: This tool returns Base64 ciphertext for easier copy and reuse.

The user expects key-file or IV controls

Fix: This page is a simple passphrase-based AES tool, not an advanced crypto console.

Use the tool

Ready to run AES Encrypt? Open the main tool page to enter your input, generate the result, and copy or download the output.

Open AES Encrypt