Developer utilities

Base64 encoder & decoder

Encode and decode text live as you type, turn files and images into Base64 data URIs, or decode a JWT to inspect its header and claims — all 100% client-side, nothing you enter ever leaves your browser.

URL-safe (-_ instead of +/)

Padding (=)

Plain text

Base64

0 bytes of text → 0 Base64 characters

Base64 Encoding Explained: Text, Files, Data URIs, and JWTs

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Frequently Asked Questions

Is Base64 encoding the same as encryption?

What is the difference between standard and URL-safe Base64?

Can I convert an image to Base64 for use in CSS or HTML?

Does this tool verify JWT signatures?

Is my data uploaded anywhere when I use this tool?