# Drop CSV Viewer

> Drag a CSV file onto any page to open it as a clean table in a new tab. Filter, sort, resize and export. 100% local and open source.

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

## Overview

- **ID:** `drop-csv-viewer`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** soyasis
- **Category:** web-development
- **Daily users:** 1
- **Version:** 1.4.1
- **Last updated:** 2026-07-02
- **First published:** 2026-06-16
- **Size:** 22 KB
- **Data as of:** 2026-09-06
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/drop-csv-viewer/)
- **Website:** [https://github.com/soyasis/drop-csv-viewer](https://github.com/soyasis/drop-csv-viewer)

## Description

Read local CSV and TSV files without links or a spreadsheet app.

<strong>Just drop it in</strong>
Drag a .csv or .tsv onto any open Firefox tab and it opens as a clean table in a new tab. No URL, no upload, no "open file" dialog, no Excel.

<strong>Features</strong>
- Type to filter across all columns
- Click the ▼ next to a column to sort (numbers sort as numbers)
- See live Sum, Average, Min, Max, Count and Unique
- Copy any selection with ⌘/Ctrl-C to paste straight into Sheets or Excel
- Drag a column's right edge to resize; sticky header and first column
- Download the current view (filter + sort applied) back to CSV

<strong>Private by design</strong>
- 100% local: no network requests, no analytics, no data collection
- Open source (MIT) — read every line on GitHub
- Light &amp; dark, follows your system theme (or toggle it)

## Rankings

- #99,589 — Overall
- #81 — drop
- #188 — spreadsheet

## Permissions and access

### Permissions

- `webNavigation`
- `file:///*`
- `*://*/*`

### Content script matches

- `*`
- ``

## Safety

- **Risk impact:** High risk impact
- **Risk likelihood:** High 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).

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