Base64 Decode
Decode Base64 strings back to plain text.
About Base64 Decode
Decode Base64 strings back to readable text when debugging APIs, email attachments metadata, or config values. This decoder helps you inspect opaque strings without writing a one-off script.
How to use this tool
- Paste a Base64 string into the input.
- Run decode to reveal the plain text.
- Copy the result into your notes or debugger.
- Switch to Base64 Encode if you need the opposite direction.
What you get
- Instant Base64 → text decoding
- Useful for auth and payload debugging
- Free browser workspace
Common use cases
- Inspect encoded header values
- Reveal demo token contents during support
- Check whether a string is valid Base64
Frequently asked questions
What if decode fails?
The string may be truncated, URL-safe Base64, or not Base64 at all. Check padding and alphabet.
Is decoding private?
Decoding is designed to run in your browser for normal use.
Is it free?
Yes. Free online Base64 decode on CodeForge Tools.