Letter

Letter is a free one-page HTML CSS sign-up form template from Templatemo, designed to capture email addresses with a zooming background image and particle effects.

What is Letter?

Letter (also listed as Templatemo 510 Letter) is a minimal, responsive one-page HTML form layout for collecting sign-ups. It takes a visitor's email address through a simple input field and submits it via the built-in form markup. The template runs on any static web host, requires no build tools or server-side code, and is developed and distributed by Templatemo, a site offering free HTML CSS templates. Added on 11 January 2018, it has been downloaded 19,325 times and viewed over 136,700 times.

Key Features

• One-page layout — A single-page design containing just a heading, a sign-up form, and a footer, keeping the user focused on entering an email.
• Zooming background image — The background image scales and zooms slowly for a subtle motion effect, adding visual interest without JavaScript dependencies.
• Particle effect — Uses the particle system by Vincent Garreau (particles.js) to display animated floating dots over the background, implemented with JavaScript.
• Responsive design — The layout adapts to mobile and desktop viewports, keeping the form centered and usable across screen sizes.
• Free for commercial use — The template can be downloaded, edited, and used on commercial or non-commercial sites without payment or attribution.
• Simple form markup — Includes standard HTML form inputs for name and email, ready to be wired to any backend or form service.
• Cross-browser compatible — Built with plain HTML and CSS, so it works in all modern browsers without any framework-specific dependencies.

Who is it for?

Letter is for web designers and developers who need a quick, attractive email capture page without writing custom CSS. It's also useful for startup founders preparing a pre-launch landing page to collect early interest, and for freelancers who want a lightweight sign-up form for a side project. Because it's a single HTML file with separate assets, anyone comfortable editing HTML can replace the background image and form action in minutes.

What can you do with Letter?

• Launch a pre-launch page — Startups can deploy this template to gather email addresses before a product release, pointing the form to a service like Mailchimp or a custom PHP script.
• Collect event RSVPs — Event organizers can adapt the sign-up form to gather attendee registrations for a webinar or meetup, changing the field labels as needed.
• Create a waitlist — App developers can use the simple form as a waitlist for a mobile app, editing the success message to confirm sign-ups.

Pricing

Letter is 100% free to download. Templatemo does not charge a fee and grants permission to edit and use the template for both personal and commercial projects.

Alternatives

• Tooplate — Another free HTML template directory that offers many similar minimal and creative CSS layouts, also distributed without license fees.

FAQ

Is the Letter template really free?

Yes. The official page states it is 100% free to download for anyone, and you are allowed to download, edit, and use it for commercial or non-commercial sites. There are no hidden fees or premium tiers for this template.

Do I need to know HTML or CSS to use Letter?

Some basic HTML knowledge helps if you want to change the form behavior or replace content, but the template works as-is for simple email collection. You only need to upload the HTML file and its asset folders to any web server.

Does Letter include a working backend for form submissions?

No. Letter is a front-end HTML form only. It includes markup for a sign-up form, but you must connect it to a server-side script, a form service, or an email marketing platform to actually store or send submissions. Templatemo provides a link to a simple contact form PHP script on an external site.

What files are included in the download?

The download contains the HTML document, CSS stylesheets, JavaScript for the particle effect, and the background image assets. You can download the ZIP from the Templatemo download button.

Can I remove the Templatemo credit link?

Templatemo's usage terms for this template are not fully detailed on the page, but the site permits editing. The page says you can download, edit, and use it, so you may modify the footer credit, though checking the license file is recommended.