Base64 Decode
Decode Base64 to text.
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Tool guide
Base64 Decode: how it works
Practical information to understand the result and use this tool correctly.
About Base64 Decode
Base64 decoding reverses the encoding step: a 64-character alphabet is mapped back to the original bytes or text. Developers use it for tokens, email attachments, and data URLs.
This tool decodes locally in your browser. If the input is not valid Base64, you should see an error instead of corrupted output.
Decoding is not decryption. Anyone with the string can recover the original data—do not rely on Base64 to hide secrets.
How to use it
- 1Paste the Base64 string.
- 2Decode to readable text.
- 3Copy the result into your editor or API client.
Frequently asked questions
- Why do I get an error?
- Common causes: missing padding (=), line breaks, or characters outside the Base64 alphabet. Clean the string and try again.
- Can it decode images?
- If the payload is binary, you may see garbled text. For images, use a data-URL or a dedicated image decoder.