The short answer
The best Chrome extension project ideas for a portfolio use a modern Manifest V3 feature and solve one real annoyance you can ship to the store. A side panel tool or a rebuild of a stale favourite shows more skill than another to-do list. Shipping it publicly, even to 50 users, is what makes it count.
- A shipped extension beats a GitHub-only demo.
- Nearly every extension in our crawl uses Manifest V3 (61,788 of 61,820).
- 5,771 extensions asked for the side panel permission; 3,542 were first published in the past year.
- Rebuilding a stale, popular tool is a strong story for a portfolio.
The best chrome extension project ideas fix a real problem. Reviewers have seen a hundred to-do list extensions. They remember the one that fixed a real problem and had a store link.
What makes a portfolio project stand out
Three things, roughly in order of weight. Not sure what to build yet? Start with our guide to finding Chrome extension ideas.
It ships. A store listing proves you got through Google's review with a real package. Registering a developer account costs a one-time $5 fee, per Google's registration docs.
It uses current APIs. Manifest V2 is gone from the store. In our crawl of 61,820 extensions, only 2 still reported Manifest V2 as of 3 Oct 2026, and both had under 10K users. Build on Manifest V3 and say so.
It solves something. "Built a timer" is a tutorial. "Built a tool that exports LinkedIn job posts to a spreadsheet" is a story.
Eight chrome extension project ideas, with a reality check
| Project | Skill it shows | Store check, 3 Oct 2026 |
|---|---|---|
| Side panel reading notes | sidePanel API, storage sync | 5,771 extensions request sidePanel; 616 have 10K+ users |
| JSON viewer for huge files | Streaming parse, performance | JSONVue: 900K users, no update in 1,039 days |
| Accessible color picker | EyeDropper API, contrast math | 7 of 23 big color pickers not updated in 2+ years |
| Page table to CSV exporter | Content scripts, DOM parsing | Narrow, low competition per site |
| Tab manager with search | tabs and tabGroups APIs | Tab Manager Plus: 200K users, 731 days since update |
| YouTube transcript to notes | Content scripts, text cleanup | 155 transcript-named tools, 24 with 10K+ users |
| Font identifier | Computed styles, overlays | WhatFont: 3M users, 943 days since update |
| Cookie banner auto-decliner | declarativeNetRequest, rules | 19 of 54 big cookie tools stale 2+ years |
User counts are the store's rounded figures. "Days since update" uses the update date on the listing.
You can check these figures yourself on the tab managers page.
Why rebuilding a stale tool is a smart move
Look at JSONVue in that table. 900K users, a 4.54 lifetime rating, and no update for nearly three years when we checked. That's a well-loved tool nobody is moving forward.
A rebuild like that gives you a clear before and after. You can name the gap in your write-up, then explain what yours adds. That reads as product thinking, not just coding.
Rebuild a popular stale tool, then explain the one thing you changed.
Scope it so you actually finish
Portfolio projects die at 70%. Keep the first version tiny.
- One screenA popup or a side panel, not both.
- One permission setAsk only for what the feature needs. Fewer permissions also means faster review.
- One siteMake it work on one website before you generalise.
- One weekIf the plan doesn't fit a week of evenings, cut a feature.
Say you pick the CSV exporter. Week one supports one site's tables. Week two adds a second site. That second site is where you learn how fragile selectors are, and that lesson is worth writing up.
Show the numbers you earned
Once it's live, note the dates. Users and ratings are evidence a reviewer can check for themselves, on a page you don't control, which is exactly why they carry weight. Even "42 weekly users after a month" is honest and concrete.
We're biased, since Ext Watch is our product, but you can look up your own listing there to see users and rating with the date we last saw them. It's handy for a portfolio page that stays truthful.
For more starting points, see ideas you can build this weekend and uncrowded browser extension ideas.
Pick the stale tool you'd use yourself. Then give it the update it's been missing.
Questions people ask
What's a good first Chrome extension project?
A small tool for a site you use daily, with one screen and few permissions. A table exporter or a side panel notes tool are both good starts.
Do you need to publish it to the Chrome Web Store?
It isn't required, but a live listing proves you handled review and packaging. That counts for a lot in a portfolio.
Should you use Manifest V3?
Yes. Almost every extension in our crawl reports Manifest V3, and new submissions need it.
Where these numbers come from
- developer.chrome.comRegister your developer accountAccessed 3 Oct 2026
- developer.chrome.comWhat is Manifest V3Accessed 3 Oct 2026
Part of our guide: What Is Micro SaaS? A Plain Guide With Real Examples. More in Extension ideas.
352 extensions tracked in Tab managers. See them all.
Real demand, weak competition, with the numbers behind each one. Updated 3 Oct 2026 from our Chrome Web Store crawl
