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Base64 Decode
Runs in your browserInput
Output
Ready — zero server calls
How to Use
- Paste a Base64-encoded string into the input field.
- Click Decode to convert it back to plain text.
- Copy the decoded output.
Decode Base64 Strings
Base64 decoding converts Base64-encoded text back to its original form. If you've received a Base64 string from an API response, email header, or JWT token, paste it here to see the decoded content.
About Base64 Decoding
This decoder handles standard Base64 (RFC 4648) and Base64URL (used in JWTs and URLs). It properly decodes UTF-8 encoded content, so international characters and emoji will display correctly. For binary data, the decoded output is shown as text â if the original data was binary (like an image), you'll see raw bytes.