@emailens/cli
Advanced tools
CLI tool for email compatibility analysis — analyze, preview, and export email rendering across 12 email clients.
CLI tool for email compatibility analysis — preview how HTML emails render across 12 email clients (Gmail, Outlook, Apple Mail, Yahoo, Samsung, Thunderbird, HEY, Superhuman).
npm install -g @emailens/cli
Or use with npx:
npx @emailens/cli analyze email.html
emailens analyze <file>Analyze CSS compatibility and get per-client scores.
emailens analyze email.html
emailens analyze email.html --clients gmail-web,outlook-windows
emailens analyze email.html --json
cat email.html | emailens analyze -
emailens preview <file>Full preview pipeline: transforms, analysis, dark mode simulation, and optional screenshots.
emailens preview email.html
emailens preview email.html --dark-mode
emailens preview email.html --screenshots --out ./screenshots
emailens preview email.html --json
emailens export <file>Export a self-contained HTML or JSON report.
emailens export email.html -o ./report
emailens export email.html --json -o ./report
emailens export email.html --dark-mode --screenshots -o ./report
emailens clientsList all 12 supported email clients.
emailens clients
emailens clients --json
All file-processing commands share:
| Flag | Alias | Description |
|---|---|---|
--format | -f | Input format: html, jsx, mjml, maizzle |
--clients | -c | Comma-separated client IDs to filter |
--json | Output JSON instead of terminal table | |
--quiet | -q | Suppress spinners and decorations |
Preview and export add:
| Flag | Alias | Description |
|---|---|---|
--dark-mode | -d | Include dark mode simulation |
--screenshots | Capture screenshots (requires BROWSERLESS_URL) | |
--out | -o | Output directory |
The CLI can compile React Email (JSX/TSX), MJML, and Maizzle templates to HTML before analysis. Format is auto-detected from file extension, or specify with --format.
emailens analyze newsletter.tsx # Auto-detected as JSX
emailens analyze template.mjml # Auto-detected as MJML
emailens preview email.html --format maizzle # Explicit format
Framework compilers are optional peer dependencies — install only what you need:
npm install sucrase react @react-email/components @react-email/render # For JSX
npm install mjml # For MJML
npm install @maizzle/framework # For Maizzle
Screenshots require a Browserless instance and playwright-core:
npm install playwright-core
export BROWSERLESS_URL=ws://localhost:3000
emailens preview email.html --screenshots --out ./screenshots
Read from stdin with -:
cat email.html | emailens analyze -
echo '<html><body>Hello</body></html>' | emailens preview - --json
MIT
FAQs
CLI tool for email compatibility analysis — analyze, preview, and export email rendering across 21 email clients.
The npm package @emailens/cli receives a total of 45 weekly downloads. As such, @emailens/cli popularity was classified as not popular.
We found that @emailens/cli demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 1 open source maintainer collaborating on the project.
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