Base64 Encoder & Decoder
Encode text or any file to Base64, or decode a Base64 string back to its original form. Runs entirely in your browser — your file is never uploaded anywhere.
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How to use it
Type in the text box or choose a file, then click Encode to convert to Base64. To decode a Base64 string, paste it into the box and click Decode; UTF-8 text is handled correctly.
Frequently Asked Questions
Is Base64 encryption?
No. Base64 is just an encoding that turns binary data into text — it provides no confidentiality, and anyone can reverse it.
Is it suitable for large files?
It works well for small-to-medium files (a few MB); very large files can be limited by your browser's available memory.