Base64 Encode / Decode
Encode text to Base64 or decode Base64 back to text. Runs entirely in your browser — nothing is sent anywhere, which matters when the data is sensitive.
private This tool runs entirely in your
browser. Nothing you enter is sent to our server or anyone else.
What Base64 is for
Base64 rewrites binary data using 64 safe printable characters so it survives systems that only expect text — email attachments, data URIs, JSON payloads, HTTP basic-auth headers. It is encoding, not encryption: anyone can decode it, so never treat Base64 as a way to hide a secret. This tool decodes it in your browser precisely so that secrets you are inspecting never leave your machine.