Inbox Lab
See Your Campaign Across Devices, Modes and Recipients
Inbox Lab is the preview environment inside Inbrovia. It renders the real campaign, with the real recipient data, exactly the way the sending engine will. No separate tool, no exported test file, no guessing.
Spring Offer · Acme Marketing
What you can check
Six views of one campaign.
Desktop, tablet, mobile
Each device is rendered at its real width, so stacked columns, full-width buttons and hidden blocks behave the way they will in the inbox.
Light and dark mode
Dark mode is simulated the way mailbox apps apply it, so you see inverted backgrounds, low-contrast text and logos that disappear.
Images on and off
With images off you see alt text, missing alt text and buttons that were really images.
Preview as a recipient
Choose a real recipient and watch first names, fallbacks and conditional blocks resolve for that person.
Link review
Every link in the campaign is listed with its destination and label, so a wrong URL never reaches the send step.
Plain-text version
The plain-text alternative is generated from the same document and can be edited before sending.
Dark mode and images off
The two views most campaigns never get.
Most layout surprises come from dark mode and blocked images. Inbox Lab shows both with one click, on the same rendered document you are about to send.
- Dark backgrounds and inverted text applied
- Images replaced by alt text, with missing alt text visible
- Same rendered HTML as the live send
Recipient simulator
Personalization you can see, not assume.
Switch between recipients to confirm that greetings, fallbacks and conditional sections resolve correctly for every kind of contact in your audience.
Recipient data
- Plan: Pro
- Country: USA
- Customer type: VIP
What this recipient receives
- · Greets Sarah by name
- · Shows the VIP early-access offer
- · Shows the US free-shipping line
How it fits
Preview is a step, not a separate tool.
Inbox Lab sits between Build and Check in the campaign workflow. What you see here feeds Campaign Guardian, and what Guardian flags opens back in Inbox Lab.
- Does the preview match what recipients receive?
- Yes. Inbox Lab uses the same rendering engine as the sending pipeline, with the same recipient data. The only difference is that nothing is sent.
- Can I preview as a recipient who is not in my audience yet?
- Yes. Inbrovia includes sample recipients with different plans, countries and customer types, and you can type custom values to test a fallback.
- Is dark mode an exact copy of every mail app?
- No preview can promise that. Inbox Lab simulates the common approach mailbox apps take so you see the typical failures: inverted backgrounds, low contrast and logos that vanish.
- What about the plain-text version?
- It is generated from the same document and shown in Inbox Lab. You can edit it before sending.
Preview your next campaign in Inbox Lab.
Start free and see your campaign on every device in minutes.