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Base64 Encoder / Decoder
Convert text to Base64 encoding and back with our developer-friendly Base64 Encoder / Decoder tool. Supports standard Base64 (RFC 4648) and URL-safe Base64 variants. Features live on-the-fly conversion mode, character counting, clipboard integration, and one-click input/output swapping for seamless data handling.
encoding conversion text
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How It Works
Paste your raw string into the text area to immediately view the Base64-encoded string. Switch to 'Decode' mode to unwrap encoded Base64 back into readable text. Select 'URL-safe' mode to strip special symbols and output web-friendly strings.
Frequently Asked Questions
What is Base64 encoding? ▾
Base64 is a widespread binary-to-text encoding scheme that represents binary data using 64 ASCII characters (A-Z, a-z, 0-9, +, /). It's primarily used for safely encoding data in URLs, sending email attachments, and embedding data URIs in CSS and HTML.
What is URL-safe Base64? ▾
URL-safe Base64 replaces the plus `+` and slash `/` characters with a minus `-` and underscore `_`, and commonly removes the trailing `=` padding. This adaptation guarantees the encoded string is safe to use directly inside URL routes or query parameters without requiring further percent-encoding.
Is this Base64 tool safe to use with sensitive data? ▾
Yes. All Base64 encoding and decoding operations happen locally inside your browser using JavaScript. Absolutely no text or data is transmitted to or stored on external servers.