Base64 Encoder / Decoder

• Base64 encoding: Converts text or binary data (such as images or files) into a plain text string made of 64 safe characters. It is mainly used to safely embed and transmit data in text-only environments such as web pages and emails.
• Base64 decoding: The reverse process of encoding, which converts a Base64 string back into its original image, file, or readable text format.

Yes. The tool uses UTF-8 encoding/decoding and supports multiple languages as well as emoji characters.

Base64 converts every 3 bytes of data into 4 printable characters, which typically increases the data size by about 33%. This is a normal characteristic of Base64 encoding.

Yes. The tool supports both standard Base64 and URL Safe Base64 formats, where '-' and '_' are used instead of '+' and '/'.

No. Base64 is only an encoding method, not an encryption algorithm. Anyone can easily decode Base64 back to its original content. For secure data protection, dedicated encryption algorithms should be used.

Common reasons include:

• The input is not a valid Base64 string.
• The data is truncated or incomplete.
• The string contains invalid characters or is corrupted.

Please ensure the input data is complete and correctly formatted.

• Embedding images in Data URLs or sending email attachments.
• Exchanging data via JSON APIs.
• Transmitting tokens.
• Sending binary data through text-only systems.

No. All encoding and decoding processes are performed locally in your browser.