Base64 File Encoder
Encode any file to Base64 or a data URI directly in your browser. Your file is never uploaded.
Select a file — it never leaves your device.
Pure browser JavaScript — uses the FileReader API.
How to use this tool
- Choose any file.
- Pick plain Base64 or Data URI format.
- Copy the output or download it as a .txt file.
Encode any file to Base64 or a data URI directly in your browser. Your file is never uploaded.
Frequently asked questions
- What is Base64 used for?
- Embedding binary files (images, PDFs) in JSON, HTML, CSS, or email without needing a separate file reference.