Manifest V3 · Local-first · Commercial license

154 Extension Foundations.
Nothing Leaves
The Browser.

Purpose-built Manifest V3 starters for developers and agencies. Read every line before you ship it, brand it, and publish it under your own name.

No network calls, no analytics, no accounts — enforced by an automated check on every release. Protected source ZIPs, license-key activation, and a clear commercial licence.

Download a free template

Buying asks for immediate delivery, which ends the withdrawal period. Terms of Service · Refund Policy

One-time payment · lifetime updates Stripe checkout · no subscription Free sample: Copy Clean Link, no email required 154 shipped, including every one of the 70 researched roadmap ideas

Chrome Web Store acceptance is always determined by Google's review.

{

"manifest_version": 3,

"name": "Copy Clean Link",

"version": "1.0.0",

"action": {

"default_popup": "popup.html"

"permissions": [

"activeTab", "clipboardWrite"

]

}

▲ No host_permissions. Nothing runs until you click.

Honest by design

verified every release

154 shippedEvery template in the catalogue downloads today. None is pending.
Network-freeNo fetch, no beacons, no remote scripts. Enforced automatically on every release.
activeTab + scriptingActs only on the tab you clicked, with no site-specific selectors. The few needing wider access say so on their card.
No cloud AI, no keysNo template calls a model or ships an API key, and none leans on a fragile scraper.

Build with AI is a separate tool, not part of the vault. It generates an extension we did not write, from your own model key. The release check above does not cover it, because a model wrote that code rather than us. Read it before you install it. Open Build with AI

From ZIP to working extension

Four steps, about five minutes

Download the ZIP, unzip it, load it in Chrome with Developer mode, pin it. No installer, no build tools, no account. The full walkthrough has a picture for every step.

See how it works

Nothing leaves the browser

Peace of mind you can verify, not just read

No server behind them, nothing to sign in to, nothing to phone home to. You get the full source, so you never have to take our word for it.

No network code, enforced

Checked automatically across all 154 templates on every release. If the check fails, the release does not ship.

fetch()
XMLHttpRequest
WebSocket
sendBeacon
remote scripts

Plus: no host permissions on any template meant for publishing.

Every line is readable

Each ZIP is a handful of plain files. No build step, no bundle, no dependency tree.

manifest.json
popup
logic
README
store listing
privacy guidance

Twelve are open to inspect before you pay, and the free sample is the real package.

Verify it yourself in 30 seconds

Unzip the free sample and search it for network calls. The result is empty.

$ grep -rEl "fetch\(|XMLHttpRequest|WebSocket|sendBeacon" copy-clean-link/# no output — nothing to find

This describes the 154 pre-built templates exactly as we ship them. This website itself keeps your purchase email and license record so we can deliver and recover your key (see the Privacy Policy), and its Build with AI page sends what you type there to the model provider whose key you paste. What you add to a template after that is up to you, and the included privacy guidance shows how to disclose it.

Six distinct browser-work categories

Every template has one clear job

Tabs, Reading & Focus

Save sessions, review duplicates, snooze, remind, label, export, queue & launch workspaces.

20 templates

Links, Text & Writing

Clean, track, inspect, extract, clip, transform, format & compare text and links.

16 templates

Privacy, Safety & Security

Generate, inspect, redact, clear, map, hide & sanitize local browser content.

20 templates

SEO, Content & Accessibility

Inspect metadata, audit images, map headings, classify links & quick-check common issues.

13 templates

Developer & Design Inspection

View JSON, copy styles, inspect fonts, check contrast, explore variables & inventory assets.

32 templates

Capture, Data & Navigation

Export tables/lists/forms, capture regions, measure UI, focus reading & navigate landmarks.

20 templates

Reading & Research

Cite, audit, outline, compare and keep track of what you read, all on your device.

10 templates

Accessibility

Read aloud, navigate by keyboard, enlarge, simplify and check pages for real people.

