# CSV Viewer - zero-permissions no-network

> Securely view CSV files as formatted tables. Drag and drop or browse -- all processing happens locally with ZERO permissions and ZERO network calls. I built this to show CSV files in my browser tab without risking exposing the data to unknown risk

Canonical page: [https://chrome-stats.com/d/csv-viewer-zero-permissions](https://chrome-stats.com/d/csv-viewer-zero-permissions)

## Overview

- **ID:** `csv-viewer-zero-permissions`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Chris
- **Category:** other
- **Daily users:** 1
- **Version:** 3.3
- **Last updated:** 2026-03-07
- **First published:** 2026-03-04
- **Size:** 20 KB
- **Data as of:** 2026-09-11
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/csv-viewer-zero-permissions/)

## Description

A lightweight CSV viewer that runs entirely in your browser. Click the toolbar icon, drop a CSV file (or click to browse), and instantly see your data as a clean, readable table.

<strong>How it works</strong>
<ol><li>Click the CSV Viewer icon in your toolbar</li><li>Drag a CSV file onto the page, or click "Choose File"</li><li>Your CSV is parsed and displayed as a styled table</li></ol>
<strong>Security</strong>
<ul><li>Requests zero browser permissions</li><li>Makes no network requests of any kind</li><li>No external scripts, CDNs, or third-party libraries</li><li>No data collection, no tracking, no storage</li><li>Files are read locally using the browser's FileReader API and never leave your machine</li><li>All cell data rendered via textContent to prevent injection</li></ul>
<strong>Features</strong>
<ul><li>Drag-and-drop or file picker</li><li>First row displayed as a styled header</li><li>Alternating row colors and hover highlighting</li><li>Horizontal scroll for wide tables</li><li>Shows up to 200 rows with a count notice for larger files</li><li>Tab title set to the filename</li><li>"Open another file" button to quickly switch files</li></ul>

## Rankings

- #126,169 — Overall
- #41 — permissions
- #60 — permission
- #110 — network
- #248 — mission

## Safety

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

### Analysis details

- This permission has no access or impact on the user's system or data, thus carrying no risk.
- 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/csv-viewer-zero-permissions)