Base64 Decoder
Convert a Base64 string into readable UTF-8 text entirely in the browser.
Decode Base64 text as UTF-8. Base64 is an encoding format, not encryption.
Input and output stay in this browser. Do not use Base64 as a substitute for encryption or access control.
🔒 All processing happens in your browser — files never leave your device. Your input stays in this browser and is not uploaded to Smart Online Tools.
How it works
- Paste Base64 text.
- Select Decode Base64.
- Copy the decoded result.
Good to know: Binary data that is not valid UTF-8 text cannot be shown in this text decoder. Base64 does not encrypt the original content.
Privacy and processing
All processing happens in your browser — files never leave your device. Your input stays in this browser and is not uploaded to Smart Online Tools.
Decode Base64 text
The decoder converts Base64 bytes back to UTF-8 text. It is useful for inspecting text payloads and encoded snippets during development.
If a value represents an image, compressed file, or other arbitrary bytes, it may not be valid UTF-8. This text tool reports an error instead of displaying corrupted characters. Base64 itself is not encryption.
Frequently asked questions
What does Base64 Decoder do?
Decode Base64 text back into UTF-8 characters. Convert a Base64 string into readable UTF-8 text entirely in the browser.
Does this tool upload my files or input?
Your input stays in this browser and is not uploaded to Smart Online Tools.
What should I know before using this tool?
Binary data that is not valid UTF-8 text cannot be shown in this text decoder. Base64 does not encrypt the original content.