What Is Base64 Encoding? Uses and Limits
Base64 represents binary data as text using a limited alphabet. It is common in APIs, data URLs, and systems that expect text.
What Base64 actually does
Base64 encodes data into printable characters. The encoded result is typically larger than the original data, so it is not compression.
Encoding versus encryption
Base64 is not encryption or a security measure. Anyone with the encoded string can decode it. Never treat Base64 alone as protection for passwords, access tokens, or private documents.
Common examples
Developers encounter Base64 in email attachments, API payloads, and image data URLs. It can make data easier to transport through text-only channels.
How to encode or decode text
Open the Base64 Encoder, enter the text, choose the appropriate operation, and copy the result. Confirm that the expected character encoding, commonly UTF-8, is used.
Frequently asked questions
Can Base64 hide sensitive information?
No. Encoding is reversible and does not provide confidentiality.
Why is Base64 output longer?
Its text representation uses more characters than the underlying binary data.
Try it now
Ready to put this into practice? Open the Base64 Encoder tool.
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