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Base64 Encoder & Decoder

Encode text to Base64 or decode Base64 back to plain text instantly with our free online tool. Essential for developers, data transfer, and working with APIs.

Base64 Encoder & DecoderInputHello, World!ResultSGVsbG8sIFdvcmxkIQ==
base64 encode showing example with input "Hello, World!" and result "SGVsbG8sIFdvcmxkIQ=="

Base64 Encoder / Decoder

Convert text to and from Base64 encoding

How to Use This Base64 Encode

  1. 1Paste your plain text into the input field to encode it to Base64.
  2. 2Or paste Base64-encoded text to decode it back to plain text.
  3. 3Click the 'Encode' or 'Decode' button to perform the conversion.
  4. 4Copy the result to your clipboard with one click.

What Is a Base64 Encode?

Base64 is a binary-to-text encoding scheme that represents binary data in an ASCII string format. It is commonly used when there is a need to encode binary data that needs to be stored and transferred over media that are designed to deal with text. Base64 is used extensively in email via MIME, in URLs, in XML and JSON data, and for embedding images directly into HTML and CSS. The encoding process converts every three bytes of binary data into four ASCII characters, resulting in a text string that is approximately 33% larger than the original binary data.

Tips for Using This Base64 Encode

Use Base64 encoding when you need to embed binary data like images directly into HTML or CSS files. Many APIs require Base64-encoded data for file uploads and authentication tokens. When decoding Base64, ensure the string is valid — corrupted Base64 strings will produce garbled output. Base64 is not encryption; it is merely encoding. Do not use it to secure sensitive data. For URL-safe Base64, replace + with - and / with _, and remove padding = characters.

About This Tool

Base64 encoding was first described in 1987 and has become one of the most widely used data encoding schemes on the internet. It solves a fundamental problem: how to transmit binary data through systems that only handle text. From embedding tiny images directly in HTML emails to encoding JSON Web Tokens for authentication, Base64 is everywhere in modern web development. Our encoder and decoder makes it easy for developers, system administrators, and curious users to work with Base64 without needing command-line tools or programming knowledge. The tool performs all operations locally in your browser, ensuring your sensitive data never leaves your device.

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Frequently Asked Questions About Base64 Encode

Yes, our Base64 encoder and decoder is completely free with unlimited usage and no signup required.
Base64 is used to encode binary data as text for transmission over text-based protocols, embedding images in HTML/CSS, encoding API tokens, and storing binary data in JSON or XML.
No, Base64 is encoding, not encryption. Anyone can decode Base64 instantly. Never use it to protect sensitive information.
Base64 uses 4 ASCII characters to represent 3 bytes of data, resulting in approximately 33% larger output than the original binary data.
This tool encodes text to Base64. For image encoding, you would first convert the image to a text representation or use a dedicated image-to-Base64 tool.
URL-safe Base64 replaces the + and / characters with - and _ respectively, and removes = padding, making it safe to use in URLs without encoding.
Yes, our Base64 encoder and decoder works perfectly on smartphones, tablets, and desktop computers.
Yes, all encoding and decoding happens in your browser. Your data is never sent to our servers.