Base64 Encode / Decode

What the Base64 Encode / Decode tool does

Base64 is a way of writing any text or binary data using only plain ASCII letters, numbers and a couple of symbols, so it survives being copied into places that choke on special characters: JSON payloads, data URIs, email headers, config files and HTTP basic auth strings. This tool does both directions. Paste readable text and get its Base64 form, or paste a Base64 string and read the original back. It is handy for developers debugging an API response, anyone decoding a token to see what is inside, or pasting a Base64 image string back into something legible.

Encoding is full UTF-8 safe, so emoji, accented letters and non-Latin scripts come through correctly instead of breaking.

How to use it

1. Type or paste your content into the Input box.
2. Pick a Mode from the dropdown: choose Encode to turn text into Base64, or Decode to turn Base64 back into text.
3. The Output box updates live as you type, so there is no button to press for the result.
4. Hit Copy to grab the output, then paste it wherever you need it.

If you switch to Decode and the string is not valid Base64, you will see a clear “Invalid Base64 input” message instead of garbled output.

Why use it here

It is quick because the conversion happens the instant you type. It is private: the encoding and decoding run entirely in your browser using the built in functions, so nothing is sent anywhere and your tokens or text never touch a server. It is free, needs no account, and works the same on a phone, tablet or laptop.

Tips

Base64 is encoding, not encryption. Anyone can decode it, so never treat it as a way to hide passwords or secrets. If your decoded text looks wrong, check for stray spaces or line breaks in the input, since those are a common cause of failed decodes.