URL Encode Query String Parameters for Web APIs

When sending query parameters containing ampersands (&), slashes (/), hash symbols (#), or spaces to REST APIs, web servers often misinterpret the query structure. You can encode individual parameter values safely using standard component encoding.

Step by step

  1. 1

    Input Parameter Text

    Paste the raw string value containing special characters or punctuation.

  2. 2

    Select Component Mode

    Select 'Value (encodeURIComponent)' for individual query values.

  3. 3

    Copy Escaped Value

    Copy the safely escaped string and append it to your target API request URL.

Component Mode vs. Full URL Mode

Choose 'Value (encodeURIComponent)' mode to rigorously escape all reserved characters within individual parameter values, ensuring backend parsers receive pristine data without breaking HTTP request routes.

Space to Plus (+) Toggle

Toggle between '%20' and '+' for space representation to match the specific query format requirements of your target API server or search endpoint.

Guides by situation

URL Encode & Decode →

Frequently asked

What is the difference between encodeURI and encodeURIComponent?

encodeURI preserves URL structure characters (like '://', '?', '&'), whereas encodeURIComponent encodes all reserved punctuation for query values.

Does this tool make actual API requests or ping endpoints?

No, this is an offline string encoder and parser; it does not check link status or send HTTP requests.