10 templates

Commerce & Work

Snippets, checklists, calculators and small tools for support, sales and operations.

11 templates

Delight

Focus sound, small rituals and playful tools that make the browser nicer to live in.

2 templates

Catalog · 154 templates

Inspect before you buy

Buying asks for immediate delivery, which ends the withdrawal period. Terms of Service · Refund Policy

Showing 12 of 154 · two from each category · all 12 open to inspect

#1 · TabsAvailable

Tab Workspace & Session Saver

Saves named tab sets and restores a selected workspace.

Save this window

No workspaces saved yet. Press Save to capture this window.Working…Saved "Workspace 9/7/2026, 10:34:49 PM" with 4 tabs.Workspace 9/7/2026, 10:34:49 PM · 4 tabsRestoreDelete

Runs on your device only. Nothing is sent anywhere.

Tab Workspace & Session Saver

Saves named tab sets and restores a selected workspace.

tabsstorage

Low-risk publish

Setup: None

#2 · TabsAvailable

Duplicate Tab Review & Cleanup

Finds exact duplicate URLs, excludes pinned tabs, and requires confirmation before closing.

Run

Working…Closed 1 duplicates.

Runs on your device only. Nothing is sent anywhere.

Duplicate Tab Review & Cleanup

Finds exact duplicate URLs, excludes pinned tabs, and requires confirmation before closing.

tabs

Low-risk publish

Setup: None

#9 · Links Free sample

Copy Clean Link

Removes recognized tracking parameters from current URL and copies the clean version.

Run

Removed 3 tracker(s). Clean link copied:
http://demo.localhost/guides/cold-brew

Runs on your device only. Nothing is sent anywhere.

Copy Clean Link

Removes recognized tracking parameters from current URL and copies the clean version.

activeTabclipboardWrite

Low-risk publish

Setup: None

Free ZIP

#10 · LinksAvailable

UTM Campaign Builder

Builds campaign URLs from your parameters, validates them, and copies the result.

Destination URLhttps://example.com/utm_sourcenewsletter

Run

Campaign URL copied:
https://example.com/?utm_source=newsletter&utm_medium=email&utm_campaign=launch

Runs on your device only. Nothing is sent anywhere.

UTM Campaign Builder

Builds campaign URLs from your parameters, validates them, and copies the result.

tabsclipboardWrite

Low-risk publish

Setup: None

#17 · PrivacyAvailable

Secure Password Generator & Entropy Meter

Generates passwords locally using Web Crypto and explains entropy/strength.

Password length20

Run

Password copied:
%^LZq!3%uuB!E%ELRueZ

Entropy ≈ 120 bits (excellent)

Runs on your device only. Nothing is sent anywhere.

Secure Password Generator & Entropy Meter

Generates passwords locally using Web Crypto and explains entropy/strength.

clipboardWrite

Low-risk publish

Setup: None

#19 · PrivacyAvailable

URL Parameter Inspector

Lists all query parameters and lets users selectively remove/copy clean URLs.

Run

Parameters:
utm_source = newsletter
utm_medium = email
fbclid = IwAR2xQ9

Parameter-free URL copied to clipboard.

Runs on your device only. Nothing is sent anywhere.

URL Parameter Inspector

Lists all query parameters and lets users selectively remove/copy clean URLs.

activeTabclipboardWrite

Low-risk publish

Setup: None

#25 · SEOAvailable

On-Page SEO Meta Inspector

Shows title, description, canonical, robots, Open Graph, Twitter cards, and headings.

Run

{
  "canonical": "http://demo.localhost/guides/cold-brew",
  "description": "A practical guide to brewing cold brew at home, with equipment costs, ratios and a comparison of the four methods we tested over eight weeks.",
  "h1": [
    "Cold Brew at Home: The 2026 Equipment Guide"
  ],
  "og": "Cold Brew at Home: The 2026 Equipment Guide",
  "robots": "index, follow",
  "title": "Cold Brew at Home: The 2026 Equipment

Runs on your device only. Nothing is sent anywhere.

