Base64 Decoder | A free, easy online tool

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Base64 to decode

Decoded Text

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How it Works

Base64 decoding converts Base64 encoded strings back into their original text or binary format. This tool instantly decodes Base64 strings as you type.

Features

Instant decoding: Results update as you type
Error handling: Clear feedback for invalid Base64 input
Switch to encoder: Easily switch to encoding mode
Copy functionality: One-click copy of decoded text

Common Use Cases

Decoding Base64 data from APIs
Reading encoded email attachments
Extracting data from data URIs
Debugging encoded authentication tokens
Converting Base64 images back to viewable format

Examples

"SGVsbG8gV29ybGQ=" → "Hello World"
"dG9vb2xzLmFwcA==" → "toools.app"
"IUAjJCU=" → "!@#$%"

Tips

Valid Base64 strings contain only A-Z, a-z, 0-9, +, /, and = for padding
The "=" character at the end is padding
Base64 strings are typically longer than the original text
Use the switch button to encode the decoded result

Decoding Tools

URL Format Decoder - Transform text from a URL into readable characters.
HTML Entity Decoder - Decode HTML entities back to readable text characters.
JWT Decoder - Decode any JSON Web Token to inspect its header, payload, and expiry — entirely in your browser.