Browser extensions starting with J

JSON Formatter embeds a GiveFreely affiliate tracking library that monitors shopping browsing and sends search result URLs across all websites.

This extension adds calendar integrations for scheduling meet.jit.si video meetings.

Displays JSON responses in a formatted, validated view in Chrome.

Formats JSON and JSONP in Chrome with syntax highlighting and collapsible nodes.

Capture browser screenshots and recordings with technical context for bug reports and feedback.

Automatically finds cash back offers, promo codes, discounts, and price drops while you shop online.

Turns web articles into a customizable, distraction-reduced reader view.

JSON Viewer renders URL values from JSON pages into link attributes without escaping the URL.

Displays JSON documents as an editable tree view in the browser.

Formats JSON documents in the browser with highlighting and collapsible arrays and objects.

Jabra ChromeHost relays arbitrary web page messages to a native host controlling Jabra device state, without origin validation.

Save web pages and screenshots to Joplin while browsing.

Adds Jasper AI writing and editing tools inside common marketing and content platforms.

Blocks ads, popups, trackers, suspicious redirects, and unsafe sites while you browse.

Replaces YouTube thumbnails with images of Jambo and other cat-themed pictures.

JSON Formatter injects a content script into every page to detect and pretty-print raw JSON, and the current version contains no network or analytics code.

Track work hours from the browser with clock in/out, timers, and task or project logging.

JustCall injects its content script into any page whose URL merely contains one of ~260 CRM domain names anywhere in the string.

JavaScript-Java Bridge relays messages between webpages and locally installed Java programs via native messaging, with no validation of which Java host a page may connect to.

Jabra Device Connector exposes a native messaging bridge to the Jabra SDK app that any web page can invoke without origin restrictions.

Join dispatches remote-control commands received via push notification through eval() with no signature check.

Joko transmits full merchant page URLs and shopping events with persistent user and device IDs to its servers and Amplitude.

The javascript extension lets users store custom JavaScript per domain and injects it into every page on that domain on each navigation.

J7Extension captures Axiom tracked-wallet and own-wallet details for its local highlighting panel.

JDM Cars Wallpaper New Tab sends new-tab search queries to tabssearch.com.

JSON Formatter sends the current JSON page URL to jsonlint.com when its JSONLint button is clicked.

JSON Formatter Pro reads JSON page contents and URLs to keep a local sidebar history.

JSON格式化工具 can capture the active tab as an EPUB and upload it to the configured reMarkable cloud API.

JSTorrent Helper extension sends selected magnet and torrent links, plus the current page URL, to the JSTorrent Chrome app.

JWT Inspector reads Authorization bearer JWTs in DevTools and displays their decoded contents locally.

JabRef Browser Extension fetches translator scripts from repo.zotero.org and executes them in active tabs without integrity checks.

JavaScript-Java Bridge connects web pages on user-allowlisted sites to locally-installed native messaging hosts via a postMessage relay.

Jazz-MIDI exposes a native MIDI host to any website via a CustomEvent bridge with no origin filtering.

JetBrains Grazie Writing Companion sends text typed into web page fields to JetBrains' AI backend for grammar and completion suggestions.

Jira Product Discovery sends selected page text, screenshots, and page details to the Jira site you choose.

JoomPulse forwards intercepted Shopee marketplace API responses to joompulse.com.

JustAnswer sends the host and path of every page you visit to Google Analytics.

Popify - Youtube Themes & Customizers injects uploaded local images as readable data URLs into YouTube pages.

Japanese Dictionary JP creates ezse.net grade links containing transcript and grade-table data from student pages.

Joxi runs hotkey listeners on every website and uses Joxi token requests for sign-in and refresh flows.

Juicy Coupon sends supported shopping domains you visit to coupon-now.com for coupon lookup.

JSX Preview loads preview-engine libraries from esm.sh and can add Tailwind's CDN while rendering JSX.

JanitorAI Chat Downloader, Reader & Exporter captures JanitorAI chat responses so users can export them locally.

JunkFill fills forms on the active page with locally stored custom values when the user clicks its toolbar button.

JSON Formatter Pro loads Google-hosted fonts when its popup opens.

Jarvis sends the Chrome profile email address to Google Analytics during install and telemetry events.

JobOwl sends the visible text from the active tab and its frames to api.jobowl.co when generating resumes or cover letters.

Juicy - Amazon Coupons Finder sends Amazon search terms and coupon product listings to analytics and Juicy Discount servers.

1-2-3 Kupovina s Jeftinije.hr posts search queries, page URLs, and visible result metadata to jeftinije.hr.

JP English Dictionary sends hovered or selected page text to the configured translation provider.

Jiminny Sidekick sends selected phone numbers and CRM record identifiers to the Jiminny phone controller.