20 Chrome Extensions Every Developer Needs (2026)
I have 23 Chrome extensions installed. Most developers I know have 30+. The problem isn’t finding extensions — it’s finding the ones actually worth the memory overhead.
Here are 20 that survived my quarterly purge. Every single one gets used at least weekly.
AI & Productivity
1. Perplexity Browser Companion
Search any highlighted text with Perplexity instantly. Right-click, “Ask Perplexity,” and get a cited answer in a sidebar without leaving the page. Replaced my habit of opening new tabs for quick questions.
Why keep it: Saves 2-3 minutes per search. Over a workday, that’s 30+ minutes.
2. Claude for Chrome
Anthropic’s official extension. Summarize any webpage, ask questions about page content, and get help with code on GitHub PRs — all from a sidebar panel.
Why keep it: The “explain this PR” feature alone justifies installation.
3. Raycast Browser Extension
If you use Raycast on Mac, this connects your browser to your Raycast workflows. Quick links, clipboard history, and AI commands that know your browser context.
Why keep it: Unified workflow between browser and desktop.
4. daily.dev
Turns your new tab page into a personalized developer news feed. Sources from Hacker News, Dev.to, GitHub Trending, and tech blogs. AI-ranked by your interests.
Why keep it: I discover 2-3 useful tools or articles per week without actively searching.
5. Merlin AI
ChatGPT/Claude on any website. Summarize YouTube videos, compose emails, explain code — all via keyboard shortcut. Works on every webpage.
Why keep it: The YouTube video summary feature saves hours of watching tutorials.
GitHub & Code
6. Refined GitHub
Adds dozens of quality-of-life improvements to GitHub: one-click PR approval, file tree in repos, comment reactions, collapsible sections, and more. Over 100 small enhancements that GitHub should have built-in.
Why keep it: GitHub without Refined GitHub feels broken now.
7. GitHub File Icons
Replaces generic file icons in GitHub repos with language-specific icons. Tiny change, massive readability improvement when browsing repos.
Why keep it: Visual scanning speed increases noticeably.
8. OctoTree
Adds a file tree sidebar to GitHub repositories. Navigate large repos without clicking through folders endlessly.
Why keep it: Essential for exploring unfamiliar codebases on GitHub.
9. GitLens for Web (GitKraken)
Brings GitLens-style blame annotations to GitHub’s web UI. Hover over any line to see who changed it, when, and why.
Why keep it: Code archaeology without cloning the repo.
Debugging & Testing
10. React Developer Tools
The official React debugging extension. Component tree, props/state inspection, performance profiling. If you write React, this is mandatory.
Why keep it: Props debugging alone saves hours per week.
11. Vue.js Devtools
Same concept as React DevTools but for Vue. Component inspector, Vuex/Pinia state management, event tracking.
Why keep it: Vue without devtools is like debugging blindfolded.
12. Lighthouse
Google’s built-in performance auditing tool. One click to measure performance, accessibility, SEO, and best practices. Generates actionable reports.
Why keep it: Quick performance checks before deploying. Catches accessibility issues I’d otherwise miss.
13. Web Vitals
Shows Core Web Vitals (LCP, FID, CLS) in real-time as you browse. A tiny overlay in the corner tells you if a page passes Google’s performance thresholds.
Why keep it: Instant performance feedback during development without opening DevTools.
14. Wappalyzer
Identifies the tech stack of any website you visit. Framework, CMS, analytics, CDN, hosting — all visible in one click. Perfect for competitive research or satisfying curiosity.
Why keep it: “What’s this site built with?” answered in one click instead of 10 minutes of inspecting source.
Data & APIs
15. JSON Viewer Pro
Formats raw JSON responses in the browser with syntax highlighting, collapsible sections, and search. Makes API debugging significantly faster.
Why keep it: API response inspection without switching to Postman.
16. ModHeader
Modify HTTP request/response headers on the fly. Essential for testing CORS, authentication, caching, and custom headers without touching server code.
Why keep it: CORS debugging goes from 30 minutes to 30 seconds.
17. Requestly
Redirect URLs, modify headers, inject scripts, delay responses, and mock APIs — all from the browser. Powerful for testing edge cases without modifying backend code.
Why keep it: API mocking during frontend development. Test error states without breaking the backend.
Design & CSS
18. VisBug
A Chrome extension that lets you visually edit any webpage. Drag elements, change colors, adjust spacing, edit text — all visually. Built by a Google Chrome engineer.
Why keep it: Quick CSS experiments without opening DevTools. Great for showing design changes to non-technical stakeholders.
19. ColorZilla
Advanced color picker for the web. Pick colors from any webpage, generate CSS gradients, and analyze page color palettes. Includes eyedropper that works on any element.
Why keep it: Grabbing exact hex codes from designs and competitor sites.
Privacy & Security
20. uBlock Origin
Not just an ad blocker — it’s a wide-spectrum content blocker that reduces page load times, blocks trackers, and cleans up the web. Lower memory usage than alternatives.
Why keep it: The web is unusable without it. Pages load 2-3x faster. Blocks tracking scripts that slow down development.
The Extensions I Removed (And Why)
Extensions I used to recommend but cut in 2026:
- Grammarly — Claude and ChatGPT handle writing assistance better now
- Honey — Acquired by PayPal, became bloated with tracking
- Momentum — Nice new tab page but daily.dev is more useful
- Tab Manager Plus — Built-in Chrome tab groups made this redundant
- LastPass — Switched to 1Password after the security breaches
Performance Impact
I measured the memory impact of all 20 extensions:
- Total memory overhead: ~180MB (acceptable on 16GB+ machines)
- Heaviest: React DevTools (~25MB), Merlin AI (~20MB)
- Lightest: GitHub File Icons (~2MB), Web Vitals (~3MB)
Pro tip: Disable extensions on sites where they’re not needed. Chrome lets you set site-specific permissions for each extension.
How to Manage Extension Overload
- Quarterly purge. If you haven’t used an extension in 3 months, delete it.
- Group by context. Use Chrome profiles — one for development (all dev extensions), one for personal browsing (minimal extensions).
- Pin only essentials. Keep 3-4 pinned in the toolbar. Everything else goes behind the puzzle piece icon.
- Watch for duplicates. Don’t run Grammarly + LanguageTool + Claude for Chrome all at once. Pick one.
Keep reading:
Frequently Asked Questions
What are some essential Chrome extensions for developers?
There are several essential Chrome extensions for developers, including those for AI and productivity, GitHub and code, debugging and testing, data and APIs, design and CSS, and privacy and security.
How can I manage Chrome extension overload?
To manage Chrome extension overload, use a quarterly purge, group extensions by context, pin only essentials, and watch for duplicates to minimize memory usage and optimize performance.
What is the memory impact of using multiple Chrome extensions?
The total memory overhead of using multiple Chrome extensions can be around 180MB, with some extensions like React DevTools and Merlin AI using more memory than others like GitHub File Icons and Web Vitals.
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