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Compose HTML with a live preview and insert it into a Gmail message at the cursor. Local-only, no accounts. Write HTML email — a newsletter, a styled announcement, a formatted table — and drop it straight into a Gmail message. HTML Composer gives you a fast, private path: type or paste HTML (or upload an .html file), see it rendered in a live preview, then insert it into your open Gmail compose window at the cursor. That's it. No accounts, no sign-up, and nothing is ever sent to a server — everything happens locally in your browser. WHAT IT DOES • Syntax-highlighted HTML editor with a live, side-by-side preview • Insert your HTML into a Gmail draft at the cursor, with one click • Upload an .html file, or drag and drop one onto the editor • Already have content in the draft? Choose to replace it or append — so you never paste twice by accident • A built-in example newsletter to start from, and one-click reset to defaults HOW TO USE IT 1. Open Gmail and click Compose. 2. Click into the message body to place your cursor. 3. Open the extension, write or paste your HTML, and check the preview. 4. Click "Insert into Gmail." Send as normal. PRIVATE BY DESIGN • The only site it can touch is mail.google.com. • No analytics, no trackers, no external servers, no account. • Your in-progress HTML is kept only in your browser for the current session and is cleared when you restart Chrome. • It never reads or transmits your emails, contacts, or any other Gmail data. GOOD TO KNOW Gmail sanitizes HTML when a message is sent: inline styles and standard tags are kept, but <style> blocks, external stylesheets, and class-based CSS (including media queries) are stripped. For best results, use inline styles and tables for layout — the same rules that apply to all HTML email. Open source — code and privacy policy: https://github.com/pastroup/gmail-html-inserter
Jul 3, 2026
rating_count is the Chrome Web Store ratings count, not a written-review count.
Media assets
Screenshots and videos on the listing.
Has promo video
Whether the listing includes at least one video.
Languages
Declared language locales.
Developer website
Listing exposes a developer website URL.
Contact email
Listing exposes a contact email.
Keyword in name
Case-insensitive substring match in the name.
Keyword in description
Case-insensitive substring match in the description.
Keyword occurrences in description
Count of case-insensitive occurrences in the description.
Category user-count percentile
Share of same-category extensions with fewer users (null if unknown).
These are transparent listing completeness / keyword signals, not a prediction of Chrome Web Store search ranking.