Base64 Decoder
Decode Base64 or Base64URL back into readable UTF-8 text. Invalid input and binary data are detected and explained.
This tool runs entirely in your browser.
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How to use the Base64 Decoder
- 1Paste Base64 text.
- 2The decoded text appears instantly.
- 3Copy the result.
What is the Base64 Decoder?
Both standard Base64 and URL-safe Base64URL are accepted, with or without padding, and whitespace is ignored.
Frequently asked questions
Why do I get an error about UTF-8?
The data is binary (for example an image or a ZIP file), not text. Use Base64 to Image for images.
Is the Base64 Decoder free and private?
Yes. The Base64 Decoder is free, needs no account, and runs entirely in your browser. What you type is never sent to a server or stored.