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Converters

Convert between formats, encodings, and units — all in your browser, all instant.

Base64 Encode / Decode
Encode or decode Base64 strings instantly in your browser.
URL Encode / Decode
Encode or decode URL components quickly and safely.
Number Base Converter
Convert between binary, octal, decimal, and hexadecimal.
Roman Numeral Converter
Convert integers to Roman numerals and back — 1 to 3999.

About Converter Tools

Encoding converters handle the transformation of data between formats used in web development, API design, and data transmission. Base64 converts binary data — images, files, arbitrary bytes — into ASCII text safe for embedding in JSON, HTML attributes, and email protocols. URL encoding converts special characters into percent-encoded sequences that can be safely placed in query strings and URL path segments without breaking the URL structure.

Both conversions are completely reversible and run instantly in your browser. They're useful in debugging API responses, inspecting JWT token payloads, preparing data for HTTP requests, and understanding how systems encode data before transmitting it. Use Base64 when working with binary data or embedding assets directly in markup, and URL encoding when preparing user input or dynamic values for inclusion in web addresses.

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