Base64 Decoder
Decode Base64 to text instantly. Free, no signup, runs in your browser.
How It Works
Paste a Base64-encoded string into the input field and click Decode. The decoded plain text appears instantly below. Use the Copy button to copy it to your clipboard.
Everything runs in your browser. No server receives your data — decoding is done using JavaScript on your device.
What Is Base64 Decoding?
Base64 decoding is the reverse of Base64 encoding — it converts a Base64-encoded ASCII string back into its original binary or text form. This is useful when you receive data that has been encoded for safe transmission through text-based protocols.
Common use cases include decoding email attachments, extracting embedded images from HTML or CSS, reading API tokens, and inspecting data payloads in URLs.