Base64 Encode/Decode
Convert text to Base64 and vice versa with ease. Features real-time processing and expansion ratio analytics. All computations are performed locally for maximum privacy.
Processed output will appear here...
About Base64 Encode & Decode (Text)
Base64 encoding converts binary data into ASCII text using a set of 64 characters (A–Z, a–z, 0–9, plus two symbols). It is commonly used to embed binary data in JSON, XML, or URLs, and for basic obfuscation (not encryption). This utility encodes and decodes text in the browser with no server round-trips.
Typical uses: Encode credentials or tokens for HTTP Basic Auth headers. Embed small data payloads in JSON or config without binary blobs. Decode API responses or webhooks that return Base64. Test encoding/decoding in development or documentation. Sanitize or inspect Base64 strings before sending them to backend services.
How it works: Enter plain text to get Base64, or paste Base64 to get the original text. Encoding increases size by about 33%; the tool can show the expansion ratio so you know the overhead. Decoding validates the input and reports errors if the string is not valid Base64. All processing happens in your browser—your text is never sent elsewhere.
Notes: Base64 is not encryption; anyone can decode it. Do not use it to protect secrets. For URLs, consider URL-safe Base64 variants if your system requires them. For large files, use a dedicated file-based encoder; this page is optimized for text and short strings.