Instantly encode text to Base64 or decode Base64 strings back to plain text — all in your browser, completely private.
Base64 is an encoding scheme used to convert binary data into an ASCII string format. It's universally used for embedding images in CSS, transmitting data in JSON APIs, and securing basic HTTP authentication. Our Base64 Encoder & Decoder is a bidirectional tool that lets you seamlessly convert text to Base64 format and decode Base64 strings back to readable text.
Security and privacy are guaranteed, as all encoding and decoding operations happen entirely in your browser. No data is ever transmitted to a server.
Base64 is used to encode binary data (images, files, certificates) into ASCII text so it can be safely transmitted in text-based protocols like email (MIME), HTTP headers, JSON APIs, and HTML data URLs.
No. Base64 is an encoding scheme, not encryption. It transforms data into a different representation but provides zero security. Anyone can decode Base64 instantly.
Yes, because the conversion happens entirely on your device using JavaScript. Your data is never sent to our servers.
Standard Base64 uses + and / characters which are not URL-safe. Base64url replaces + with - and / with _, making it safe to use in URLs and filenames without percent-encoding. JWTs use Base64url encoding.
All processing happens locally in your browser. We never see, store, or transmit your data. This tool is fully client-side and secure.
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