# Dev Toolbox

> Dev Toolbox provides quick offline access to various development tools.

Canonical page: [https://chrome-stats.com/d/dev-toolbox](https://chrome-stats.com/d/dev-toolbox)

## Overview

- **ID:** `dev-toolbox`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Chris Nanney
- **Category:** web-development
- **Daily users:** 9
- **Rating:** 5.00 / 5 (1 ratings)
- **Version:** 1.1.8
- **Last updated:** 2024-02-15
- **First published:** 2022-04-08
- **Size:** 12 MB
- **Data as of:** 2026-09-05
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/dev-toolbox/)
- **Website:** [https://github.com/cnanney/dev-toolbox](https://github.com/cnanney/dev-toolbox)

## Description

Dev Toolbox is a Firefox add-on that provides quick offline access to various development tools. It includes features like calculating hashes, encoding and decoding HTML, URI, and Base64, converting numbers between different bases, parsing and manipulating time formats, formatting and inspecting IPv4/CIDR addresses, and searching v13.1 emoji with quick copying. It runs entirely offline and only requires local storage permission to remember the last tool used and its input.

## Rankings

- #34,558 — Overall
- #135 — toolbar
- #200 — offline

## Permissions and access

### Permissions

- `storage`

## 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).

## Similar extensions and apps

- [Dev Toolkit — 440+ Developer Tools](https://chrome-stats.com/d/dev-toolkit-440-devtools) — 1 users
- [Toolibo - Developer Toolbox](https://chrome-stats.com/d/toolibo-developer)
- [DevBox](https://chrome-stats.com/d/devbox) — 8 users, 5.00 / 5
- [Coodde Tools](https://chrome-stats.com/d/coodde-tools) — 4 users
- [NexusLabs DevKit — 8+ Developer Tools](https://chrome-stats.com/d/nexuslabs-devkit-dev-tools)
- [Infinite Toolkit](https://chrome-stats.com/d/infinite-toolkit)
- [supertools-browser-toolkit](https://chrome-stats.com/d/supertools-browser-toolkit) — 2 users
- [99Tools: Web Developer Toolkit](https://chrome-stats.com/d/99tools-web-developer-toolkit)
- [StackOnlineTools: Your ultimate all-in-one toolbox](https://chrome-stats.com/d/stack-online-tools) — 1 users
- [Developer Toolkit](https://chrome-stats.com/d/%E5%BC%80%E5%8F%91%E8%80%85%E5%B7%A5%E5%85%B7%E5%8C%85) — 1 users
- [Ctool 程序开发常用工具](https://chrome-stats.com/d/ctool) — 531 users, 5.00 / 5
- [HailBytes Engineering Toolkit](https://chrome-stats.com/d/hailbytes-engineering-toolkit) — 1 users, 5.00 / 5

---

Source: [Chrome-Stats](https://chrome-stats.com/d/dev-toolbox)