Encode text to Base64 or decode Base64 strings instantly. Supports UTF-8 and file encoding.
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Base64 Encoder & Decoder is a free, browser-based tool built for developers and security professionals. Encode and decode Base64 strings instantly. Supports text and file encoding. Free online Base64 tool — no signup required. This tool processes everything locally using JavaScript — no data is uploaded to any server, no account is required, and there are no usage limits. Whether you’re working on a quick project or handling sensitive data, your privacy is fully protected. Bookmark this page and use it anytime — it works on desktop, tablet, and mobile devices.
Base64 is a binary-to-text encoding scheme that converts binary data into a set of 64 ASCII characters. It's commonly used to embed images in HTML/CSS, transmit binary data in JSON/XML, and encode email attachments.
Yes. Base64 encoding increases the data size by approximately 33%. This is because every 3 bytes of binary data are represented as 4 Base64 characters.
No. Base64 is an encoding scheme, not encryption. It does not provide any security — anyone can decode Base64 data. For security, use proper encryption algorithms.