1. Pick a tool
Choose the Base64 tab or the URL encoding tab.
Developer tools
Base64 & URL Encoder
A Base64 and URL encoder is a free browser tool that converts text to and from Base64 or URL-encoded form instantly as you type, with a copy button for the result. All conversion runs locally in JavaScript with UTF-8 support for Korean and emoji, so your input never leaves your device and no signup is needed.
How to use
2. Type or paste
The result updates live as you type. Switch between Encode and Decode at any time.
3. Copy
Press Copy to put the result on your clipboard.
FAQ
Is my text sent to a server?
No. All conversion runs in your browser with JavaScript — your text never leaves your device.
Does it handle Korean and emoji?
Yes. Base64 uses UTF-8, so Korean, emoji, and other Unicode text round-trips correctly.
Base64 vs URL encoding — what’s the difference?
Base64 packs text or binary into a safe ASCII string (used in APIs and data URLs). URL encoding escapes special characters so text can travel safely inside a URL.
Do I need an account?
No. No install, no signup — it just works.