Test emails before you send.
Preview, validate, inline.

API-first HTML email testing. Render pixel-perfect previews, catch common issues, and convert CSS to inline styles — all with a single API call.

⚡ Try it — paste HTML email code and validate

Everything you need for email testing

📸

Email Preview

Render HTML emails as pixel-perfect screenshots. Test how your email looks across different widths before sending.

✅

HTML Validation

Check for missing alt tags, inline styles, dark mode support, spam trigger words, oversized HTML, and more.

🎨

CSS Inliner

Convert <style> blocks to inline styles automatically. Essential for email client compatibility.

🌙

Dark Mode Check

Verify your email has proper dark mode support with color-scheme meta tags and prefers-color-scheme media queries.

🚫

Spam Word Detection

Catch common spam trigger words that could land your email in the junk folder before you hit send.

⚡

Simple REST API

Three endpoints, JSON in and out. API-key auth. Integrate into your CI/CD pipeline or email workflow in minutes.

Simple API, powerful results

# Render email as screenshot
curl -X POST https://mailforge.grabshot.dev/v1/preview \
  -H "x-api-key: YOUR_KEY" \
  -H "Content-Type: application/json" \
  -d '{"html":"<h1>Hello!</h1>","width":600}' \
  --output preview.png

# Returns: PNG image

Simple, transparent pricing

Free

$0/mo
  • 25 requests/month
  • All 3 endpoints
  • 600px preview width
  • PNG output

Starter

$9/mo
  • 500 requests/month
  • All 3 endpoints
  • Custom preview widths
  • PNG & JPEG output

Pro

$29/mo
  • 5,000 requests/month
  • All 3 endpoints
  • Priority rendering
  • Higher rate limits

Business

$79/mo
  • 50,000 requests/month
  • All 3 endpoints
  • Dedicated support
  • Highest rate limits

Start testing emails in seconds

No credit card required. Free plan includes 25 requests every month.

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