Common uses
- Prepare Base64 values for APIs, configuration or development tests.
- Create a Data URL for a small file or embedded asset.
- Decode received Base64 data and save it with the correct filename and MIME type.
Base64 Encode & Decode Online
Encode text or files to Base64 and decode Base64 back to text or downloadable files.
Processed locally. Never uploaded.
Text and files stay in this browser
Result
Your result will appear here.
Base64 increases file size by roughly one third. Processing is local; large files may use significant browser memory.
How it works
Done in three quick steps
- 1
Choose text or file mode.
- 2
Paste text, Base64 data or select a file.
- 3
Encode or decode, then copy or download the result.
About this tool
What you can do with Base64 encoder & decoder
This Base64 utility converts UTF-8 text or files into Base64 and decodes Base64 back into readable text or binary files. It also supports Data URLs with MIME types, while keeping the source content inside the current browser session.
Tips for better results
- Base64 is an encoding format, not encryption or a security mechanism.
- Encoded data is roughly one third larger than the original binary content.
- Use a suitable MIME type and filename when decoding data back into a file.
Good to know
Frequently asked questions
Clear answers about privacy, quality and how this tool works.