# JSON Viewer vs NotesIQ: which to pick

> JSON Viewer vs NotesIQ: pricing, platforms, launches, upvotes and founders side by side on ProductsFarm, with notes on which to pick.

Canonical: https://productsfarm.com/compare/json-viewer-vs-notesiq
Last updated: 2026-11-14

|  | [JSON Viewer](https://productsfarm.com/product/json-viewer) | [NotesIQ](https://productsfarm.com/product/notesiq) |
| --- | --- | --- |
| What it is | Turn JSON, YAML and CSV into interactive diagrams for developers | Analytics and scheduling for Substack Notes, inside your browser |
| Pricing | Freemium | Paid |
| Platforms | iOS, Android, Chrome extension, Web, API | Chrome extension, Web |
| Categories | Developer tools, Analytics | Analytics, Marketing, Writing and content |
| Made for | developers, data analysts, engineering leads | substack writers, newsletter creators, independent publishers |
| Built with | [Next.js](https://productsfarm.com/tech-stack/nextjs), [React](https://productsfarm.com/tech-stack/react), [Netlify](https://productsfarm.com/tech-stack/netlify), [Lemon Squeezy](https://productsfarm.com/tech-stack/lemon-squeezy), [Google Analytics](https://productsfarm.com/tech-stack/google-analytics), [Tailwind CSS](https://productsfarm.com/tech-stack/tailwind-css) | [Next.js](https://productsfarm.com/tech-stack/nextjs), [React](https://productsfarm.com/tech-stack/react), [Vercel](https://productsfarm.com/tech-stack/vercel), [Dodo Payments](https://productsfarm.com/tech-stack/dodo-payments), [Google Analytics](https://productsfarm.com/tech-stack/google-analytics), [Tailwind CSS](https://productsfarm.com/tech-stack/tailwind-css) |
| Upvotes | 0 | 25 |
| Website | [jsonviewer.tools](https://jsonviewer.tools/) | [notesiq.app](https://www.notesiq.app/) |

## About JSON Viewer

JSON Viewer is a browser-based tool that turns JSON, YAML, XML, CSV, TOML and TOON into interactive node-edge diagrams. Graph, collapsible tree and table views show the same data, and values can be edited inside diagram nodes with the raw syntax updating to match.

Users can compare payload versions with a visual diff that marks added, deleted and changed fields, and validate data against JSON Schema drafts 7 and 2020-12 with errors highlighted on the diagram. A Chrome extension and a VS Code extension are also offered, along with native apps for Android and iOS.

Processing runs on the user's device, according to the site, and the free plan covers viewing and exploring with PNG downloads. Paid plans add features such as SVG and PDF export, ad-free use, saved cloud diagrams and an AI assistant. The tool is aimed at developers, engineering leads and data analysts.

## About NotesIQ

NotesIQ is a Chrome extension for Substack writers who want to understand how their Substack Notes perform. It reads your Notes through your existing Substack session and shows them in a dashboard ranked by engagement, with likes, restacks, comments and content type tracked for each Note. A Viral Alert flags a Note that takes off compared with your own baseline, and the tool keeps a longer history than Substack's own dashboard, which the site says shows only the last 90 days.

The extension also helps with timing and posting. A 7-day by 6-time-slot Best Time heatmap is built from your own posting history, alongside your current posting streak. You can compose a single Note or load a week of Notes into a queue, and NotesIQ uses Substack's own scheduler to publish them at the times you set. A Media Kit feature turns your subscriber count, top Notes and engagement into a one-page sponsor summary that can be exported from the panel.

NotesIQ is aimed at Substack creators who post Notes regularly and want to decide what to write and when based on their own numbers. The site says your Notes, profile and subscriber stats stay in your browser's storage, with no NotesIQ server receiving them, and that the product is a one-time $4.99 lifetime purchase with no subscription.

## Related

- [JSON Viewer](https://productsfarm.com/product/json-viewer)
- [NotesIQ](https://productsfarm.com/product/notesiq)
- [More comparisons](https://productsfarm.com/compare)