🔐 Online Base64 Encoder / Decoder
Encode and decode Base64 strings, data URIs or ASCII-safe text online instantly. Free Base64 encoder/decoder for developers, web and APIs.
Quick Answers
What does Base64 Encode/Decode do?
This tool encodes and decodes text or data to/from Base64. Useful for embedding images as data URIs in CSS/HTML, inspecting authentication tokens or decoding a Basic Auth header.
How do I use Base64 Encode/Decode?
Type your text or Base64, click Encode or Decode. The result appears instantly. You can copy the result or swap the direction in one click.
Who is Base64 Encode/Decode for?
Web developers preparing data URIs, API engineers inspecting JWTs, integrators working with Basic Auth headers, and students learning about data encoding.
Is it free and private?
Yes, free and no signup. Everything is processed client-side in your browser, no encoded string is sent to or stored on our servers.