Base64 Encoder / Decoder
Encode text to Base64 or decode Base64 strings. Free browser tool — no signup.
Quick Answer
Paste text to encode it to Base64, or paste a Base64 string to decode it back to plain text.
How to Use the Base64 Encoder / Decoder
- Use the input area to provide your data.
- The tool processes it instantly in your browser.
- Copy or download the result.
Frequently Asked Questions
- Is Base64 encoding the same as encryption?
- No. Base64 is encoding, not encryption. It is easily reversible without any key. Never use Base64 for security — use it only for data transmission compatibility.
- What characters does Base64 use?
- Base64 uses 64 printable characters: A-Z (26), a-z (26), 0-9 (10), + and /. The = character is used for padding at the end.
What is Base64 Encoder / Decoder?
A Base64 encoder/decoder converts binary data or text into Base64 representation and back. Base64 encoding represents binary data using 64 printable ASCII characters (A-Z, a-z, 0-9, +, /), making binary content safe for transmission in text-based systems. It is used ubiquitously in web development: data URIs for embedding images in HTML/CSS, encoding binary data in JSON APIs, encoding credentials in HTTP Basic Authentication headers, encoding JWT (JSON Web Tokens) payloads, encoding email attachments in MIME format, and transmitting binary files through text-only protocols. This tool handles UTF-8 text encoding correctly, supporting international characters and emoji in both encoding and decoding operations.
How to Use Base64 Encoder / Decoder
- Paste plain text and click Encode to Base64.
- Paste a Base64 string and click Decode from Base64.
- Copy the encoded or decoded result.
Examples
Hello, World!
SGVsbG8sIFdvcmxkIQ==
Common Use Cases
- Decoding Base64-encoded JWT token payloads
- Encoding credentials for HTTP Basic Auth headers
- Creating data URIs for small images in CSS
- Decoding Base64 email attachments for inspection
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