Base64 Encoder & Decoder Online
Encode text to Base64 or decode Base64 back to text — instantly in your browser.
Runs in browser
Base64
Runs in your browser
Privacy: Your text stays on your device. Encoding and decoding run entirely in your browser.
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How it works
Step 1
Paste text
Enter plain text or Base64.
Step 2
Encode or decode
Choose the transformation.
Step 3
Copy
Copy the result with one click.
About this tool
Convert between plain text and Base64 without sending data to a server. Useful for debugging payloads, data URLs, and encoding tasks.
FAQ
Why did decode fail?+−
Base64 must use a valid alphabet and padding. Extra spaces are ignored, but truncated strings will error.