What is Base64 encoding used for?

Base64 encoding converts binary data into an ASCII text string. It's commonly used to embed small images as data URIs, attach files in emails, or safely transmit binary data through channels that only reliably handle text.

Is Base64 the same as encryption?

No. Base64 is a reversible encoding, not encryption. Anyone can decode a Base64 string instantly, so it provides no security. Never use it to hide passwords, tokens, or other sensitive data.

What is URL encoding (percent-encoding) used for?

URL encoding converts special characters (spaces, &, =, ?, and non-ASCII characters) into a percent-encoded format so they can be safely included in a URL or query string without breaking its structure.

Does this tool support Korean and other Unicode text?

Yes. Both the Base64 and URL modes are fully UTF-8 safe, so Korean, Japanese, emoji, and any other Unicode characters are encoded and decoded correctly without corruption.

Is my text sent to any server?

No. All encoding and decoding happens entirely in your browser using JavaScript. Your text never leaves your device and is never uploaded or stored anywhere.

Base64 & URL Encoder/Decoder

Encode or decode Base64 and URL-encoded text instantly in your browser. Free, fast, UTF-8 safe, and fully private.

Input

Result

How it Works

Convert between Base64, URL encoding, and plain text in seconds.

Choose a Mode

Pick Base64 or URL, and whether you want to encode or decode your text.

Paste Your Text

Type or paste your text into the input box. The result is computed live as you type.

Copy the Result

Copy the converted output with one click, or hit Swap to reverse the conversion.

Tips & Facts

Understand what these encodings do and when to use them.

Data URIs & Transport

Base64 is commonly used to embed small images as data URIs or to safely transmit binary data as text.

Safe Query Strings

URL encoding is needed for special characters in query strings, such as spaces, &, and = signs.

Not Encryption

Base64 is NOT encryption. Anyone can decode it, so don't use it to hide sensitive data.

Unicode Ready

This tool correctly handles Korean and other non-Latin text thanks to full UTF-8 support.