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postMessageObserver icon

postMessageObserver

A Chrome extension that allows you to observe the flow of postMessage messages on the side panel.

Users932Current public install base
Rating5.0Store average score
Reviews1Public review volume
Manifest versionV3Extension platform version
7-day growth-1Net users gained this week
7-day growth rate-0.11%Relative weekly velocity
Preview

postMessageObserver Media preview

1 assets
Trend

User growth trend

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User Growth Over Time

9209259319369412026年7月15日2026年7月18日2026年7月21日Latest: 932
Rating trend

7-day rating trend

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7-day rating change

Start
5.00
Latest
5.00
7-day rating change
0.00
4.904.955.005.055.102026年7月15日2026年7月18日2026年7月21日Latest: 5.00
2026年7月15日2026年7月21日
Growth overview

Daily, weekly, and monthly growth

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1-day growthGrowing
+8+0.87%
7-day growthDeclining
-1-0.11%
30-day growthGrowing
+2+0.22%
Technical snapshot

Version, languages, and crawl freshness

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Version1.0.0
ManifestV3
Size23.07KiB
Languages1English (United States)
Published
Store updated
Last crawled
English (United States)
Overview

Product summary

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Chrome PostMessage Observer provides a convenient side panel to view postMessages for the current page. This extension offers a user-friendly UI that simplifies the debugging and observation of message flows between iframes and the top window. Easily intercept and analyze postMessage messages, view their payload, source, and target details, and efficiently troubleshoot communication issues within web applications.

Contributions are welcome to the GitHub project, which can be found here: https://github.com/yishiashia/chrome-postmessage-observer

Reviews

Recent review snapshot

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Store average score5.0Chrome Web Store aggregate rating, including ratings without synced review text
Synced text average--Average computed only from synced review bodies below
Reviews with text0Synced review bodies
Total ratings / reviews1Chrome Web Store public rating/review count

Store average score: 5.0. The bars below are calculated from synced review text only, so they may be empty for extensions that have public ratings but no synced comments yet.

5★
0
4★
0
3★
0
2★
0
1★
0
No synced review text is available yet.
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