URL Query String Editor

Paste a full URL or query string, edit key-value parameters in a table, and rebuild a standard query string instantly

Report

Input

Output

Paste a URL or query string above and click "Parse" — parameters will appear here as a table.

Edit Parameters

Key	Value	Action
Paste a URL or query string above and click "Parse" — parameters will appear here as a table.

Paste Input

Paste a full URL or raw query string (e.g. a=1&b=2) into the input box. Click "Parse" or paste to trigger auto-parsing.

Edit Parameters

Each query parameter appears as a separate row. Edit keys or values directly, delete rows, or add new empty rows.

Copy Output

The rebuilt query string updates in real time. Copy the raw query string, the version with ?, or the full URL if a base URL was detected.

Note: All processing happens in your browser. If your URL contains sensitive tokens, make sure you are in a secure environment.

How is this different from the URL Encode/Decode tool?

The URL Encode/Decode tool (url-converter) is focused on percent-encoding transformation. This editor is focused on the full round-trip of parsing → table editing → re-serializing query parameters — a different use case.

Why does a space in the query become + or %20?

Query strings use the application/x-www-form-urlencoded encoding spec, where spaces are commonly represented as +. However, URLSearchParams.toString() outputs %20 by default. This tool uses %20, which is semantically equivalent to + and decoded correctly by servers in both forms.

Are duplicate keys supported (e.g. tag=a&tag=b)?

Yes. You can have multiple rows with the same key name. They are serialized in row order as key=value1&key=value2. When exporting as JSON, duplicate keys are merged into an array.

Is my URL or token uploaded to your server?

No. All parsing and serialization runs entirely in your browser — no network requests are made. If your URL contains a sensitive token, make sure you are on a trusted device and network.

Why does the output query string not match the original exactly?

URLSearchParams performs encoding normalization (e.g. converting special characters to percent-encoded form), so the output is semantically equivalent to the input but may not match character for character. If you need the exact original string, copy it directly from the input box.

encoding Unicode URL-encoding

2026-06-03

Encoding Standards and Network Transmission: A Complete Guide to Character and URL Encoding

Understand the mechanics of character encoding, Base64 applications, and the vital role of URL encoding in modern web communication to resolve encoding issues.

binary hexadecimal number systems

2026-04-22

Binary & Hexadecimal Complete Guide: Number Systems, Conversion Methods, and Programming Applications

Why do computers only use 0s and 1s? How is the CSS color #FF5733 calculated? This guide explains the fundamentals of number systems, walking through binary, octal, and hexadecimal conversions, and showing how each base is used in real programming scenarios — color codes, memory addresses, URL encoding, Base64, and checksum outputs.

API HTTP Web Development

2026-06-28

API Error State Decision Framework: From HTTP Status Codes to System Resilience

API error handling is more than just returning codes; it is a testament to system robustness. This article establishes a decision framework based on HTTP status code semantics to optimize API feedback mechanisms.

barcode qr-code automation

2026-06-28

Barcode and QR Code Application Dynamics: From Selection Logic to Fault Tolerance Strategy

In an era of increasing automated identification needs, selecting the right barcode or QR code is not just a formatting choice; it impacts transmission efficiency and hardware compatibility. This article explores the logic behind code selection, QR code error correction levels, and practical decision-making frameworks.

encoding Base64 URL-encoding

2026-06-03

Deep Dive into Encoding Systems: From Character Mapping to Binary Representation

Understand the mechanisms of character encoding, Base64 conversion, and URL encoding in modern digital systems to ensure accurate data transmission and conversion.

encoding Unicode UTF-8

2026-05-24

Character Encoding Standards: A Comprehensive Guide from ASCII to Unicode

A deep dive into the evolution of character encoding, from basic ASCII to the practical application of Unicode and UTF-8, ensuring your apps remain garbage-free.