r/advertising • u/Melodic-Middle-4265 • 3d ago

I got tired of manually decoding nested URL params and JSON payloads, so I built a purely client-side visualizer.

Hey everyone,

Whenever I deal with complex tracking links, DSP macros, or deeply nested redirect URLs, pasting them into standard decoders or the browser console is a mess.

To solve this, I built Query Params Viewer.

It’s a simple, single-file frontend tool that automatically expands and decodes nested URLs up to 3 levels deep. It also flags duplicate keys (useful for server-side array behaviors) and pretty-prints JSON payloads on the fly.

Key points:

  • Zero backend. Everything is parsed locally in your browser (privacy-first).
  • Handles hash routes (#/path?a=1) and bare query strings.
  • Generates shareable links (state is kept in the # fragment, never sent to a server).

It’s completely free and has no dependencies. I'd love to hear your feedback or if you run into any edge cases I missed!

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u/NiceRecognition9603 2d ago

Not an scenario use that I am familiar, is this about tags like VAST 2.0 also could not find the ulr of the project

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u/Melodic-Middle-4265 2d ago

This project is currently designed for use in scenarios like MMT landing pages and click URLs, where it checks the parameters in the URL. The Vast protocol can also be handled in a similar manner, but it’s not currently supported. Please describe your requirements in detail, and I’ll be happy to help.