Encoder / Decoder
Base64, URL, HTML, Binary, Hex and Morse encoder & decoder.
About Encoder / Decoder
Base64, URL, HTML, Binary, Hex and Morse encoder & decoder.
Encoder / Decoder is a one-stop string utility that handles Base64, URL percent encoding, HTML entities, binary, hexadecimal and Morse code in both directions. Paste a token, an encoded link, a garbled query string or a dot dash message and switch between formats with a single click, watching the result update live as you type. Each panel shows plain readable output with copy ready buttons, so you can move a value straight into logs, request headers or test data. The tool also flags common mistakes such as missing padding in Base64 or unescaped ampersands in HTML. Encoder / Decoder works offline once loaded, keeps your data on the machine and never asks for an account.
How to Use Encoder / Decoder
- Open the tool and allow any permission it asks for (only if needed).
- Follow the on-screen controls to run the task.
- Review the result shown live on the page.
- Copy, save or share the output as required.
Key Features
- No installation or account — just open the page and use it.
- Clear, guided interface that works on desktop and mobile.
- Everything runs locally in your browser for privacy and speed.
Frequently Asked Questions
Can this tool decode a Base64 string and encode it back?
Absolutely. Paste the encoded text into the Base64 panel and the readable version appears immediately, then reverse the process to encode it again. The same two-way flow works for URL encoding, HTML entities, binary, hex and Morse, so you can round trip a value without switching tools or writing a script.
Is Encoder / Decoder free to use?
Yes. Encoder / Decoder is completely free with unlimited use — no account, download or payment required.
Is my data uploaded to a server?
No. Encoder / Decoder runs entirely in your browser. Your inputs are never sent to our servers or stored anywhere.
Does Encoder / Decoder work on mobile?
Yes. The interface is fully responsive and works in any modern browser on Android, iPhone, tablets and desktops.