Cooling signalNo paid features detectedLow-risk permissions

Mermaid diagram renderer for GitHub

Render mermaid diagrams in markdown files in GitHub and GitHub Gist ([email protected]).

Users651Current public install base

Rating5.0Store average score

Reviews2Public review volume

Manifest versionV3Extension platform version

7-day growth-23Net users gained this week

7-day growth rate-3.41%Relative weekly velocity

Preview

Mermaid diagram renderer for GitHub Media preview

1 assets

Trend

User growth trend

Review user movement across collected snapshots.

User Growth Over Time

Rating trend

7-day rating trend

View collected rating snapshots from the latest 7-day window to assess rating stability.

7-day rating change

Start

5.00

Latest

5.00

7-day rating change

0.00

2026年7月15日2026年7月21日

Growth overview

Daily, weekly, and monthly growth

Compare 1-day, 7-day, and 30-day net growth and growth rate.

1-day growthDeclining

-10-1.51%

7-day growthDeclining

-23-3.41%

30-day growthDeclining

-20-2.98%

Technical snapshot

Version, languages, and crawl freshness

Review publication date, version, supported languages, and crawl timestamps.

Version1.0.5

ManifestV3

Size302KiB

Languages1English

Published--

Store updated--

Last crawled--

Overview

Product summary

Review the store description, core capabilities, and common use cases.

NOTE: As announced at 2022-02-14, now GitHub officially supports Mermaid code blocks in Markdown files. You no longer need to install this Chrome extension in most cases.

https://github.blog/2022-02-14-include-diagrams-markdown-files-mermaid/

An extension for Google Chrome and Chromium to render mermaid diagrams in markdown files in GitHub (https://github.com/*) and GitHub Gist (https://gist.github.com/*).

Features:

* The extension renders mermaid code blocks without sending the mermaid code to non-GitHub services, which is suitable for private repositories.

* The embedded mermaid version: ([email protected])

Reviews

Recent review snapshot

Inspect the latest comments and rating distribution.

Store average score5.0Chrome Web Store aggregate rating, including ratings without synced review text

Synced text average5.0Average computed only from synced review bodies below

Reviews with text2Synced review bodies

Total ratings / reviews2Chrome 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★

4★

3★

2★

1★

Code Tech2022年1月23日

It work for me perfectly

Michele Di Salvatore2021年12月22日

The only one working with the latest version

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AI product read

Render Mermaid diagram code blocks into SVG visualizations on GitHub and GitHub Gist pages.

GitHub's markdown viewer displays Mermaid code blocks as raw text instead of rendering them as diagrams. This extension solves that by injecting the Mermaid library to render these diagrams client-side.

User visits a GitHub or Gist page containing a mermaid code block -> Extension content script detects the block -> Mermaid library parses the code and generates an SVG -> SVG replaces or sits next to the original code block

Target users: Developers using GitHub/Gist who write documentation with Mermaid diagrams / Technical writers and engineers who need to visualize diagrams in markdown

Analysis is based on static code inspection only. Cannot verify runtime behavior or interactions with GitHub's UI updates beyond what is observable in the source.
The extension relies on GitHub's page structure; if GitHub changes their DOM, the extension may break, but this doesn't affect the login/paid assessment.

Monetization

No paid features detected

The extension is completely free with no paid features, subscriptions, or billing logic. It uses an open-source library (Mermaid) and contains no references to payment platforms, upgrade flows, or feature gating based on payment status. The 'pro' keyword hits in static analysis were false positives related to CSS selectors and license text.

Confidence: 95
Payment platform: --
Source: AI / High
Login required: No
Reason: The extension is a local content script that renders Mermaid diagrams directly in the browser on GitHub/Gist pages. It performs no authentication, does not call any login APIs, and does not require the user to create an account for the extension itself. While GitHub pages generally require login to view private repos, this requirement comes from the destination service (GitHub), not the extension.

Permission risk

Low-risk permissions

This estimate uses declared permissions and host permissions to assess access scope and sensitivity.

未命中敏感权限或广域站点访问规则

Publisher

tanakafwd.publish

Independent publisher

Email: [email protected]
Phone: --
Address: --

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Permissions

Host access