Base64 Encoder / Decoder

About Base64

Base64 is a text-safe encoding scheme that transforms binary or UTF-8 content into ASCII characters. It is widely used when raw bytes need to move through systems that only safely support text, such as JSON payloads, email bodies, HTML attributes, and legacy network protocols.

This tool handles UTF-8 correctly using the browser TextEncoder and TextDecoder APIs, which means emoji, accented characters, and multilingual text will not break during encoding or decoding. URL-safe Base64 is also supported for web tokens and query-string use cases.

How To Use This Tool

• Choose Encode to convert text into Base64, or Decode to turn Base64 back into UTF-8 text.
• Type or paste content into the left textarea and review the result instantly on the right.
• Enable URL-safe Base64 when you need - and _ variants instead of + and /.
• Drag in a small local file to generate a Base64 Data URI for inline usage.
• Copy or download the result when you are ready to reuse it elsewhere.

Common Use Cases

• Embedding small images or SVGs directly into HTML or CSS as Data URIs.
• Generating Basic Auth credentials and other protocol-safe encoded strings.
• Transporting binary data across text-based systems, logs, or API payloads.
• Inspecting Base64 values from tokens, integrations, or encoded configuration files.