Base64 Encode/Decode
Free online Base64 encoder and decoder. Encode text to Base64 or decode Base64 back to readable text instantly.
About This Free Online Base64 Encode/Decode
Our free Base64 encoder and decoder converts text to and from Base64, the encoding used to represent binary and text data with a safe set of ASCII characters. Encoding turns your text into a Base64 string, while decoding turns a Base64 string back into readable text. Paste your input, choose a direction, and the result appears instantly. Developers rely on Base64 for embedding data in URLs and JSON, encoding credentials and tokens, transmitting data in APIs and emails, and inlining small files in HTML and CSS. Doing this conversion by hand is impractical, so an instant tool is a daily time-saver. Because everything runs locally in your browser, even sensitive strings are never uploaded, and the tool is free with no signup.
Features of Our Base64 Encode/Decode
- Encode mode — converts text to Base64 format
- Decode mode — converts Base64 back to readable text
- Handles all text encodings and special characters
- Real-time conversion as you type
- Copy result to clipboard with one click
- 100% private — browser-only processing
How to Use the Base64 Encode/Decode
The Base64 Encode/Decode works right in your browser — no signup, no installation. Follow these steps:
- Type or paste your text into the input area.
- Click Encode to convert to Base64 format.
- Click Decode to convert a Base64 string back to plain text.
- Use Copy Result to copy the converted output.
Frequently Asked Questions About Base64 Encode/Decode
What is Base64 used for?
Base64 is commonly used for embedding images directly in HTML or CSS, encoding email attachments (MIME), storing binary data in JSON, and transmitting binary data over text-based protocols like HTTP.
Is Base64 encryption?
No. Base64 is an encoding scheme, not encryption. It converts binary data to text format for safe transmission. Base64 can be decoded by anyone — it does not provide any security or confidentiality.
Why is Base64 longer than the original text?
Base64 encoding increases the data size by approximately 33%. This is because it encodes 3 bytes of binary data into 4 ASCII characters, resulting in a larger output than the input.
Why Choose the Base64 Encode/Decode?
Converting data should be quick and lossless. The Base64 Encode/Decode transforms your input the instant you paste it, handles edge cases cleanly, and does all the work in your browser — so there is no upload, no waiting, and no copy of your data on a server somewhere.