Need to encode or decode Base64 strings? Our free online Base64 encoder/decoder instantly converts text and binary data to Base64 format and back, making it ideal for data transmission and debugging.
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Tip
Embed small icons as Base64 in CSS to save HTTP requests and improve initial page load speed.
Did You Know?
Base64 encoding increases data size by about 33% compared to the original binary source.
Base64 is a binary-to-text encoding scheme that represents binary data in an ASCII string format by translating it into a radix-64 representation. Its primary role is to ensure that data remains intact during transport through systems that may not support binary data, such as email via MIME or data embedded within XML and JSON files. While it increases the overall data size, it is essential for maintaining compatibility across diverse network protocols and storage systems in modern software development.
Best Practice
Never store passwords or sensitive secrets using only Base64; it provides zero security or obfuscation.
Q: Is Base64 a form of encryption? A: No, Base64 is an encoding format. It is used to transform data for compatibility, not to hide information, and can be easily reversed by anyone.
Q: Why does the encoded string look longer than the original? A: Base64 encoding typically increases the data size by about 33% because it uses four 6-bit characters to represent every three 8-bit bytes of data.
Q: Can I use this tool to encode images? A: Yes, you can paste the binary representation of an image to receive a Base64 string suitable for use in HTML Data URIs.
Q: What characters are used in Base64? A: Standard Base64 uses a set of 64 characters: A-Z, a-z, 0-9, and the symbols '+' and '/', often with '=' used for padding.
Did You Know?
The '=' character in Base64 is used as padding to ensure the final string length is a multiple of four.