SuperUtility

URL & Base64 Encoder/Decoder

Encode and decode web URLs and Base64 format strings safely and instantly in-browser.

Input Text
Converted Output

About SuperUtility URL & Base64 Converter

SuperUtility offers a highly robust, developer-grade URL & Base64 Encoder / Decoder. Translating, sanitizing, and encoding strings are fundamental daily tasks in web development, database management, and network request formatting.

Our dual-utility panel allows you to perform URL Percent-Encoding (to sanitize query parameter keys, pathnames, and search parameters for API requests) and Base64 Encoding (to convert plain text strings into binary-to-text representations safe for data storage, basic authentication headers, or embedded media streams). With built-in UTF-8 safety checks, our converter is completely protected against Unicode character crashes.

Frequently Asked Questions

What is URL Encoding (Percent-Encoding) and why is it needed?

URLs can only contain standard ASCII alphanumeric characters. Punctuation or special symbols (like spaces, ampersands, or slashes) have reserved functional meanings in URLs. URL encoding converts these non-ASCII or reserved characters into a safe percent sign followed by their hexadecimal code (e.g. spaces become %20), preventing broken API routes.

What is Base64 Encoding?

Base64 is a binary-to-text encoding scheme that translates raw data into a safe set of 64 standard ASCII characters (containing uppercase and lowercase letters, numbers, and the symbols +, /, and = for padding). It is commonly used to safely embed images in HTML documents or transmit credentials in Basic Auth headers.

Why do other Base64 generators fail on special characters?

Standard browser JavaScript functions like btoa() and atob() only support 8-bit ASCII characters. If you enter non-ASCII Unicode characters (such as emojis or accented characters like á, ö, or Chinese letters), they throw a fatal exception. SuperUtility fixes this by wrapping conversions in a safe UTF-8 binary mapper.

Is my input data secure and offline-capable?

Yes, entirely. The conversion functions execute instantly in local browser memory. None of the text strings or encoded keys are ever sent across the network, making it completely secure for API tokens, secret keys, or confidential parameters.

URL & Base64 Conversion Examples

URL Percent-Encoding Examples

Observe how query parameter spaces and ampersands are encoded safely:

// Input Plain URL Parameter:
"John Doe & Sons"

// URL Encoded:
"John%20Doe%20%26%20Sons"

// Input Complete Route:
"https://superutility.xyz/tools/password-generator?length=16"

// URL Encoded (Full sanitization):
"https%3A%2F%2Fsuperutility.xyz%2Ftools%2Fpassword-generator%3Flength%3D16"

Base64 Unicode Encoding Examples

Convert complex multi-byte characters and strings cleanly:

// Input Text:
"SuperUtility"

// Base64 Encoded Output:
"U3VwZXJVdGlsaXR5"

// Input Unicode string (Standard btoa fails, but SuperUtility succeeds):
"Hello 世界"

// Base64 Encoded Output:
"SGVsbG8g5LiW55WM"