URL Encoder & Decoder

A URL encoder converts text or URL components into a form suitable for use in URLs by replacing special characters with percent-encoded sequences (e.g., space becomes %20). It uses UTF-8 encoding so Unicode characters are handled correctly.

A URL decoder converts percent-encoded values back into their readable representation. It scans for %XX sequences and replaces each with the corresponding character, validating the input and reporting errors for malformed sequences.

URL encoding, also called percent encoding, represents characters using a percent sign (%) followed by two hexadecimal digits. It allows characters that have special meaning in URLs (such as ?, &, = and #) to be safely used as data.

%20 is the percent-encoded representation of a space character. The 20 is the hexadecimal value of the ASCII code for space (32 in decimal). Spaces in URL components should be encoded as %20.

URLs cannot contain literal spaces. A space would be interpreted as the end of the URL or cause parsing errors. Spaces must be encoded as %20 (percent encoding) or + (form-style query encoding) so they can be safely transmitted.

Percent encoding is the mechanism by which characters that are not allowed in or have special meaning in URLs are represented as a percent sign followed by two hexadecimal digits. For example, & is encoded as %26 and # as %23.

No. Encoding an entire URL as a single component corrupts its structure by encoding structural characters like :, /, ? and &. Use Full URL mode to preserve the URL structure and only encode the characters within each component that need encoding.

Use Query Parameter mode or the Query Parameter Builder. Each parameter key and value is encoded individually using standards-compliant percent encoding, so special characters like & and = inside values do not break the query string structure.

Double encoding happens when a value is encoded more than once. For example, a space is first encoded as %20, then encoding again produces %2520 (an encoded %20). This tool detects possible double encoding and warns you, but never automatically decodes multiple times.

URL encoding makes text safe for use in URLs by encoding special characters as %XX sequences. Base64 encodes binary data as a string of ASCII characters for transport through text-based systems. They serve different purposes and are not interchangeable.

No. URL encoding is not encryption and provides no confidentiality. Anyone with the encoded value can decode it instantly without a key. Do not use URL encoding to protect sensitive information.

No. All encoding and decoding runs entirely in your browser. Your URLs and query strings are never uploaded or stored, and your data is not included in analytics.