Build Emails,
Not Tech Debt.
A block-based email builder that runs entirely in your browser. No account. No servers. No "let me just watch this 12-minute onboarding video." Open it and build.
Why marketers switch to ModuLetter
Most email builders are either too complex or too limited. We're the one that's neither.
12 Blocks. That's the Whole Tool.
Section, Heading, Text, Image, Button, Card, Split, Divider, Spacer, Icons. Each one does one thing well. No 47-option toolbar. No "advanced mode." Just blocks that snap together into emails that look like someone actually designed them.
Your Browser Is the Server
Everything runs client-side. Your drafts, your images, your client's brand colors — none of it touches our servers. Works offline. Respects your privacy by architecture, not by policy.
HTML That Survives Outlook
We compile through MJML, which means your emails render correctly in every client that matters. Even Outlook. Even the Outlook that runs on a 2015 desktop in your client's accounting department.
How it actually works
Three steps. No tutorial video required.
Pick blocks, fill in fields.
No drag-and-drop roulette. Pick a block, fill in the fields, see it render. The sidebar tells you exactly what each block needs. You don't design layout — we already did that.
Preview it on desktop and mobile.
Toggle between desktop and mobile previews. See exactly what your recipient sees. MJML handles the responsive breakpoints so you don't have to think about media queries. (You probably don't want to think about media queries.)
Export and go.
Copy the HTML, paste it into Mailchimp, Klaviyo, GoHighLevel, ConvertKit, or whatever you're using to actually send emails. ModuLetter builds them. You send them. Clean separation of concerns.
Click to edit. Literally.
Live Edit mode lets you click any element in the preview to select it. Edit text inline. Change properties in a floating panel. It's the editing experience you expected email builders to have by now.
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Inline text editing
Click a heading or paragraph — type directly in the preview.
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Floating properties panel
Select any component — its settings appear right there.
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Drill into containers
Click a card or section to scope editing to its children.
Your next email, built on the bus.
ModuLetter isn't a desktop tool with a mobile afterthought. The entire builder works on your phone — same components, same templates, same output. Tweak a headline from the airport. Swap an image between meetings. Ship a campaign from the couch.
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Touch-native interface
Tap to select, swipe between preview and build mode. No pinch-zooming into tiny buttons.
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Full component library
Every block, every template, every setting — available on screens of all sizes.
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Works offline (ish)
Spotty connection? No problem. Everything runs in your browser — even on mobile data or airplane mode.
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Export anywhere
Copy HTML, download your config, or save to your device — right from your phone.
Start with something that doesn't look like a template.
12 starter templates with opinions. Each one is actually written, not lorem-ipsum'd.
Newsletter Classic
Clean, professional newsletter with headings, dividers, and text blocks.
Product Launch
Sleek product announcement with hero image, feature splits, and a bold CTA.
Event Invitation
Bold event invite with a hero section, details, and RSVP button.
Welcome Email
Warm onboarding email with image, intro text, and a get-started CTA.
Company Update
Structured company newsletter inside a card, with multiple sections and dividers.
Conference Announcement
Modern conference promo with hero image, speaker bios, and registration CTA.
Weekly Digest
Content-rich digest with multiple card blocks, each featuring an image and blurb.
Survey Request
Focused, minimal survey request with a centered heading and a big CTA.
Holiday Greeting
Warm, festive holiday message with an image and heartfelt (ish) wishes.
Job Posting
Structured job announcement with a split layout for description and benefits.
Nonprofit Appeal
Emotional fundraising appeal with a hero image, story, and donate button.
Webinar Reminder
Punchy reminder email with a bold heading, event details, and register button.
Yes, the placeholder copy is passive-aggressive. You're welcome to replace it with your own. But you might want to keep some of it.
How ModuLetter compares (we'll be honest)
We're not going to name names. You already know the tools. Here's how the approaches differ.
| Typical Email Builder | ModuLetter | |
|---|---|---|
| Getting started | Create account, verify email, pick a plan, watch tutorial, start | Open the URL, start |
| Editing model | Drag anything anywhere, hope it doesn't break | Pick a block, fill in the fields, it works |
| Learning curve | "Check out our 47-part video series" | If you've used a form, you can use this |
| Privacy | "We take your privacy seriously" (stores everything on their servers) | Client-side. We literally cannot see your data. |
| Outlook support | "Results may vary" | MJML compilation. It just works. |
| Price | $30-100/mo for the tier with a decent builder | Free. The whole thing. |
| Vendor lock-in | Proprietary format, good luck leaving | Standard HTML export. Take it anywhere. |
Getting started
Editing model
Learning curve
Privacy
Outlook support
Price
Vendor lock-in
When beautiful emails aren't enough.
ModuLetter handles the email stuff. For custom websites, automations, or completely custom development — that's what Vynxlabs does.
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Automations & CRM Implementation For small business and enterprise. HubSpot, Marketo, and beyond.
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Custom Internal App Development Tools your team actually needs, built to spec.
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Full Website & Marketing Infrastructure From landing pages to full marketing stacks.
Custom Dev Request
Average response time: 24h
The tool is free. Seriously.
Pay only if you want your stuff saved between sessions.
$0 /mo
Free forever. No catch. No "free trial." No credit card.
- Unlimited Emails
- All 12 Components
- All View Modes (Preview, HTML, MJML)
- Template Library
- Import/Export & URL Sharing
- Live Edit Mode
- Session Persistence
$9 /mo
For people who use this more than once.
- Everything in Community
- Cloud-Synced Template Library
- Template Versioning (10 per template)
- Branding Removed
- Priority Support
$19 /mo
Coming soon. We'll tell you when.
- Everything in Pro
- Short URL Sharing
- Client Review Links
- Folder Organization
Your next email is 30 seconds away.
No signup. No credit card. No "book a demo." Just the tool.
Open ModuLetter