HTML vs Plain Text Emails: Examples & Key Differences for Email Campaigns

When we start an email campaign, the first decision that hits the mind is not whether to focus on the subject line or the offer or the format. Should this go out as a designed, branded email or a simple, no-frills message that looks like it came from a colleague? Am I right?

If you choose the wrong format, it can cost you not just money but all the metrics as well. A well-designed HTML email can land in spam because of its code. On the other hand, even a plain text email can also look too lazy next to a polished competitor email. Many marketers choose a format out of habit instead of thinking about what works best for their audience. And then, they wonder why open and click rates stay the same.

But no worries! After reading this guide on HTML vs plain text email, you will be able to avoid this mistake. You will know here what each format actually is, real HTML & plain text email examples, where each one wins, and how to decide which one your next campaign needs. So read it out completely.

What is an HTML email?

Firstly, let’s understand briefly what an HTML email is. So, HTML is built with the HyperText Markup Language and CSS, which is the same code that powers websites. This is why you can add logos, colored buttons, product images, custom fonts, and a layout that matches your brand in your HTML email. Basically, it’s a small webpage that lives inside someone’s inbox.

HTML email example:

Subject: Your order #6756 has shipped.

Your email contains a branded header with your logo. Along with that, your email will have a product image, a short two-line message (“Your music system is on the way!”), a green “Track My Order” button, and a footer with your social icons and unsubscribe link.

That’s the structure behind almost every marketing email, newsletter, or promo you’ve ever opened.

Where HTML email works best: Email marketers use HTML for newsletters, product launches, sales and discount campaigns, onboarding sequences, event invites, and anything where visuals or a clear call-to-action matter.

Why do you need HTML format? Strengths:

• Control over design, colors, and brand identity
• Room for images, GIFs, and clickable buttons
• Simple to track opens and link clicks
• Gives a professional and polished touch

HTML Email Limitations

• Complex or image-heavy code can trigger spam filters.
• Large emails may load slowly on poor connections.
• The email may look different in Gmail, Outlook, and Apple Mail if it is not.

What is a plain text email?

A plain text email contains just words. There are no images, no buttons, no coloured fonts, and no design. It remains plain and clean text only. It reads like a personal message, not a marketing blast. That is why it works so well in certain situations.

Plain text email example:

Subject: Your order #6546 has shipped.

Hi Priya,

Your music system is on the way. You can track the order here: [link]

Thanks for shopping with us!

The team

(No layout, no branding, just a short direct message. That simplicity is the whole point.)

Where plain text email marketing works best: Plain text email works best for transactional emails (OTPs, receipts, password resets), one-to-one sales outreach, follow-ups, and internal or system notifications.

Strengths:

• It loads instantly on every device and every connection
• This plain text email wins trust as it reads as personal and genuine
• Low spam landing
• Nothing to break across different inboxes

Plain Text Email Limitations

• No visuals, so it can’t reinforce brand identity the way HTML can
• Harder to track opens (you can only track link clicks, and only if you add one)
• No buttons, so calls to action rely on a plain hyperlink.

HTML vs plain text email: Key Differences

Factor	HTML email	Plain text email
Design and branding	Full control – colors, images, layout	None – text only
Load time	Slower, depends on images and CSS	Instantly, on any device
Deliverability	Can trigger filters if poorly coded	Generally reaches the inbox reliably
Tracking	Opens and clicks are both trackable.	Only link clicks are trackable
Accessibility	Needs alt text and clean code to work well with screen readers	Naturally accessible – screen readers handle it easily
Best for	Newsletters, promotions, launches	Receipts, OTPs, outreach, follow-ups
Effort to create	Needs design or a template builder	Write and send.

Neither format is “better” in the abstract. The right one depends entirely on what the email needs to do.

Plain text vs HTML email: which should you send?

If you are a marketer and confused about which one to choose or which one is best, let me tell you that there is nothing like best. It is just about your target audience and message type. 

HTML email: When you are selling something visually, like a product launch, a big sale, or a new feature, you should go with HTML because buyers respond to images and clear buttons. Additionally, you can also choose this if you need hard data on engagement. HTML gives you open and click tracking in one package, but plain text only gives you clicks.

Plain text email: To send a one-to-one-style message, like a sales follow-up, a check-in, or a renewal reminder, plain text email feels more personal and gets read. Additionally, it works better for transactional emails like OTPs, invoices, and password resets. Plain text (or very light HTML) is faster and safer. If your list segment has weak engagement or your domain reputation needs rebuilding, you need to rely on plain text campaigns because it will save your email deliverability.

Most experienced email marketing teams don’t pick one forever. They match the format to the email message for every campaign.

Can plain text email be better than HTML in an email campaign?

