What is Base64?
Base64 encodes binary data using 64 printable characters (A–Z, a–z, 0–9, + and /). It is used to embed data in emails, JSON, URLs and data URIs. It is an encoding, not encryption — anyone can decode it.
Frequently asked questions
Is my data uploaded anywhere?
No. This tool runs entirely in your browser. Your data never leaves your device, and nothing is stored on our servers.
What is URL-safe Base64?
A variant that replaces + with - and / with _ and drops the = padding, so the result can be used in URLs and file names.
Need to encode an image?
Use the Image to Base64 converter.