What is the Base64 Encode/Decode?
The Base64 Encoder and Decoder converts text into Base64 and back again. Base64 represents data using only letters, numbers and a few symbols, which makes it safe to place inside emails, URLs, JSON files and HTML. This tool supports Unicode text, so names and messages in languages such as Sinhala or Tamil, and even emoji, are encoded correctly.
How to use the Base64 Encode/Decode
- Paste the text you want to convert into the box.
- Click Encode to turn plain text into Base64, or Decode to turn Base64 back into text.
- If decoding fails, check that the Base64 string is complete and has no extra characters.
- Click Copy to take the result with you.
Benefits and use cases
- Developers working with API tokens, data URLs and email attachments.
- Students learning how binary-to-text encoding works.
- Testers checking what is hidden inside an encoded string.
- Anyone who needs to move text safely through systems that only accept simple characters.
Tips for best results
Base64 makes data about one third larger, so avoid it for big files when size matters. If you decode a string and see unreadable symbols, the original data may be binary such as an image rather than text. For URLs, remember that a URL-safe variant exists that replaces plus and slash characters, and this tool uses the standard version.
ToolZen tools run in your browser, so your input is not uploaded to a server. Bookmark this page and come back whenever you need it. There is nothing to install and no account to create.
Frequently asked questions
Is Base64 a form of encryption?
No. Anyone can decode it, so never use it to protect passwords or private data.
Why does my decode fail?
The input may be incomplete, contain unwanted characters, or may not be valid Base64.
Does it support non-English text?
Yes. Text is handled as UTF-8, so international characters work.
Is my text uploaded?
No. Encoding and decoding happen in your browser.