On-Page SEO Meta Inspector

Shows title, description, canonical, robots, Open Graph, Twitter cards, and headings.

activeTab

Low-risk publish

Setup: None

#32 · SEOAvailable

Accessibility Quick Check

Flags basic visible issues: missing alt text, empty links/buttons, heading skips, missing labels.

Run

Images without alt: 2
Empty links: 0
Inputs without label: 0
H1 count: 1 ✓

Runs on your device only. Nothing is sent anywhere.

Accessibility Quick Check

Flags basic visible issues: missing alt text, empty links/buttons, heading skips, missing labels.

activeTab

Low-risk publish

Setup: None

#33 · Developer & Design InspectionAvailable

JSON Viewer & Collapsible Tree Explorer

Formats JSON pages with folding, search, path copy, pretty/minify, and error location.

Run

{
  "orders": [
    {
      "id": "HC-4821",
      "customer": "Dana Whitfield",
      "total": 46.5,
      "currency": "USD",
      "items": [
        {
          "sku": "CARAFE-14",
          "qty": 1
        }
      ]
    },
    {
      "id": "HC-4822",
      "customer": "Sam Okafor",
      "total": 18,
      "currency": "USD",
      "items": [
        {
          "sku": "JAR-1L",
          "qty": 2
        }

Runs on your device only. Nothing is sent anywhere.

JSON Viewer & Collapsible Tree Explorer

Formats JSON pages with folding, search, path copy, pretty/minify, and error location.

activeTab

Low-risk publish

Setup: None

#36 · Developer & Design InspectionAvailable

Color Contrast Sampler

Samples foreground/background colors and calculates local contrast ratios.

Run

Foreground: rgb(31, 41, 55)
Background: rgb(255, 255, 255)
Contrast ratio: 14.68:1  ✓ AA

Runs on your device only. Nothing is sent anywhere.

Color Contrast Sampler

Samples foreground/background colors and calculates local contrast ratios.

activeTabclipboardWrite

Low-risk publish

Setup: None

#41 · CaptureAvailable

HTML Table to CSV/JSON Exporter

Detects a visible table and exports structured rows as CSV or JSON.

Export CSVExport JSON

Exported 5 rows → table.csvExported 4 records → table.json

Runs on your device only. Nothing is sent anywhere.

HTML Table to CSV/JSON Exporter

Detects a visible table and exports structured rows as CSV or JSON.

activeTabdownloads

Private / internal

Setup: None

#44 · CaptureAvailable

Visible-Region Screenshot Capture

Captures the visible area of the current tab as a PNG and saves it with Chrome's downloader.

Run

Working…Captured visible tab → screenshot.png

Runs on your device only. Nothing is sent anywhere.

Visible-Region Screenshot Capture

Captures the visible area of the current tab as a PNG and saves it with Chrome's downloader.

activeTabdownloads

Low-risk publish

Setup: None

12 open to inspect · 142 shown locked until you unlock the vault

Roadmap · included in every license

The 70-item roadmap is fully shipped

These were researched and ranked separately from the launch library, then built in order. Every one is in the catalog above and included at no extra cost, for buyers who bought before they existed too.

