Use this free online Base64 encoder and decoder to convert plain text to Base64 or decode Base64 to human-readable text. This tool is ideal for developers and programmers working with encoded data.
What is Base64?
Base64 is a binary-to-text encoding scheme used to encode binary data into ASCII strings. This format is widely used to store or transmit files over systems that handle only text.
When to Use Base64?
Base64 is useful when embedding binary data (like images) in HTML, CSS, or sending it over REST APIs where text format is expected.
How Base64 Works:
Base64 divides data into chunks of 3 bytes, converts them into 4 encoded characters. Padding (`=`) is added if necessary to ensure output is always a multiple of 4.
Examples:
"Hello" → SGVsbG8=
"Software" → U29mdHdhcmU=
Security Note:
Base64 is not encryption. It is simply an encoding format. Never store sensitive information encoded in Base64 without encryption.
Use Cases:
✅ Email attachments
✅ HTML/CSS embedded images
✅ API payloads
✅ Safe data transport in URLs