Text & encoding
File to Base64
Convert a small local file to Base64 without uploading it. Nothing you enter leaves your browser.
The selected file is processed only in this browser. No upload is made.
Your result will appear here.
What this tool does
About the File to Base64
This converter reads file input and rewrites the same usable information as Base64. It changes the representation, not the meaning of the source data, except where the target format cannot express the same structure.
It is useful for preparing text for another system, inspecting an encoded value, or applying a repeatable cleanup step.
How to use it
- Choose the source file in the workbench.
- Review any output settings shown beside the file control. Then select “Convert file.”
- Inspect the result and download the new file. Keep the original until you have verified the converted copy.
Practical example
Start with a known input
Try this sample input: Use the pre-filled sample values in the workbench. Select “Convert file” and compare the result with the source before using it elsewhere.
What to know about the result
- Base64 is an encoding, not encryption. It makes binary or text data easier to transport in text systems but increases the encoded size.
- Processing happens in this browser. Your entered text and selected files are not sent to FormatCalc for conversion.
Common questions
Using the File to Base64
Is the File to Base64 free to use?
Yes. FormatCalc's File to Base64 is free to use with no account required.
Is my data private when I use the File to Base64?
Yes. This tool processes your input locally in your browser. FormatCalc does not upload or store what you enter.
How do I use the File to Base64?
Choose or paste your file data, then choose Convert file. The conversion stays on your device.
What should I check before using the result?
Base64 is an encoding, not encryption. It makes binary or text data easier to transport in text systems but increases the encoded size. Processing happens in this browser. Your entered text and selected files are not sent to FormatCalc for conversion.