# HAR/JSON viewer

> Embedded HAR/JSON viewer. Visualizes HTTP Archive (HAR) files opened locally or online. Also features JSON tree view.

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

## Overview

- **ID:** `har-json-viewer`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Savr Goryaev
- **Category:** web-development
- **Daily users:** 615
- **Weekly downloads:** 4
- **Rating:** 5.00 / 5 (5 ratings)
- **Version:** 1.3.0
- **Last updated:** 2020-12-17
- **First published:** 2020-09-17
- **Size:** 140 KB
- **Data as of:** 2026-09-11
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/har-json-viewer/)

## Description

The HAR/JSON Viewer Chrome extension enables users to effortlessly visualize HTTP Archive (HAR) files opened locally or online. It features an embedded viewer that supports switching between three distinct views: the HAR formatted view, a structured JSON tree view, and the plain original file view. This flexibility allows developers and analysts to inspect network interactions, debug web traffic, and understand data structures in a user-friendly interface. The extension supports direct loading of HAR files, providing a streamlined experience without the need for external tools or uploads.

Ideal for web developers, QA engineers, and data analysts, HAR/JSON Viewer simplifies troubleshooting and analysis of HTTP communications by providing clear insights into requests and responses within the browser environment. Its integration into Chrome enhances productivity by making HAR data readily accessible and easily navigable.

## Rankings

- #4,416 — Overall
- #6 — json
- #13 — viewer
- #132 — song
- #213 — features

## Permissions and access

### Permissions

- `activeTab`

## Safety

- **Risk impact:** Very low risk impact
- **Risk likelihood:** Low risk likelihood

### Analysis details

- 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).

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