Life & fun · alternatives · 2026

24 alternatives to AcrossTabs – Easy communication between cross-origin browser tabs

Easy communication between cross-origin browser tabs. Simplified "CORS"ing! - wingify/across-tabs

AcrossTabs enables communication between browser tabs that are open on different websites or origins. Launched in 2017, this tool solves the technical challenge of sharing data across tabs that would normally be… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. AcrossTabs – Easy communication between cross-origin browser tabs launched in 2017; newer entries below may have overtaken it.

1. 1
   across-tabs▲90

   Easily communicate among browser tabs

   2017 · engineering.wingify.com · its alternatives →

2. 2WI
   Will It CORS? – an automatic CORS explainer▲152

   Test CORS online with our free CORS tester. Check CORS on any URL for free.

   2020 · willitcors.com · its alternatives →

3. 3
   Tabl 1.0▲752

   A multi-player web browser

   2025 · its alternatives →

4. 4
   COLLABORATE By Sariska▲404

   Browse any website together without screen sharing

   2023 · kaostogel2d.com · its alternatives →

5. 5
   Reflect New Tab for Chrome ▲394

   Open new browser tabs to a dashboard of customizable widgets

   2024 · chromewebstore.google.com · its alternatives →

6. 6
   ChatGPT Atlas▲662

   The browser with ChatGPT built in

   2025 · openai.com · its alternatives →

7. 7OJ
   Offline JavaScript PubSub between browser tabs▲83

   2025 · simon-frey.com · its alternatives →

8. 8
   I saw this mind-blowing experiment, so I made a simple version of it▲403

   Two browser windows (acting as socket clients) communicate their: - Screen dimensions - (screen.width, screen.height) - Window dimensions - (window.innerWidth, window.innerHeight) - Window X/Y position - (window.screenX, window.screenY) ...or whichever calculation works best for you. The original work by Bjorn Staal https://twitter.com/_nonfigurativ_/status/172732259457002734 used localStorage, but I found sockets more fun, because if tweaked a bit, this can be shared with friends. Here's a demo of how it works and the codebase:…

   2023 · github.com · its alternatives →

9. 9
   Sametab▲152

   Share company announcements in your coworker's new tab

   2018 · pulseasync.com · its alternatives →

10. 10
    Tabbs▲334

    Better tab navigation for Chrome

    2020 · tabbs.pro · its alternatives →

11. 11
    Peek▲404

    Hey HN, My cofounder and I have gotten tired of CC ignoring our markdown files so we spent 4 days and built a plugin that automatically steers CC based on our previous sessions. The problem is usually post plan-mode. What we've tried: Heavily use plan mode (works great) CLAUDE.md, AGENTS.md, MEMORY.md Local context folder (upkeep is a pain) Cursor rules (for Cursor) claude-mem (OSS) -> does session continuity, not steering We use fusion search to find your CC steering corrections. - user prompt embeddings + bm25 - correction embeddings + bm25 - time decay - target query embeddings -…

    2024 · gopeek.ai · its alternatives →

12. 12
    OneTab▲458

    Save 95% memory by converting all your open tabs into a list

    2014 · one-tab.com · its alternatives →

13. 13
    tabExtend 2.0▲354

    More efficient browser workflows

    2023 · tabextend.com · its alternatives →

14. 14
    Coscreen.co – a radically different remote collaboration tool▲404

    Bring your team closer to you. One click to share and remote control any window. Get things done together like never before.

    2019 · coscreen.co · its alternatives →

15. 15
    TabTab▲271

    Supercharged windows & tabs manager for Mac

    2024 · tabtabapp.net · its alternatives →

16. 16
    CORS Unblock▲18

    Enable cross-origin requests for web applications

    2025 · chromewebstore.google.com · its alternatives →

17. 17
    Here▲304

    Hang out and collaborate over video on a real-time canvas

    2020 · here.fm · its alternatives →

18. 18
    wquicktabs▲103

    Quickly find your lost tabs across all opened windows.

    2018 · its alternatives →

19. 19
    Tabserve.dev. HTTPS proxy using Web Workers and a Cloudflare Worker▲117

    Tabserve gives you a https url for localhost using only the browser (tabserve.dev). Take a look: https://tabserve.dev

    2023 · tabserve.dev · its alternatives →

20. 20MS
    My small program from 2007 that gave Internet Explorer tabs▲173

    2022 · tabbed.org · its alternatives →

21. 21
    A browser extension that makes switching between tabs easier▲18

    2019 · chrome.google.com · its alternatives →

22. 22
    Sametab 2.0▲92

    Company-wide announcements in your team's Chrome new tab

    2019 · pulseasync.com · its alternatives →

23. 23
    interTabs▲118

    The AI Tab Manager

    2025 · intertabs.com · its alternatives →

24. 24
    TapTab – Tab switching web extension for Safari▲45

    I like the tab-switching behaviour in Chrome/Firefox and wanted Safari to have something similar. Another wish of mine was for it to be a web extension that feels native to the browser vs an app extension that looks out of place. I posted a while back on HN to see if other people feel the same and the response was very positive : https://news.ycombinator.com/item?id=33811253 Say hello to TapTab : https://apps.apple.com/app/apple-store/id1659363738?pt=66324... TapTab feels right at home in Safari and is loaded with features to improve how you…

    2022 · taptab.dev · its alternatives →

Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →