The best Chrome extensions for developers in 2026 start with AyeTab, a free toolbox of formatters, decoders and converters that opens on every new tab. After that, the right picks depend on your stack: React or Vue devtools, Redux DevTools for state, Wappalyzer for looking up how other sites are built, and ColorZilla for picking colours off a page.
How this list was ranked
The ranking favours extensions you open daily over ones you open once a quarter. Each pick was checked against its own Chrome Web Store page in October 2026, and the descriptions below stick to what those pages say. Fewer extensions is better: each one is code with access to your browser, so the list stops at six.
1. AyeTab: the everyday toolbox
AyeTab turns the new tab page into a developer workbench. The tool list sits on the left and the open tool on the right, and the same tools are available in Chrome's side panel. It covers the jobs that interrupt you most often: pretty-printing JSON, decoding a JWT, testing a regex, diffing two snippets, converting a Unix timestamp, generating a UUID or a SHA-256 hash, and turning a cURL command into fetch or Python code.
Why it ranks first: it is free, needs no account, and processes your input in the browser instead of uploading it. Ctrl+K or Cmd+K opens a command palette, and smart paste suggests a tool when you paste a token, a JSON blob, a Base64 string or a URL. It also works offline once installed.
2. React Developer Tools
This extension adds React debugging tools to Chrome DevTools. If you ship React, this is not optional.
3. Vue.js devtools
The Vue equivalent: a DevTools extension for debugging Vue.js applications. Install it instead of, or next to, the React one depending on your projects.
4. Redux DevTools
Shows the state changes in your application, so you can see what changed and when. Its store page notes that it also works with other architectures that handle state, not only Redux.
5. Wappalyzer
A technology profiler that shows what a website is built with. Useful when you are scoping a migration, checking a competitor or debugging a third-party embed.
6. ColorZilla
An eyedropper, colour picker and gradient generator. Handy when a designer hands you a live page instead of a design file.
At a glance
| Rank | Extension | Main job | Where you use it |
|---|---|---|---|
| 1 | AyeTab | Format, decode, convert and generate | New tab page and side panel |
| 2 | React Developer Tools | Debug React apps | Chrome DevTools |
| 3 | Vue.js devtools | Debug Vue.js apps | Chrome DevTools |
| 4 | Redux DevTools | Inspect state changes | Chrome DevTools |
| 5 | Wappalyzer | Identify the technology behind a site | Any page you visit |
| 6 | ColorZilla | Pick colours and build gradients | Any page you visit |
What did not make the list
Single-purpose JSON viewers, Base64 helpers and timestamp converters are left out on purpose. AyeTab covers those jobs in one install, which means one set of permissions to review instead of five. Lighthouse is also missing because it already runs from Chrome DevTools; you do not need an extension to audit performance or accessibility.
The honest trade-off
AyeTab does not look inside your running app. If most of your day is spent tracing props through a component tree, the framework devtools at numbers 2 and 3 will save you more time than any toolbox. The two kinds work together, and a lean setup has both. You can also try the AyeTab tools in a regular tab before installing anything.