Building a Lightweight Native Notes App in Go

Goal

We are building:

• A lightweight desktop notes application

• Native Windows executable (.exe)

• No browser engine

• No Electron

• No cloud

• No database

• Simple and fast

Version 1 features:

• Window

• Text area

• Open text file

• Save text file

Step 1 — Install Go

Install Go:

https://go.dev/dl/

After installation verify:

go version

Expected:

go version go1.xx windows/amd64

Step 2 — Install VS Code

Download:

https://code.visualstudio.com/

Install extensions:

• Go (official extension)

Step 3 — Create Project Folder

Create folder:

notes-app

Open terminal inside folder.

Initialize project:

go mod init notes-app

This creates:

go.mod

Step 4 — Understand the Structure

We will keep the app simple.

Project structure:

notes-app/
│
├── main.go
├── ui.go
├── storage.go
├── go.mod

Purpose:

FilePurposemain.goApplication entry pointui.goWindow and UI logicstorage.goFile save/open logic

Step 5 — Learn These Go Concepts First

You only need these concepts initially.

Variables

name := "Ashish"

Functions

func saveNote() {
}

If Conditions

if text == "" {
}

Loops

for i := 0; i < 10; i++ {
}

Structs

type Note struct {
    Title string
    Content string
}

Packages

import "fmt"

Step 6 — Learn Basic File Handling

This is important because your notes app mainly works with files.

Learn:

Write File

os.WriteFile()

Read File

os.ReadFile()

Open File

os.Open()

Step 7 — GUI Library

We need a lightweight GUI library.

Recommended:

Fyne

Website:

https://fyne.io/

Install:

go get fyne.io/fyne/v2

Why Fyne?

• Easier than raw Win32

• Native executable

• Good for beginners

• Cross-platform

• Simple API

• Lightweight enough for your use case

Step 8 — Application Flow

The app logic will look like this:

Start App
    ↓
Create Window
    ↓
Create Text Area
    ↓
User Types Notes
    ↓
Save/Open File

Step 9 — Build the Application

Run directly:

go run .

Build executable:

go build

Output:

notes-app.exe

You can double-click and run it like a normal Windows application.

Step 10 — Version Plan

Version 1

• Window

• Text editor

• Save file

• Open file

Version 2

• Multiple notes

• Sidebar

• Search

• Auto-save

Version 3

• Markdown preview

• Tabs

• Themes

• Keyboard shortcuts

Important Advice

Do NOT overengineer this.

Avoid:

• Databases

• Networking

• APIs

• Authentication

• Sync systems

• Microservices

• Concurrency

Your first goal is simply:

Open app
→ Type notes
→ Save notes
→ Open notes later

That alone is already a complete desktop application.

Next Step

Once you:

• Install Go

• Create the project

• Install Fyne

Then the next milestone is:

Create first application window

After that:

Add multiline text editor

Then:

Save/Open files