Base64 Encoder and Decoder

Base64 Encoder Decoder Online

Our base64 encoder decoder online tool turns plain text into Base64 and Base64 back into readable text in one click. Paste your input, choose Encode or Decode, and the result appears instantly. There is nothing to install and no sign-up, and everything runs directly in your browser.

Base64 Encode Decode Free, No Limits

This base64 encode decode free tool has no account, no watermark, no daily limit and no locked features. You can convert as many strings as you like and use the results in personal or commercial projects. Because the work happens in your browser, your text is not uploaded to any server.

Base64 Converter Online for Developers and Beginners

As a base64 converter online, this page suits developers who debug API responses, email headers or data URIs, and beginners who just want to understand what a Base64 string means. The output is standard Base64, so it works with JavaScript, Python, PHP, Java and any other language. If you are building a new project, you can also create a matching site icon with our Favicon Generator.

Encode and Decode Base64: How to Use It

You can encode and decode Base64 in a few quick steps:

1. Paste your text or Base64 string into the input box.
2. Select Encode to convert text to Base64, or Decode to convert Base64 back to text.
3. Check the result in the output box.
4. Press Copy and paste the result into your code, config file or message.
5. Press Clear to start again with new input.

Base64 String Encoder Decoder

A reliable base64 string encoder decoder should return exactly what you expect. Here is a simple example of the conversion:

Text:    Hello
Base64:  SGVsbG8=

Base64 strings are made of letters, numbers, + and /, and may end with one or two = padding characters. If a string contains other characters or has the wrong length, decoding will fail, which usually means the input is incomplete or was copied incorrectly.

What Is Base64 Used For?

Base64 represents binary data using only safe text characters. It is commonly used to embed small images in HTML and CSS, send attachments in email, store data in JSON, and pass values in URLs and HTTP headers. It is an encoding method, not encryption, so anyone can decode a Base64 string. For real security, create strong credentials with our Random Password Generator instead of relying on Base64 to hide information.

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Need other helpers for your project? Try the QR Code Generator for links and flyers, the UUID Generator for unique identifiers, or the Color Palette Generator to build a matching set of colors for your design.

Tips for working with Base64

• Never treat Base64 as a way to protect passwords or private data.
• Expect the encoded result to be about one third larger than the original.
• Remove extra spaces and line breaks before decoding if a string fails.
• Use URL-safe Base64 (with - and _) when the value goes inside a web address.

Frequently asked questions

Is this base64 encoder decoder really free? Yes. It is free, requires no registration, and has no usage limits.

Is my data uploaded anywhere? No. Your text stays in your browser and is not sent to a server.

Is Base64 the same as encryption? No. Base64 only changes how data is represented. Anyone can reverse it, so it does not protect sensitive information.

Why does my Base64 string end with an equals sign? The = is padding that makes the encoded length a multiple of four characters.