Base64 Encoder & Decoder
Encode and decode text to Base64 or Base64URL instantly with full UTF-8 support.
Privacy-first
Your data is processed entirely in your browser. We do not upload, store, or transmit your data to any server.
Understanding this Utility
Base64 is an encoding format that represents binary data as text using a limited set of 64 ASCII characters. It is widely used to safely transmit data across systems that only support text.
Is Base64 Encryption?
No. Base64 is an encoding scheme, not encryption. Anyone can decode a Base64 string back to its original form. It is designed for data compatibility and transmission, not for security or hiding information.
Base64 vs Base64URL
Standard Base64 uses the characters '+' and '/', which can break URLs or file paths. Base64URL replaces these with '-' and '_', and removes the trailing '=' padding, making it perfectly safe to use in web addresses and filenames.
Why UTF-8 Support Matters
Standard browser Base64 functions often fail or corrupt data when processing emojis or non-Latin characters (like Arabic or Japanese). Our tool uses robust UTF-8 encoding to ensure your text remains perfectly intact.
Common Use Cases
Base64 is commonly used for embedding small images directly into HTML/CSS (Data URIs), transmitting JSON Web Tokens (JWT), and handling basic HTTP authentication headers.