Encode text to Base64 directly in your browser. Your input is processed on your device and is not sent to our servers during encoding.
Encoding text to Base64 is straightforward. Follow these steps:
Type or paste the text you want to encode into the input area.
Click 'Encode to Base64' to convert your text. The encoded output will appear instantly in the right panel.
Copy the encoded text or click Download .txt to save it as a file.
Base64 encoding is a method of converting binary data or plain text into a string of ASCII characters that can be safely transmitted over text-based protocols. It is formally defined in RFC 4648 by the Internet Engineering Task Force (IETF). Base64 uses a set of 64 characters — uppercase letters (A-Z), lowercase letters (a-z), digits (0-9), plus (+), and forward slash (/) — along with the equals sign (=) for padding.
The encoding process works by taking every 3 bytes (24 bits) of input data and splitting them into 4 groups of 6 bits each. Each 6-bit group is then mapped to one of the 64 characters in the Base64 alphabet. This results in encoded output that is approximately 33% larger than the original input — a small trade-off for the ability to safely transmit binary data through text-only channels.
Important: Base64 is an encoding format, not encryption. It makes data text-safe for transfer or storage, but it does not protect confidential information from being read.
Base64 encoding is used extensively across the web and in software development. Here are the most common scenarios:
This Base64 Encoder processes supported input locally in your browser. For text, the tool converts characters into bytes before generating Base64 output.
No selected text is sent to our servers during encoding. Processing speed and successful output can vary depending on browser support, available memory, and the size of the input.
Base64 output is intended for text-safe representation of data. It is not encryption and should not be treated as a method for protecting passwords, private keys, access tokens, or confidential files.
This tool is intended for standard Base64 encoding of supported text. Very large text inputs can use substantial browser memory and may process slowly, fail, or make the browser unresponsive.
Base64 output is larger than the original input and is not always suitable for large text or assets embedded as data URIs. If you are creating a data URI for a website, use Base64 mainly for small assets and test the effect on page size and loading performance.
Base64 does not encrypt data, remove password protection, repair damaged files, or guarantee that encoded output is safe to share. Treat passwords, private keys, authentication tokens, and confidential files carefully.
Base64 converts text or binary data into a text-based format that can be used in systems that handle plain characters more easily. Common examples include data URIs, email attachments, application data, and some web-development workflows.
No. Base64 is encoding, not encryption. Anyone with the encoded value can usually decode it. Do not use Base64 alone to protect passwords, private keys, access tokens, or confidential information.
Enter or paste text into the input area, then click "Encode to Base64." The tool processes supported input locally in your browser, and you can copy or download the resulting Base64 text.
Base64 usually increases the size of data by about 33%. In general, every 3 bytes of original data become 4 Base64 characters, with optional padding added when needed.
The tool is designed to process supported input locally in your browser, so selected text is not sent to our servers during encoding. Avoid entering passwords, private keys, access tokens, or confidential data into any online tool unless you understand your security requirements.
Yes. The tool is free to use without registration or hidden charges. Processing limits can still depend on your browser, device memory, and the size of the text.
Encoding converts original text or data into Base64 format. Decoding converts valid Base64 data back into its original representation. Base64 decoding does not decrypt encrypted information or bypass password protection.
Standard Base64 and Base64URL are slightly different. Base64URL replaces plus (+) and slash (/) with hyphen (-) and underscore (_). Use Base64URL only if the tool specifically provides that option or your application requires it.