Encode or decode Base64 text
Base64 Converter turns UTF-8 text into Base64 and converts valid Base64 back into readable text. It is useful when a text value must travel through a system that expects a limited set of ASCII characters.
How to use the converter
Choose a direction
Select Encode to create Base64 or Decode to recover the original text.
Enter the value
Paste plain text when encoding, or a Base64 string when decoding. The result updates in the output field.
Copy the output
Review the result, then copy or download it. Swap moves a valid result into the input and changes the conversion direction.
Base64 is not encryption. Base64 changes how data is represented; it does not add secrecy. Anyone can decode the value, so do not use it to protect passwords, tokens, or other sensitive information.
Text encoding details
Plain text is read as UTF-8 before it is encoded. That means Arabic, French accents, emoji, and other Unicode text can make a round trip without being limited to basic English characters.
The decoder accepts standard Base64 text and reports invalid characters, padding, or byte sequences instead of exposing a misleading partial result. This page converts text, not uploaded images, PDFs, or other binary files.
Is Base64 the same as encryption?
No. Base64 is a reversible encoding format and provides no confidentiality or password protection.
Can Base64 encode Arabic, emoji, and accented characters?
Yes. The converter encodes text as UTF-8, so Unicode text can be encoded and decoded without first converting it to English-only characters.
Why does my Base64 string show an error?
The input may contain invalid characters, incorrect padding, or bytes that do not form valid UTF-8 text. Check that you copied the complete value and selected Decode.
Can I convert an image or PDF with this Base64 converter?
No. This tool is designed for text values. Binary files need a file-aware encoder that preserves their bytes and MIME type.
Why is Base64 longer than the original text?
Base64 represents each three bytes with four ASCII characters, so the encoded value is usually about one-third larger before formatting.
Is the text sent to a server?
No. Encoding and decoding run in your browser after the page has loaded. The current value is not included in the page URL.