Query Params to JSON
Convert URL query strings or parameter lists into formatted JSON objects with client-side privacy.
How URL Query Params to JSON Converter Works & Technical Principles
Parse, decode, and transform complex URL query parameters into formatted JSON key-value pairs in real time. All processing runs client-side with zero data tracking.
Technical Overview: Percent-Encoded Search Params to Key-Value Maps
URL query strings follow key=value pairs concatenated by ampersands (&) with percent-encoding for special characters. Converting them into JSON deserializes encoded characters (such as %20 to spaces) and nests repeated parameter keys into clean array structures.
Input & Configuration
Paste a complete URL (https://example.com?foo=bar) or just the query string portion (foo=bar&baz=1).
Client-Side Processing
The browser's URLSearchParams API strips hashes, decodes percent-encoded entities, and extracts keys.
Instant Output & Export
View the structured JSON output with automatic number/boolean detection, copy to clipboard, or download.
Key Capabilities & Features
Automatic URL Sanitization
Intelligently extracts query parameters whether you paste a full URL with protocol and path or just a raw query string.
Handles Repeated Keys & Arrays
Detects duplicate keys (e.g., tag=react&tag=vue) and serializes them into clean JSON arrays.
100% In-Browser Privacy Guarantee
Authentication query params, tracking tokens, and session identifiers are parsed locally and never logged.
Percent-Encoding Decoded
Accurately decodes URI-encoded characters like spaces, slashes, punctuation, and Unicode symbols.
Standard URL and URLSearchParams parsing algorithm
Uniform Resource Identifier (URI): Generic Syntax