Local Developer Tool

Base64 Encoder Decoder

Encode text, decode Base64 strings, or convert an image into a Base64 Data URL. Everything runs locally in this browser tab.

Browser-only processing

Uses native JavaScript, FileReader, Blob, and Clipboard APIs. No upload endpoint, account, or backend service is used.

Input Text

Paste regular text to encode it as Base64.

Encode

Base64 Output

Copy the encoded Base64 string or download it as a .txt file.

Text encoded to Base64 locally.

UTF-8 text support

Encode and decode multilingual text with TextEncoder and TextDecoder.

Data URL preview

Image conversion shows a live preview and the full Base64 Data URL output.

Local export

Copy the result or save it as a plain .txt file from this browser tab.

100% private and secure

Text, Base64 content, and image files are processed only in your local browser and are never uploaded.

Base64 Converter for Text and Images

A Base64 encoder online is useful whenever developers, content editors, support teams, and technical operators need to turn readable text into an ASCII-safe string for testing, configuration, API examples, emails, JSON payloads, or quick documentation. This page also provides a focused Base64 decoder online and an image to Base64 workflow for small graphics, icons, placeholders, screenshots, and interface assets. Everything stays inside your current browser tab.