How to create an AI writer in 9 easy steps

May 19, 2026

Dainius K.

6 min Read

An AI writer web app helps users generate written content from simple prompts. It can create blog drafts, emails, product descriptions, social posts, ads, outlines, and other copy faster than starting from a blank page.

With AI and vibe coding, you can describe how the writing tool should work — content type selection, tone controls, prompt fields, output editor, and copy/export actions — and quickly turn it into a working web application.

Using Hostinger Horizons, you can create and customize an AI writer without writing code. Add writing templates, tone options, saved drafts, and editing tools through simple follow-up prompts.

TL;DR: How do you create AI writer fast?

Define the writing use cases. Decide whether users generate blog posts, emails, social captions, ads, product descriptions, or all of these.
Generate the writing interface with AI. Ask Hostinger Horizons to create prompt fields, content type selectors, and output sections.
Add customization controls. Include tone, length, audience, keywords, and format options so outputs feel more useful.
Publish and start generating content. Launch the web app so users can create drafts instantly.

Step 1: Define the problem your AI writer solves

This tool helps marketers, creators, business owners, bloggers, freelancers, and teams do fast content drafting so they can create usable first drafts without starting from scratch.

For example:

Bloggers can generate article outlines and drafts. This helps speed up research, structure, and writing workflows.
Small businesses can write marketing copy. This makes it easier to create emails, ads, landing page sections, and product descriptions.
Social media teams can create post ideas. This helps maintain a consistent publishing schedule across platforms.

Decide whether your AI writer focuses on marketing copy, long-form content, social media, business communication, or general writing.

Step 2: Outline what to include in the first version of your AI writer

Focus on the core writing workflow first.

Content type selector. Let users choose what they want to generate, such as blog post, email, ad copy, product description, or social caption.
Prompt input field. Allow users to describe the topic, goal, audience, and key points so the output has useful context.
Tone and length controls. Give users options like professional, friendly, persuasive, concise, or detailed to shape the result.
Generated output editor. Display the result in an editable area so users can refine, copy, or export the draft.

Start with a few strong templates, then add more writing formats later.

Step 3: Create a user flow from start to finish

Design the writing experience clearly.

Landing → User opens the AI writer and selects the type of content they want to create.
Input → User enters the topic, audience, tone, keywords, and any required details.
Processing → The system generates a draft based on the selected format and instructions.
Result → User reviews the generated text in an editable output area.
Next step CTA → User copies, edits, regenerates, saves, or exports the content.

Step 4: Generate the first version with Hostinger Horizons

Open Hostinger Horizons and describe your AI writer clearly.

For example: “Create an AI writer web app where users choose a content type, enter a prompt, select tone and length, then generate editable copy.”

Horizons will generate a working preview where you can test input fields, content templates, and output formatting.

You can refine it with prompts like:

“Add templates for blog posts, emails, ads, and product descriptions.”
“Add tone options for professional, friendly, persuasive, and casual.”
“Add copy, regenerate, and save draft buttons.”
“Add keyword input for SEO content.”

Step 5: Customize the design and layout

Make the writing tool simple and focused.

Use a split-screen layout. Place inputs on one side and the generated draft on the other so users can iterate quickly.
Add clear template cards. Content type cards make it easy for users to choose what they want to generate.
Highlight copy and regenerate buttons. These actions are central to the writing workflow.
Optimize for mobile. Users may generate captions, emails, or quick drafts from their phones.

Use the select-and-edit feature in Hostinger Horizons to refine forms, output boxes, and template sections.

Step 6: Add logic, calculations, or scoring

AI writers benefit from formatting rules and quality checks.

Template-based generation logic. Adjust the output structure based on whether the user selects blog post, email, ad, or product description.
Tone matching logic. Make the generated copy follow the selected style so outputs feel consistent.
Length control. Let users choose short, medium, or detailed outputs depending on where the content will be used.
Readability or quality checklist. Show whether the draft includes the topic, audience, CTA, or target keywords.

Prompt example:

“Add content templates for blog posts, emails, ads, and social captions, each with tone and length controls.”

Step 7: Test your AI writer before publishing

Test the tool with different content types.

Generate a blog outline, product description, email, and social caption to make sure each output follows the correct structure.

Checklist:

Templates generate different formats. Blog posts, emails, and ads should not look the same.
Tone controls work clearly. Professional, friendly, and persuasive outputs should feel distinct.
Generated text is editable. Users should be able to refine the draft before copying it.
Copy and save actions work. The finished text should be easy to reuse.

