Free Online Base64 Encoder Decoder Tool
Encode text as Base64 or decode valid Base64 text in your browser. Inspect encoding examples without uploading a binary file.
Paste text or code below
This application processes pasted content in this browser. No file upload is required.
Supported inputs, outputs, and browsers
- Supported input
- Pasted Unicode text or code
- Output
- Copyable text, UTF-8 TXT
- Browser compatibility
- Use a current version of Chrome, Edge, Firefox, or Safari with JavaScript, File API, Canvas, and downloads enabled. Available memory and browser format support can limit very large files.
How to use Base64 Encoder Decoder
- 1.Paste plain text or a Base64 string into the text field.
- 2.Run the tool to see the Base64 encoding of the input and, when the input is valid Base64, its decoded text.
- 3.Copy or download the text result, then verify it in the application or protocol that will consume it.
Limitations
- Base64 is reversible encoding, not encryption; standard Base64 and Base64URL use different alphabet and padding conventions.
Privacy and processing
Local browser processing
The input content never leaves your device. Processing happens inside your browser, with no file or text upload to an external processing server. No registration is required, so the content-processing step is private to your device.
Frequently asked questions
What should I know before using Base64 Encoder Decoder?
Base64 is reversible encoding, not encryption; standard Base64 and Base64URL use different alphabet and padding conventions.
Where is my input processed?
The input content never leaves your device. Processing happens inside your browser, with no file or text upload to an external processing server. No registration is required, so the content-processing step is private to your device.