A Base64 encoder that never sends your text anywhere.
Base64 Encoder converts plain text to Base64, and Base64 back to plain text, live as you type, in either direction. Everything runs locally in your browser using native encoding APIs. Nothing is uploaded, nothing is saved, and closing the tab erases it completely. No install, no account, no sign-up required.
Opens instantly · Nothing to install · No sign-up · Works in Chrome, Edge, Firefox & Safari
Private by design
There is no server in the loop, so there is nothing to leak.
100% in your browser
Encoding and decoding both happen with native browser APIs. Your text never leaves your device.
Live, both directions
Type text and watch Base64 appear, or paste Base64 and watch the decoded text appear, no button required.
Handles multi-byte text
Full UTF-8 support means emoji and accented characters round-trip correctly every time.
How it works
Three steps, zero setup.
Type or paste
Enter plain text on the left, or Base64 on the right — either side can be your starting point.
Watch it convert
The other panel updates live as you type, no button to click.
Copy or download
Grab the result with one click, or save it as a .txt file.
Frequently asked questions
Is Base64 Encoder really private? Is my data uploaded?
No. All encoding and decoding happens locally in your browser using native JavaScript APIs. Your text is never sent to a server.
Do I need to install anything or create an account?
No install and no account. Base64 Encoder runs entirely in your web browser, just open the page and use it.
Is Base64 Encoder free?
Yes, Base64 Encoder is completely free to use. It runs in your browser with nothing to buy and no account to create.