If issues appear, use follow-up prompts in Hostinger Horizons to improve output formatting or UI flow.

Once the AI writer works properly, click Publish.

You can host it on your own domain and share it as a writing assistant, marketing tool, or lead magnet.

Common use cases include:

Blog writing assistants.
Email copy generators.
Social media caption tools.
Product description generators.
Ad copy generators.

Step 9: Improve your AI writer after launch

Once users start generating content, improve the tool based on their needs.

Possible upgrades include:

Saved draft history.
SEO keyword suggestions.
Brand voice presets.
Team templates.
Export to DOCX or PDF.

These improvements can be added through follow-up prompts in Hostinger Horizons.

Why should you create AI writer?

An AI writer web app helps users create content faster and with less friction.

It allows users to:

Generate first drafts quickly.
Create content in different formats.
Maintain a consistent tone.
Reduce blank-page pressure.
Repurpose ideas into multiple channels.

AI writers are useful for marketers, bloggers, creators, agencies, freelancers, small businesses, and content teams.

What features should a good AI writer include?

Content templates. Users should be able to generate different formats like blogs, emails, ads, and social posts.
Tone controls. Tone settings help adapt the copy for different audiences and channels.
Editable output area. Users need to refine generated content before publishing or sending it.
Copy, save, and regenerate buttons. These actions make the writing workflow faster.
Brand voice options. Saved style preferences help teams keep content consistent.

What initial prompt should you use to build AI writer in Horizons?

Use the prompt below in Hostinger Horizons to generate your AI writer web app. Simply copy and paste it into the chat to create your first working version instantly. As you build, you can add follow-up prompts to adjust templates, tone controls, layout, or export options based on your writing workflow using vibe coding.

Prompt template:

Create an AI writer web app.
Allow users to choose a content type such as blog post, email, ad copy, product description, or social media caption.
Include input fields for topic, target audience, key points, tone, length, and keywords.
Generate editable written content based on the selected format.
Add buttons to regenerate, copy, save, and clear the output.
Include tone options such as professional, friendly, persuasive, casual, and concise.
Make the design clean, modern, focused, and mobile-friendly.

Pre-filled prompt template:

Create an AI writer web app for marketers and small businesses.
Include templates for blog outlines, promotional emails, landing page copy, product descriptions, and social posts.
Allow users to enter brand name, audience, offer, key benefit, tone, and call to action.
Generate polished copy in an editable output panel.
Add copy-to-clipboard, regenerate, and save draft buttons.
Include a brand voice selector with options for professional, warm, bold, and playful.
Make the interface simple, fast, and mobile-responsive.

What are common mistakes to avoid when building AI writer?

AI writing tools should make drafting easier, not more confusing.

Too few content templates. Users need clear starting points for emails, blogs, ads, and other formats.
No tone controls. Without tone options, outputs may not match the user’s audience or brand.
Generic prompt fields. Specific inputs like audience, key benefit, and CTA produce stronger writing.
No editing area. Users should be able to refine the generated draft before copying it.
No save or history feature. Draft history helps users return to ideas later.
Overcomplicated interface. The tool should feel like a fast writing assistant, not a complex publishing platform.

How can you leverage Hostinger Horizons to build AI writer?

Use AI chat to refine writing templates. Add formats like blogs, emails, ads, product descriptions, or social captions through prompts.
Improve the writing workflow quickly. Adjust input fields, output panels, and action buttons without coding.
Add brand voice features. Let users save tone preferences, audience details, or reusable style rules.
Scale into a content tools platform. Combine AI writing with slogan generation, image generation, email signatures, and landing page builders.

What other tools can you build with Hostinger Horizons?

Create AI slogan generator. Help users generate short brand slogans for campaigns, products, and landing pages.
Create AI image generator. Let users create custom visuals from text prompts for blog posts, ads, and social content.
Create AI email signature generator. Generate branded email signatures with logos, contact details, and social links.
Create social media scheduler. Plan, schedule, and manage posts generated from AI writing workflows.
Create cover letter generator. Help users generate tailored cover letters from resumes and job descriptions.

The author

Dainius Kavoliunas

Dainius Kavoliunas is the Head of Product for Hostinger Horizons, with a passion for building innovative solutions. As an expert in product management, he combines deep expertise in UX, experimentation, and data analysis with a technical background to lead product strategy and build strong teams. He is particularly excited about the practical applications of AI and its potential to transform how we work and live. Follow him on LinkedIn.