Developer Tools
Find clear answers to common questions about AES Decrypt, including usage, output, and common issues.
Use this AES Decrypt tool to reverse AES-encrypted Base64 text using the original passphrase. It is useful for browser-side decryption tests, reversible development workflows, encrypted sample validation, and confirming that AES-encrypted values can be decoded back into readable text correctly.
AES Decrypt is built for development, debugging, formatting, and quick technical checks directly in the browser.
It decrypts AES Base64 ciphertext back into readable text.
Yes. The exact same passphrase is required.
Use the Base64 ciphertext produced by the matching AES encrypt flow.
The most common reasons are the wrong passphrase or invalid ciphertext format.
The reverse tool is AES Encrypt.
AES Decrypt is built for development, debugging, formatting, and quick technical checks directly in the browser.
Start by checking the input format, removing accidental spaces or unsupported characters, and comparing your input against the example pattern on the page.
Fix: Use the exact same passphrase that was used during encryption.
Fix: Paste valid Base64 ciphertext produced by the matching AES encrypt workflow.
Fix: Put the passphrase first and the ciphertext below it.
Fix: This usually means the passphrase or ciphertext format is wrong.
Fix: Use the matching decrypt tool for the actual cipher.
If you want to see realistic input and output patterns, open the examples page. If you want step-by-step usage guidance, open the guide page.
Open the main AES Decrypt page to test your own input and generate a live result.