Base64 Encoder and Decoder — Free Online
Encode text or files to Base64 and decode Base64 strings back to text or binary online for free. Instant result, no signup or installation needed.
About Base64 Encode Decode
Base64 encoding converts binary data and text into an ASCII string format that can be safely transmitted over text-based protocols such as email, JSON APIs, and HTML data URIs. Our Base64 tool encodes any text or file to Base64 and decodes Base64 strings back to their original content. Common uses include encoding images for embedding in HTML and CSS, encoding credentials for HTTP Basic Authentication headers, passing binary data through JSON APIs, and encoding email attachments. The tool runs entirely in your browser with no data sent to any server.
Frequently Asked Questions
What is Base64 used for?
Base64 is used to safely encode binary data as ASCII text for email attachments, embedding images in HTML/CSS, and passing data through text-based APIs.
Can I encode files as well as text?
Yes — upload any file to get its Base64 encoded string.
Is Base64 the same as encryption?
No — Base64 is encoding, not encryption. It converts data to a text-safe format but does not provide security.
How do I detect if a string is Base64 encoded?
Base64 strings only contain A-Z, a-z, 0-9, +, /, and = padding characters.
Is my data processed on your servers?
No — all encoding and decoding happens in your browser.