Convert tools

URL Builder

Build an HTTP or HTTPS URL from a base, JSON query values and a fragment.

Convert in your browser · No sign-up

Replaces the existing query. Arrays produce repeated parameters; null becomes empty. The URL is constructed without being opened.

Up to 100,000 UTF-16 units per input and 1,000,000 per result. See the supported formats and examples below.

How to use

  1. Build an HTTP or HTTPS URL from a base, JSON query values and a fragment.
  2. Choose the mode or options, then run the tool.
  3. Review the result, then copy or download the TXT file.

Example

URL + {"q":"hello world"} → ?q=hello+world

Details and limitations

Replaces the existing query. Arrays produce repeated parameters; null becomes empty. The URL is constructed without being opened.

Text stays in your browser; it is not sent to a conversion server.

FAQ

URL Builder — What are the supported inputs and limits?

Replaces the existing query. Arrays produce repeated parameters; null becomes empty. The URL is constructed without being opened.

Format references

Tool page updated: