# JSON input-check

> This extension is a JSON checker for input fields.

Canonical page: [https://chrome-stats.com/d/json-input-check](https://chrome-stats.com/d/json-input-check)

## Overview

- **ID:** `json-input-check`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Nikita Matusevich
- **Category:** web-development,appearance
- **Daily users:** 2
- **Version:** 0.2.2resigned1
- **Last updated:** 2024-04-26
- **First published:** 2018-10-15
- **Size:** 2.19 MB
- **Data as of:** 2026-09-07
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/json-input-check/)
- **Website:** [http://matusevich.it](http://matusevich.it/)

## Description

JSON input-check is a Firefox add-on that provides the best validation, formatting, and editing tools for JSON strings. Whether you need to validate a single JSON or multiple JSON inputs on a page, JSON input-check has got you covered.

## Rankings

- #67,795 — Overall
- #27 — input
- #61 — json

## Permissions and access

### Permissions

- `activeTab`

### Content script matches

- `<all_urls>`

## Safety

- **Risk impact:** Moderate risk impact
- **Risk likelihood:** Moderate risk likelihood

### Analysis details

- Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
- This extension has low user count. Unpopular extensions may not be stable or safe.

> Some risk analysis details are omitted from this free response. [Upgrade to view the full analysis](https://chrome-stats.com/pricing).

## Similar extensions and apps

- [JSON Formatter](https://chrome-stats.com/d/json-formatter-json) — 1 users
- [JSON Viewer Pro By PatilWeb](https://chrome-stats.com/d/json-viewer-pro-by-patilweb) — 11 users, 2.00 / 5
- [JSON Editor](https://chrome-stats.com/d/browser-json-editor) — 22 users, 2.00 / 5
- [JSON Beautifier & Editor](https://chrome-stats.com/d/json-beautifier-editor) — 645 users, 3.71 / 5
- [JSON\[B\] Viewer](https://chrome-stats.com/d/jsonb) — 11 users, 4.00 / 5
- [JSON Editor](https://chrome-stats.com/d/json-editor-ex) — 332 users, 4.33 / 5
- [JsonTidy Box](https://chrome-stats.com/d/jsontidy-box)
- [JSON Formatter](https://chrome-stats.com/d/json-formatter76)
- [JSON-Tool](https://chrome-stats.com/d/json-tool) — 2 users
- [JSON Formatter + Viewer](https://chrome-stats.com/d/json-formatter-viewer) — 30 users
- [JSON Validator](https://chrome-stats.com/d/json-validator) — 1 users
- [JSON directly](https://chrome-stats.com/d/json-directly)

---

Source: [Chrome-Stats](https://chrome-stats.com/d/json-input-check)