Base64 Encoder/Decoder

How to use

1. 1. Enter or paste your data in the input area above
2. 2. Adjust settings or options as needed
3. 3. Click the action button or see real-time results
4. 4. Copy the result with the copy button

All processing happens in your browser. Nothing is sent to any server.

About this tool

Base64 is a binary-to-text encoding scheme that represents binary data using 64 ASCII characters. Our Base64 Encoder/Decoder converts text to Base64 and back instantly, with support for file uploads, URL-safe Base64 variants, and automatic image preview for Base64-encoded images. Base64 encoding is essential for embedding images in HTML/CSS via data URIs, sending binary data through JSON APIs, encoding email attachments (MIME), and working with HTTP Basic Authentication headers. The tool supports standard Base64 and URL-safe Base64 (replacing + with - and / with _), which is used in JWTs and URL parameters. Upload any file to get its Base64 representation, or paste a Base64 string to decode it back. All encoding and decoding happens in your browser using the Web Crypto API — your data never leaves your device.

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