1Brown Noise Focus TimerDelight · medium buildshipped
2Quote Deep Link MakerLinks & Text · small buildshipped
3Read Aloud SpeakerAccessibility · medium buildshipped
4dataLayer Event ViewerDeveloper & Design · medium buildshipped
5Bug Report SnapshotCapture & Data · small buildshipped
6Cite This PageReading & Research · medium buildshipped
7Draft Rescue AutosaveLinks & Text · medium buildshipped
8Everything SwitcherTabs & Focus · medium buildshipped
9Link Hint JumperAccessibility · medium buildshipped
10Live Copy MockupDeveloper & Design · medium buildshipped
11Markdown to Rich Text PasterLinks & Text · medium buildshipped
12Marketing Tag DetectorDeveloper & Design · medium buildshipped
13Screen-Share Spotlight CurtainPrivacy & Safety · medium buildshipped
14Select-to-Sum CalculatorCapture & Data · small buildshipped
15Snippet Library & InserterCommerce & Work · medium buildshipped
16Social Share Card PreviewerSEO & Content · medium buildshipped
17Test Data Form FillerDeveloper & Design · medium buildshipped
18Click Blocker FinderDeveloper & Design · small buildshipped
19Closed Tab RecallTabs & Focus · small buildshipped
20Competitor Audit Side PanelReading & Research · medium buildshipped
21Console & Error RecorderDeveloper & Design · medium buildshipped
22Environment Badge & GrouperDeveloper & Design · small buildshipped
23Idle-Aware Time TrackerCommerce & Work · medium buildshipped
24Omnibox Alias LauncherTabs & Focus · small buildshipped
25Panic & Idle SweeperTabs & Focus · medium buildshipped
26Per-Site Data WiperPrivacy & Safety · small buildshipped
27Pseudo-Localization SwitchDeveloper & Design · medium buildshipped
28QR Link RevealerCapture & Data · medium buildshipped
29Robots.txt Rule TesterSEO & Content · medium buildshipped
30Selection to Calendar EventCommerce & Work · small buildshipped
31Side-by-Side Compare PanelCommerce & Work · medium buildshipped
32Sprint Tab GroupTabs & Focus · medium buildshipped
33Tab GardenDelight · medium buildshipped
34Distraction Fence TimerTabs & Focus · medium buildshipped
35Download Provenance CheckPrivacy & Safety · medium buildshipped
36Element Isolation SandboxDeveloper & Design · large buildshipped
37Evidence LedgerReading & Research · medium buildshipped
38Idle Tab FreezerTabs & Focus · small buildshipped
39Invisible Character DetectorLinks & Text · medium buildshipped
40Keyword Placement HighlighterSEO & Content · medium buildshipped
41Leitner Flashcard DeckReading & Research · medium buildshipped
42Overflow Culprit FinderDeveloper & Design · small buildshipped
43Personal Glossary OverlayReading & Research · medium buildshipped
44Price Watch NotebookCommerce & Work · medium buildshipped
45Research ID ExtractorReading & Research · medium buildshipped
46Return & Warranty Window TrackerCommerce & Work · small buildshipped
47SERP Snippet Draft StudioSEO & Content · medium buildshipped
48Share Post ComposerLinks & Text · medium buildshipped
49Tab Budget GateTabs & Focus · small buildshipped
50Tab Order TracerAccessibility · medium buildshipped
51Tab Sort & Domain GrouperTabs & Focus · small buildshipped
52Tab Storage EditorDeveloper & Design · medium buildshipped
53Test Locator StudioDeveloper & Design · medium buildshipped
54UTM Consistency AuditorLinks & Text · medium buildshipped
55Unit Price RankerCommerce & Work · small buildshipped
56Vision Filter SwitchAccessibility · medium buildshipped
57Web Vitals HUDDeveloper & Design · medium buildshipped
58Animation Slow-Mo ControllerDeveloper & Design · medium buildshipped
59Global Leak DetectorDeveloper & Design · medium buildshipped
60Incognito HandoffTabs & Focus · small buildshipped
61Service Worker & Cache PanelDeveloper & Design · medium buildshipped
62Address Bar Truth CardPrivacy & Safety · small buildshipped
63Annotated Bibliography BuilderReading & Research · medium buildshipped
64Hreflang Set ValidatorSEO & Content · small buildshipped
65Script Trust AuditorDeveloper & Design · medium buildshipped
66Shoulder Surf ShieldPrivacy & Safety · small buildshipped
67Sponsored Link Compliance CheckerCommerce & Work · medium buildshipped
68Subject Line Preview LabCommerce & Work · small buildshipped
69Third-Party Domain CensusPrivacy & Safety · medium buildshipped
70Tracking Pixel FinderPrivacy & Safety · small buildshipped

Why not build it yourself?

