Paste a Base64 string to decode it back into readable text — entirely in your browser.
About Base64 decoding
This tool takes a Base64-encoded string and converts it back to its original, readable text — the reverse of Base64 encoding. All decoding happens locally in your browser.
FAQ
Why does it say "invalid input"? The text you pasted isn't valid Base64 — check for missing characters, extra spaces, or line breaks that shouldn't be there.
Need to go the other way? Use the Base64 Encoder.