Base64 Encoder & Decoder
Encode text to Base64 or decode it back — with full Unicode support, free and private.
The Base64 Encoder & Decoder converts any text into Base64 and back again, handling Unicode characters such as Urdu, Arabic and emoji correctly via UTF-8 encoding. It is handy for encoding tokens and credentials for HTTP headers, embedding small payloads in URLs or configs, and inspecting encoded strings you receive from APIs. Everything runs locally in your browser.
How to use the Base64 Encoder & Decoder
- Type or paste your text into the box — or paste a Base64 string you want to decode.
- Click Encode to convert text to Base64, or Decode to convert Base64 back to readable text.
- Use Copy Result to copy the output to your clipboard, or Clear to reset the tool.
Base64 Encoder & Decoder — FAQs
Is the Base64 encoder free?
Yes, completely free with no signup and no usage limits. Encode and decode as much text as you need, any time, right from this page — the tool runs entirely in your browser with no queues or throttling.
Does it handle Urdu, Arabic or emoji characters?
Yes. The tool encodes text as UTF-8 before converting to Base64, so non-English scripts and emoji round-trip correctly. Many simple encoders break on Unicode characters, but this one uses the browser's TextEncoder and TextDecoder APIs for correctness.
Is my text sent to a server?
No. Encoding and decoding run entirely in your browser with JavaScript. Nothing you type is uploaded, logged or stored anywhere, so you can safely process authentication tokens and other sensitive strings with confidence every single day.
Why does decoding fail with an error?
Decoding fails when the input is not valid Base64 — usually because of missing padding characters, stray whitespace or non-Base64 characters in the string. Double-check that the pasted text is complete and unmodified, then try decoding again.