Encode & Decode Base64 Without Sending Data — Client-Side Free Tool

Base64 encode or decode strings and files entirely in your browser. Your data is never uploaded or stored anywhere — 100% client-side.

Frequently Asked Questions

What is Base64 encoding used for?

Base64 encodes binary data (like images or files) into ASCII text for transmission in systems that only handle text — such as email, JSON APIs, or data URIs in HTML/CSS.

Can I encode files (not just text) to Base64?

Yes. Upload any file and the tool converts it to a Base64 string. Useful for embedding images directly in HTML/CSS or sending files in JSON payloads.

Does Base64 encryption protect my data?

No. Base64 is encoding, not encryption. It obscures data but is trivially reversible. Never use Base64 alone to protect sensitive information — use proper encryption instead.

Is my data sent to a server when I encode or decode?

No. All Base64 encoding and decoding happens in your browser using JavaScript. Your data stays on your device.