Skip to contentConvert text and files to Base64 and back. Handles Unicode correctly.
Convert text and files to Base64 and back. Handles Unicode correctly.
Developer utilities should be fast, copy-friendly, and predictable. Paste input, get formatted or converted output, and move on — no CLI install required.
Use this free Base64 Encoder / Decoder whenever you need a reliable result without creating an account or installing software. It loads in one click and works on desktop and mobile browsers.
Tentaco runs this tool in your browser whenever possible. Text and structured input you paste are handled in the page session unless the tool explicitly fetches remote data. Close the tab or clear the page after use on shared computers. Features that call external APIs (such as URL fetchers) only send the data required for that request.
Paste text or drop a small file to get a Base64 string. Decoding restores the original bytes for download.
Switch between standard and URL-safe alphabet (replacing +/ with -_) for tokens in query strings.
No — processing runs locally in your browser. Your files and inputs do not leave your device unless the tool explicitly uses the network.
