Editor's pickURL encodingUnicodeJavaScriptURLSearchParams
How to Encode Unicode Characters in a URL
Learn to encode accented and non-Latin text in URL values, avoid double encoding, preserve URL structure, and verify query parameters in a browser.
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Editor's pickquery parametersHTTP caching
Does Query Parameter Order Matter? Caches, APIs, and Signatures
Learn when reordered query parameters change API behavior, HTTP cache keys, or signed URLs, with paired examples and practical debugging steps.
URL encodingpercent-encoding
How to URL Encode Spaces and Special Characters in File Names
Learn how to URL encode spaces, Unicode, and reserved characters in file names, avoid double-encoding, and test download links across browsers and servers.
URL encodingAPI debugging
How to Fix Double-Encoded URL Parameters
Learn how double-encoded query parameters happen, trace encoding across clients and servers, inspect raw requests, and fix serialization without unsafe repeated decoding.
URL encodingEcommerce
How to Encode Special Characters in Product URLs
Learn to encode spaces, ampersands, and plus signs in product URL paths and query values, with JavaScript examples for variants and filters.
URL encodingJavaScript
Path Segments or Query Parameters? How to Encode User Input in URLs
Learn when user input belongs in a URL path or query parameter, how to encode each safely, and how to handle Unicode, reserved characters, and double encoding.