You could build any of these. The vault is for not having to.

Doing one Manifest V3 extension properly is roughly a day of work: scoping permissions, writing the manifest, building the popup and its logic, testing it unpacked, then drafting the store listing and privacy notes.

154 of those is 154 days you don't spend on the part that is actually yours. The vault is $89, once.

~1 day: to build one from scratch
× 154: templates in the vault
$89: once · no subscription

Build
Load unpacked, wire your feature into a working popup, ship.
Brand
Rename, re-icon, and publish under your own developer account.
Deliver
Hand a client a working extension the same week, README included.
Publish
Derivatives are yours to release. The unmodified originals are the only thing you cannot resell.

One-time · Founder license

$89 once

Tax included: $89 is what you pay, wherever you are. Full vault access, every future library drop, and a perpetual commercial license. Pay once with Stripe, activate instantly with your license key.

Who is the license for?

Held by one named developer. Full commercial license: modify, brand, publish under your own name and use in client work. Same vault, same rights and same price either way.

By buying you agree to the Terms of Service and Refund Policy, and you ask for immediate delivery of your licence key and ZIP files — which ends any statutory withdrawal period for digital content. Our own 30 days refund terms still apply.

License key delivered instantly — shown on the confirmation page the moment Stripe confirms payment.
Lifetime updates — every future library drop is included. No subscription, nothing to renew.
Lost-key recovery — self-serve from the Recover page with your purchase email.
Checkout by Stripe — your card details go to Stripe, never to us.
Refunds — Refund requests within 30 days of purchase go through Stripe. If a purchase is fully refunded, its license key is revoked automatically. Full terms on the Refund Policy page. Refund Policy.

By paying you agree to the Terms of Service and Privacy Policy.

Chrome Web Store acceptance is always determined by Google's review.

Not sure yet? Try it free

Download Copy Clean Link — the complete template

Same files the vault ships for it: manifest, popup, logic, README. Load it unpacked, read the code, then decide about the other 153. No email required.

Download the free ZIP

All 154 templates as protected source ZIPs
Every future library drop, included
README, store-listing draft & privacy guidance per template
Publish derivatives under your own brand
Lost-key recovery & session-cookie access

Questions

Product	Region	Units
Widget Pro	North	1,204
Widget Lite	South	986
Gadget X	East	1,533
Bundle Kit	West	742

154 Extension Foundations.Nothing LeavesThe Browser.

Honest by design

Four steps, about five minutes

Peace of mind you can verify, not just read

No network code, enforced

Every line is readable

Verify it yourself in 30 seconds

Every template has one clear job

Tabs, Reading & Focus

Links, Text & Writing

Privacy, Safety & Security

SEO, Content & Accessibility

Developer & Design Inspection

Capture, Data & Navigation

Reading & Research

Accessibility

Commerce & Work

Delight

Inspect before you buy

Tab Workspace & Session Saver

Duplicate Tab Review & Cleanup

Copy Clean Link

UTM Campaign Builder

Secure Password Generator & Entropy Meter

URL Parameter Inspector

On-Page SEO Meta Inspector

Accessibility Quick Check

JSON Viewer & Collapsible Tree Explorer

Color Contrast Sampler

HTML Table to CSV/JSON Exporter

Visible-Region Screenshot Capture

The 70-item roadmap is fully shipped

You could build any of these. The vault is for not having to.

$89 once

Straight answers

Do I get the actual source code?

Is there a free sample?

Are all 154 templates available today?

Will my extension be approved by the Chrome Web Store?

Is there any cloud AI, tracking, or BYOK keys in the templates I buy?

What does the license allow?

What is the refund policy?

I lost my license key. Now what?

154 Extension Foundations.
Nothing Leaves
The Browser.