URL Encoder / Decoder
Transform text into safe URI components and vice versa. All processing happens locally in your browser.
Privacy-first
Your data is processed entirely in your browser. We do not upload, store, or transmit your data to any server.
Understanding this Utility
A URL Encoder/Decoder transforms plain text into safe URI components and vice versa. All processing is performed locally in your browser using native JavaScript APIs.
How It Works
This tool uses the native `encodeURIComponent()` and `decodeURIComponent()` functions. These functions ensure that special characters (like spaces, `&`, `?`, `=`, and Unicode/emoji) are safely percent-encoded so they can be used as part of a URL query string or path without breaking the URL structure.
URI Component vs. Full URL
This tool encodes/decodes **URI components** (e.g., a single query parameter value), not entire URLs. For encoding a full URL, different rules apply (using `encodeURI()`), which is outside the scope of this specific utility.
Error Handling
If you attempt to decode a string with malformed percent-encoding (e.g., `%ZZ` or a truncated `%2`), the tool will explicitly reject it with an error message rather than silently failing or returning corrupted text.
Privacy & Processing
🔒 **100% Client-Side.** Your text is processed entirely in your browser's memory. No data is sent to any server, stored in local storage, or included in analytics payloads.