Email rendering infrastructure

Render emails in

Send HTML, .eml, or a real email. Get back screenshots from the clients your users actually open.

Render an email → Read the docs
Web · Android · Windows · macOS
Weekly Digest test_a3f9c1
Gmail Web client 1 / 8 Rendering live
1 Input
welcome.html .eml HTML
2 Rendering
1
Queued
test_a3f9c1
2
Delivering email
to gmail-web inbox
3
Finding message
match id + token
4
Opening client
wait for load
5
Capturing screenshot
full viewport
6
Complete
png ready
3 Client render
Gmail Web Web · Chromium Rendered in 3.8s
screenshot · 600×autogmail-web.png
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Inputs

Send an email. Any way you want.

Render the same email from the browser, your application, CI, or a coding agent.

01

HTML

Submit raw email HTML.

02

.eml

Upload the generated message.

03

Inbound email

Send directly to a test address.

04

API

Create renders programmatically.

05

MCP

Give coding agents access to real client renders.

How it works

Rendered in the client. Not simulated.

Render My Email sends your email to a real inbox, opens the exact message in the target client, and captures the result.

01

Deliver

Send the email to the target inbox.

02

Locate

Find the exact message for the render.

03

Open

Load it inside the target email client.

04

Capture

Return a screenshot of the rendered email.

HTML   → inbox   → email client   → screenshot
Agents

Agents can test what they generate.

Give coding agents a way to render the emails they generate, inspect the result, and make another attempt.

agent · mcp://rendermy.email
Static analysis

Check compatibility before you render.

Check the email for common compatibility risks before starting a client render.

Runs instantly · Uses 0 render credits

Missing DOCTYPE

Warning
<!doctype html>

Missing viewport

Warning
<meta viewport>

display: flex

Unsupported
display: flex

display: grid

Unsupported
display: grid

Fixed-width overflow

Risk
width > 600px

JavaScript

Unsupported
<script>

Forms

Risk
<form> <input>

SVG

Risk
<svg>

External stylesheets

Risk
<link rel=css>

Dark-mode risks

Warning
prefers-color-scheme
Pricing

350 renders. $9.99.

Subscribe for regular testing, or buy credits once and use them whenever you want.

Pro
$9.99 / month
350 credits every month
Best for developers who test emails regularly.
  • All available email clients
  • HTML and .eml
  • REST API
  • MCP
  • Inbound email testing
  • Full-resolution screenshots
  • Compatibility analysis
  • 30-day result retention
  • No per-seat pricing
Join the waitlist →
Credits reset each billing cycle. Cancel anytime.
1 credit = 1 email rendered in 1 client
1 email × 1 client → 1 credit 1 email × 4 clients → 4 credits 1 email × 9 clients → 9 credits
350 credits is enough for approximately 38 complete 9-client tests.
Need more credits?
350 credits $9.992.85¢ per render
1,000 credits $34.993.5¢ per render
Purchased credits never expire. Monthly credits are used before purchased credits.
//  before you hit send

See the email before your users do.

Render it in Gmail and Outlook before you send it.

Render your first email →