As a performance-based approach, plain text email often delivers better results than HTML.

High Deliverability

Spam filters are naturally more suspicious of image-heavy, code-heavy emails. A clean plain text message has less to flag.

Trust-driven messages.

Plain text builds trust sooner than HTML because its language and message feel more real and genuine. That’s why sales outreach, renewal reminders, and win-back emails often convert better.

New or recovering sender domains

If you’re warming up a domain or repairing a damaged sender reputation, lighter plain text sends put less strain on filters while you rebuild trust.

Mobile-heavy audiences

One more important reason why people choose it is that plain text loads instantly and never breaks.

So the honest answer is that plain text can absolutely beat HTML, but usually on trust and deliverability. If you are looking for visual engagement or brand recall, HTML will perform well. If your goal is to get clicks on a product image or a discount banner, HTML still wins.

Why use an HTML Checker and QA automation before sending an email?

Testing your HTML email before sending helps catch issues that subscribers might see, such as broken code, missing images, bad links, or layout problems.

An HTML checker helps you find coding and formatting issues, while QA automation can help test links, rendering, and other common problems before the email goes live to the inbox.

A simple pre-send checklist:

1. Run an HTML checker to find broken markup and missing alt text.
2. Preview the email in Gmail, Outlook, Apple Mail, and on mobile.
3. Check all links, buttons, and the unsubscribe link.
4. Review the text-to-image balance and avoid image-heavy emails.
5. Send a test email before your final send to the full list.
6. Check the plain text version and see whether the message remains readable without HTML.

When you add these checks to your email workflow, it will help you catch common errors in email before they reach your subscribers.

Combine both formats to send smarter email

Most professional senders don’t choose HTML or plain text, but they send both in the same email. This is called a multipart email, and it’s standard practice for any decent email marketing service.

Suppose someone has blocked HTML, slow-loading images, or uses a screen reader; still, they get a fully readable message in plain text. You can get the branding benefits of HTML without compromising on accessibility or deliverability. That’s why choosing the right email marketing service is very important.

How to change from plain text to HTML in Outlook when replying

If you’ve opened a plain text message in Outlook and want to reply with formatting, links, or images, here’s the fix:

1. Open the message in its own window. If you’re replying from the Reading Pane, click Pop Out first. (The format option won’t show up otherwise.)
2. Go to the Format Text tab on the ribbon.
3. Click HTML in the Format group. Your formatting tools – fonts, colours, bullet points, and hyperlinks – will reappear immediately.
4. If your signature looks off after switching, reinsert it manually so the formatting carries through.

One thing to know is that Outlook does not have a permanent setting to always reply in HTML. It generally uses the same format as the original email. So, you will have to change the format for each message. 

Wrapping up

If you are sending newsletters, promotions, and product launch emails and need design, branding, and tracking, you should use HTML. In comparison, when you need to send transactional messages, outreach, and follow-ups, this demands on-time delivery. Plain text email marketing is effective for building trust, deliverability, and speed.

Additionally, do not forget to run an HTML checker and build simple QA automation into your send process when starting email marketing. Because broken code costs opens and trust. The best long-term approach for most brands is sending both formats together through a reliable email marketing platform like TrueSend.  

Frequently asked questions (HTML vs Plain Text)

1. Is HTML or plain text better for email?

HTML or plain text email – which one is better completely depends on your aim, email recipient, and your message type. When you are writing a promotional email or newsletter, HTML works better, and when you need to send transactional emails and one-to-one outreach, you can use plain text.

2. Should I use HTML or plain text for email merges? 

You should use plain text emails for a mail merge. Merged emails often feel like one-to-one messages, for example, renewal reminders, personal outreach, or check-ins. Plain text keeps this personal feel and uses less data, which can help with email deliverability.

3. Does a plain text email look unprofessional? 

No. A plain text email looks direct and trustworthy because when you write a clear message in plain text with correct spelling, simple formatting, and a working plain-text link, it can look professional. Whereas a broken HTML email with missing images or misplaced buttons can look much worse. If you are not sure your HTML will display properly across email clients, your plain text is a safer option.

4. Do plain text emails get better open rates than HTML emails? 

Open rate metrics depend on the subject line, sender reputation, and list quality, not email format alone. Plain text emails can reach the inbox more consistently because they are less likely to trigger spam filters. This actually helps improve open rates. But HTML emails can also perform well when email deliverability is strong. They also allow open tracking through a tracking pixel.

5. Can I switch an existing HTML template to plain text without starting over?

Yes. You can easily switch from an HTML template to plain text with TrueSend, an email marketing platform. Along with that, you can clear the images, styling, and buttons manually and keep only the main message with your clear link.