Base64 Encoder/Decoder
Encode and decode Base64
Type
converter
Input
text
Output
text
- ✓ Free to use
- ✓ No registration required
- ✓ No file size limits
- ✓ Fast processing
- ✓ Secure & private
Base64 Encoder/Decoder converts text and binary data to and from Base64 encoding. Base64 is widely used in web development for embedding images in HTML/CSS, transmitting binary data via APIs, encoding email attachments, and storing binary data in JSON or XML.
- 1Choose "Encode" or "Decode" mode.
- 2Paste your plain text or Base64 string into the input field.
- 3Click "Encode" or "Decode" to convert the data.
- 4Copy the output string with one click.
- →Encoding image files as Base64 strings for embedding in CSS or HTML.
- →Decoding Base64 API responses to read the original data.
- →Encoding credentials for HTTP Basic Authentication headers.
- →Storing binary data in JSON fields that only accept strings.
- →Encoding email attachments in MIME format.
Does Base64 encrypt my data?
No. Base64 is an encoding format, not encryption. The data can be decoded by anyone. Do not use it for security.
Why is Base64 output longer than the input?
Base64 increases data size by approximately 33% because it encodes every 3 bytes of input as 4 ASCII characters.
Can I encode files as Base64?
Yes. File-to-Base64 encoding is supported. This is commonly used for embedding small images directly in code.
Is Base64 the same as URL encoding?
No. Base64 and URL encoding are different. URL encoding uses % followed by hex values, while Base64 uses A–Z, a–z, 0–9, + and /.