Instant encode
Switch between encode and decode actions with one click.
Browser-onlySecure and local
Base64 Encoder
Convert readable text to Base64 or decode Base64 strings instantly. No upload, no account, no server processing.
Local text handling
Text conversion runs in the browser.
Copy-ready output
Result text is prepared for pasting into apps, APIs, or docs.
About the Base64 Encoder
Base64 represents any text or binary data using only 64 safe characters (A–Z, a–z, 0–9, + and /). It is used wherever data must pass through systems that expect plain text: email attachments, data URLs, HTTP headers, and many APIs.
This tool encodes text to Base64 and decodes Base64 back to text, including non-English characters and emoji. Everything runs in your browser with JavaScript. Nothing you type is uploaded to our server, so it is safe to use with private data.
How to use it
- Paste the text or Base64 string into the input box.
- Choose Encode or Decode.
- Copy the result with Copy Result.
Common uses
- Reading the contents of a Base64 value found in a log or configuration file.
- Preparing a value for a Basic Authorization header.
- Testing how an API encodes payloads.
Tips
- Base64 is an encoding, not encryption: anyone can decode it, so never use it to hide secrets.
- Encoded output is about one third larger than the input.
- If decoding fails, check for missing padding (= at the end) or characters copied from a URL-safe variant (- and _).