How to use the Base64 Encoder / Decoder
- Fill in the fields above.
- The result updates instantly in your browser — nothing is uploaded.
- Copy or download the output with one click.
About this tool
Encode or decode Base64 text (UTF-8 safe). It is part of the Developer & Utility collection on URLMode — generators, encoders and handy everyday utilities.
Frequently asked questions
Is the Base64 Encoder / Decoder free?
Yes. The Base64 Encoder / Decoder on URLMode is 100% free to use, with no sign-up required.
Do I need to install anything?
No. It runs online in any modern browser on desktop, tablet or phone.
Is my data safe?
Yes. This tool runs entirely in your browser, so your input never leaves your device.