Chrome Extension Development

Want a Chrome extension
built for you?

Tell us what it should do. We design it, build it, get it through Chrome Web Store review and keep it working after launch — including payments if you want to charge for it. You own the code and the listing.

0 live extensions
0 active users
4.6 average rating
817 reviews
0 paying subscribers

All of it our own work — live on the Chrome Web Store, installable in one click.

Sound familiar?

Most people who write to us are in one of these situations.

You have the idea, not the developer. You know exactly what the extension should do — you just need someone who can actually ship it.

Your extension stopped working. A Chrome update or an API change broke it, users are leaving reviews about it, and nobody is maintaining it.

The Web Store rejected you. You got the email, you are not sure which rule you broke, and resubmitting blindly is not working.

You want it to make money. Free users are fine, but you have no idea how to add accounts, limits and recurring payments without breaking things.

You started it yourself and got stuck. The prototype works on your machine, but shipping it to real users turned out to be a different job.

Nobody is finding it. The extension is live, it works, and it is getting almost no installs because nothing points people to it.

If one of these is you, tell us about it — we will tell you honestly whether we are the right people for it.

What we can build for you

From a single-purpose tool to a full product with paying users.

Your extension, built properly

Manifest V3, the permissions reviewers accept, the edge cases users hit. Need it on Firefox and Edge too? That is a build option, not a rewrite.

Charge money for it

Sign-in, free vs premium limits, checkout, renewals, failed-payment recovery. If you want your extension to earn, this is the part most people underestimate.

Chrome Web Store publishing

Listing, screenshots, privacy disclosures, permission justifications and the review process itself — including what to do when a submission gets rejected.

Somewhere to send people

A landing page that actually ranks, in as many languages as your market needs. An extension nobody can find does not get installed.

Why trust us with it

Anyone can write code. The risk is what happens after you pay for it.

Your submission will not be a guess

We have been through Chrome Web Store review 31 times — permission warnings, privacy requirements, single-purpose rules. We know which ones are negotiable and which ones get you removed.

We think past the launch day

Our own extensions pay our bills, so we think about the things that decide whether yours survives: retention, refunds, support load — not just shipping a build.

Your users will not be asked for passwords

Most of what we build runs entirely in the browser. Fewer permissions means easier review, fewer scary warnings on your listing and more people who actually install.

When it breaks, someone answers

Platforms tighten rules and APIs shift overnight — extensions break. We have handled exactly that on live products with thousands of daily users watching.

Everything we built and still run

Not case studies from years ago — every one of them is live right now.

