Query String Encoding: How to Safely Pass Data in URLs
Encode query parameters correctly: when to use encodeURIComponent vs encodeURI, handling arrays, nested objects, and special characters in GET requests.
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Tags: encoding, url, developer-tools
Query String Encoding: How to Safely Pass Data in URLs Query strings look simple. . But the moment your values contain ampersands, equals signs, arrays, or non-ASCII text, the simplicity evaporates. This guide covers everything you need to build query strings safely — from encoding individual values to handling arrays and nested objects, with the API as your primary tool. Encoding Individual Key-Value Pairs The rule is simple: encode each key and each value separately using , then assemble with and . Notice that , , , in the values are all encoded. This prevents the server from interpreting them as query string delimiters. Do not encode the entire query string at once. That would encode the and delimiters themselves, producing a single opaque blob instead of structured key-value pairs.…
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