Stable signalNo paid features detectedMedium-risk permissions

Insert and Send HTML with Gmail

Easily insert custom HTML into your Gmail emails with this handy extension. Create and preview your custom emails directly in Gmail.

Users40KCurrent public install base

Rating3.8Store average score

Reviews33Public review volume

Manifest versionV3Extension platform version

7-day growth0Net users gained this week

7-day growth rate0%Relative weekly velocity

Preview

Insert and Send HTML with Gmail Media preview

4 assets

Trend

User growth trend

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User Growth Over Time

Rating trend

7-day rating trend

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7-day rating change

Start

3.79

Latest

3.79

7-day rating change

0.00

2026年7月15日2026年7月21日

Growth overview

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1-day growthFlat

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Technical snapshot

Version, languages, and crawl freshness

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

Version1.0.13

ManifestV3

Size1.11MiB

Languages1English

Published--

Store updated--

Last crawled--

Overview

Product summary

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

Easily insert custom HTML into your Gmail emails with this handy extension. Perfect for marketers, designers, and anyone looking to enhance their emails with personalized, beautifully formatted content. Create and preview your custom emails directly in Gmail.

Insert HTML into Gmail email offers the possibility to send HTML email templates from Gmail to your email subscribers list.

🔥🔥🔥 Explore our Gmail HTML email templates library here: 👇

- https://designmodo.com/email-templates/gmail/

Edit Gmail email templates with email builder:

- https://designmodo.com/postcards/

Reviews

Recent review snapshot

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Store average score3.8Chrome Web Store aggregate rating, including ratings without synced review text

Synced text average3.7Average computed only from synced review bodies below

Reviews with text27Synced review bodies

Total ratings / reviews33Chrome Web Store public rating/review count

Store average score: 3.8. 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★

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1★

Thiago Tolotti2022年8月4日

After August 2022 gmail update the button doesn't show up anymore to me :(

Paddy Landau2022年6月30日

Basic functionality, but does its job perfectly. (For those wondering where the button is, refresh your Gmail tab. The very first time, the button takes a while, but thereafter shows immediately.)

Philippe Boblet2022年6月17日

Doesn't work. Button doesn't show up

David Rueda Cortés2021年9月6日

It does work only on the main account, but the button doesn't show up on the secondary accounts. I'm using multiple emails so I hoped it could work with all them. Besides this problem, it works really good, however iframes aren't being saved, wanted it to change the change the signatures to all from our cloud, probably this is due Gmail security? Anyways, very useful, only needs this issue to be fixed!

Volkan Akin2021年4月4日

It's great that this extension helps to add html code/template in the email compose

Michael Clarck2021年4月1日

Amazing extension, very easy to use and does it's job very well! Thank you for creating it!

Andrian V.2021年3月31日

This extension helps me a lot to send pre-designed Gmail HTML email newsleters.

Showing 27 results

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AI product read

Insert custom HTML content directly into Gmail compose windows

Gmail's native compose editor does not support direct HTML source editing. This extension allows users to paste raw HTML into a modal and inject it into the Gmail compose body, enabling richly formatted HTML emails to be sent through Gmail.

User opens Gmail compose window → clicks the extension's inserted button → a modal appears with an HTML textarea → user pastes custom HTML code → clicks 'Insert HTML' → the HTML is injected into the Gmail compose body → user sends the email normally through Gmail

Target users: Email marketers sending HTML-formatted campaigns via Gmail / Email designers needing to preview and send HTML templates / Business professionals wanting visually enhanced emails through Gmail

content.js is a massive 85,946-line bundled file (4.19MB) containing the full InboxSDK library; only the tail end (~lines 85770-85944) contains the extension's custom logic
The hardcoded oauth.json token and background.js source map references to 'inboxaccel.com' API suggest possible backend communication whose full scope could not be verified
Could not verify all code paths in the minified pageWorld.js (1.4MB bundled file)

Monetization

No paid features detected

No evidence of payment processing, subscription gating, or premium feature tiers within the extension source code. No Stripe, billing, price, plan, premium, upgrade, or payment keywords found. The deterministic heuristic flagged 'subscribe' but this comes from store description copy about sending emails to 'subscribers' (marketing terminology), not billing. The 'pro' and 'license' hits are from jQuery library headers (generic boilerplate). The extension links externally to Designmodo Postcards (email builder) and email template libraries which have their own pricing, but the extension itself does not gate any features behind payment.

Confidence: 80
Payment platform: --
Source: AI / Medium
Login required: No
Reason: The extension requires no account or login of its own. It only operates on Gmail pages (host_permissions for mail.google.com/inbox.google.com) and the user must already be logged into Gmail to use it, but that is a Gmail prerequisite, not an extension login requirement. The manifest requests only scripting, tabs, and activeTab permissions—no identity or OAuth permissions. An oauth.json file exists with a hardcoded Google OAuth token, but this appears to be related to InboxSDK library internals or a residual artifact, not a user-facing login flow.

Permission risk

Medium-risk permissions

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

扩展能力较强：scripting、tabs、activeTab

Publisher

Designmodo

Independent publisher

Email: [email protected]
Phone: --
Address: 50 N 1st St #4i Brooklyn, NY 11249 US

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