Instagram Unfollow AI - Manage Unfollowers Effortlessly
Instagram Unfollow AI - Manage Unfollowers Eff 20,000 users · 4.4
WASendly – WhatsApp Contacts Extractor
WASendly – WhatsApp Contacts Extractor 5,000 users · 4.6
Followgap - Instagram Unfollowers Tracker & Unfollow Non-Followers
Followgap - Instagram Unfollowers Tracker & Un 2,000 users · 4.5
Instagram Follower Export Tool
Instagram Follower Export Tool 2,000 users · 4.5
ChatGPT Speed Booster
ChatGPT Speed Booster 2,000 users · 4.6
InkShot — Webpage Screenshot & Draw Tool
InkShot — Webpage Screenshot & Draw Tool 1,000 users · 5.0
WASendly – WhatsApp Bulk Message Sender
WASendly – WhatsApp Bulk Message Sender 1,000 users · 4.9
PromptJolt – AI Prompt Enhancer for ChatGPT, Claude & Gemini
PromptJolt – AI Prompt Enhancer for ChatGPT, C 720 users · 4.6
IGFollow AI - Auto Follow
IGFollow AI - Auto Follow 708 users · 4.8
Instagram Auto Follow
Instagram Auto Follow 708 users · 4.8
FeedRank – Instagram & TikTok Feed Sorter
FeedRank – Instagram & TikTok Feed Sorter 702 users · 4.5
Backly — Unfollower Tracker for Instagram
Backly — Unfollower Tracker for Instagram 652 users · 4.7
TikTok Unfollow AI - Mass & Auto Unfollow All, Everyone & Non-Followers
TikTok Unfollow AI - Mass & Auto Unfollow All, 469 users · 5.0
X Unfollow AI – Manage Your Twitter Following List
X Unfollow AI – Manage Your Twitter Following 440 users · 5.0
FollowStack – Instagram Toolkit for Desktop
FollowStack – Instagram Toolkit for Desktop 317 users · 4.5
Clickaroo - Mouse Effect Designer
Clickaroo - Mouse Effect Designer 314 users · 3.7
Extract AI – Email Extractor
Extract AI – Email Extractor 274 users · 5.0
Claude Speed Booster
Claude Speed Booster 214 users · 5.0
Numsift — Bulk WhatsApp Number Checker & Validator | Export to Excel
Numsift — Bulk WhatsApp Number Checker & Valid 201 users · 5.0
ChatPilot – ChatGPT Bulk Delete, Archive & Timestamps
ChatPilot – ChatGPT Bulk Delete, Archive & Tim 159 users · 5.0
Prompt Trove — Visual AI Image Prompts Gallery
Prompt Trove — Visual AI Image Prompts Gallery 158 users · 5.0
SignedRise - Professional Email Signature
SignedRise - Professional Email Signature 141 users · 5.0
ExportPal - Save & Export ChatGPT, Claude, Gemini to PDF & Word
ExportPal - Save & Export ChatGPT, Claude, Gem 130 users · 4.9
Detechtor AI - Website Technology Checker & Tech Stack Detector
Detechtor AI - Website Technology Checker & Te 125 users · 5.0
Clearbox — Bulk Chat & Message Deleter for Instagram
Clearbox — Bulk Chat & Message Deleter for Ins 104 users · 5.0
Crawlhive — SEO Audit, Site Crawler & Technical SEO
Crawlhive — SEO Audit, Site Crawler & Technica 83 users · 5.0
Araç Data Merkezi — Used Car Valuation & Damage Check for Sahibinden
Araç Data Merkezi — Used Car Valuation & Damag 15 users · 5.0

What happens after you write to us

No month of silence, no surprise invoice at the end.

01

We talk it through

What it should do, which sites it touches, what permissions that forces. Most ideas get simpler here — and cheaper. If it cannot pass review, you hear it now, not later.

02

You try it early

A working build you load in your own browser before the polish. Changing direction here costs a conversation. Changing it after launch costs a lot more.

03

We build the real thing

Interface, edge cases, error states, billing if you need it. You see it progress as it happens — no month of silence followed by a big reveal.

04

It goes live

Listing, assets, privacy disclosures and the submission — handled for you. If it gets rejected, fixing that is part of the job, not a new invoice.

05

You are not left alone with it

Browsers update, rules change, APIs move. We stay reachable for the part most agencies treat as someone else's problem once the invoice clears.

Before you write to us

The questions that come up in almost every first email.

How long does an extension take?

A focused single-purpose extension is usually a matter of weeks; one with accounts, subscriptions and a marketing site takes longer. Scope drives everything, so we would rather look at your idea than quote a number blindly.

How is pricing decided?

Per project, after we understand the scope. We will tell you honestly if what you want is simpler than you think — or if the Chrome Web Store will never approve it.

What if the Chrome Web Store rejects it?

It happens, even to well-built extensions. We read the rejection, fix the cause and resubmit. Having gone through review 31 times, we usually know the reason before the email finishes loading.

Who owns the code?

You do. The extension is published under your developer account and the source is yours.

Can you take over an existing extension?

Yes. Broken builds, Manifest V3 migrations and abandoned codebases are familiar territory.

Do you also handle the website and marketing side?

Yes — landing page, multilingual content and the SEO foundation underneath it. This site is the example.

Tell us what you want built

A few sentences is enough to start. We will tell you what it takes — and if we are not the right people for it, we will say that instead of selling you something.

Tell us your idea

Contact Us

contact@addonschrome.com