Base64 Encoder & Decoder
Instantly convert plain text into Base64 format, or decode it back to readable text.
About the Base64 Converter
The OnlinePaste.com Base64 Converter is a fast, free, and secure developer tool that lets you seamlessly translate text into Base64 formatting and back again. Our tool correctly handles special characters, emojis, and Unicode strings that often break standard converters.
What is Base64?
Base64 is an encoding algorithm that transforms any data (like text or binary images) into a safe, readable string using an alphabet of 64 characters (A-Z, a-z, 0-9, +, and /). It is heavily used in web development for passing data in URLs, embedding small images in CSS/HTML files, and transferring data safely across networks that might corrupt raw binary data.
Is Base64 Secure?
No. Base64 is encoding, not encryption. Anyone with a decoder tool (like this one) can easily translate the Base64 string back into readable text. You should never use Base64 to hide passwords or sensitive information.
However, your data is completely private while using this tool. All encoding and decoding happens locally in your browser via JavaScript. Your text is never transmitted to or saved on our servers.