What is Base64?
Base64 is a text format that represents binary data using 64 safe characters. It is everywhere: API tokens, email attachments, embedded images, and authentication headers all lean on it.
This tool encodes plain text into Base64 and decodes Base64 back into readable text. Both directions work instantly, and the result is safe to copy anywhere.
How to use this tool
- Type or paste your text.
- Click Encode to turn it into Base64.
- Click Decode to turn Base64 back into text.
- Use the swap button to move the output back into the input.
When to use Base64
- Sharing data between systems that only accept text.
- Embedding small images inside HTML or CSS files.
- Encoding binary data in JSON payloads.
An important reminder
Base64 is not encryption. It is easy for anyone to reverse, so do not use it to hide passwords or personal data. Use it for transport and compatibility, and keep real secrets behind proper encryption.
Frequently Asked Questions
Base64 is a way to represent binary or text data using only 64 safe characters. It is used to send data through systems that only handle text, like emails or URLs.
No. Base64 is encoding, not encryption. Anyone can decode it, so it should never be used to protect secrets. It is for transport, not security.
The equals sign is padding. Base64 works in groups of three bytes, so shorter inputs add = or == to make the length a multiple of four.
Yes. Unicode text like Hindi or emoji is converted properly, so encoding and decoding works for any language.
No. Encoding and decoding happen entirely in your browser. Your text never leaves your device.
Sending binary data in APIs, embedding small images in HTML or CSS, storing tokens, and representing data in formats that only accept text.