Show & Tell: go-docx v2.0.0 - Create & modify Word documents in Go

#go #word

Hi Gophers,

After months of work, I'm excited to share go-docx v2.0.0 - a production-ready library for creating and modifying Word documents in Go!

What It Does

Generate professional .docx files programmatically - perfect for reports, invoices, contracts, documentation, or any automated document workflow.

Now with document reading! Open existing .docx files, modify content, and save changes.

Key Features

Content Creation:

Paragraphs with full formatting (alignment, spacing, indentation)
Text runs (bold, italic, colors, fonts, sizes, highlights)
Advanced tables (cell merging, borders, shading, 8 built-in styles)
Images (9 formats: PNG, JPEG, GIF, SVG, etc.)
40+ built-in Word styles (Heading1-9, Title, Quote, etc.)

Document Reading (NEW!):

Open existing .docx files
Read & modify paragraphs, runs, tables
Preserve styles and formatting
Round-trip: Create -> Save -> Open -> Modify -> Save

Architecture:

Domain-driven design
Comprehensive error handling
Type-safe (no interface{})
Thread-safe with RWMutex
Zero linter warnings (30+ linters)

Quick Example

package main

import (
    "log"
    docx "github.com/mmonterroca/docxgo"
    "github.com/mmonterroca/docxgo/domain"
)

func main() {
    // Simple API - Direct
    doc := docx.NewDocument()

    para, _ := doc.AddParagraph()
    para.SetStyle(domain.StyleIDHeading1)

    run, _ := para.AddRun()
    run.SetText("Hello, World!")
    run.SetBold(true)
    run.SetColor(domain.Color{R: 0, G: 112, B: 192})

    doc.SaveAs("report.docx")
}

Builder API (Fluent & Chainable)

builder := docx.NewDocumentBuilder(
    docx.WithTitle("My Report"),
    docx.WithAuthor("Jane Doe"),
)

builder.AddParagraph().
    Text("Project Report").
    Bold().
    FontSize(16).
    Color(docx.Blue).
    Alignment(domain.AlignmentCenter).
    End()

builder.AddTable(3, 3).
    HeaderRow(true).
    Style(docx.StyleTableGrid).
    End()

doc, _ := builder.Build()
doc.SaveAs("report.docx")

Read & Modify Documents

// Open existing document
doc, _ := docx.OpenDocument("template.docx")

// Find and replace text
for _, para := range doc.Paragraphs() {
    for _, run := range para.Runs() {
        if run.Text() == "PLACEHOLDER" {
            run.SetText("Updated Value")
            run.SetBold(true)
        }
    }
}

// Add new content
newPara, _ := doc.AddParagraph()
newRun, _ := newPara.AddRun()
newRun.SetText("This was added by code")

doc.SaveAs("modified.docx")

Installation

go get github.com/mmonterroca/docxgo@v2.0.0

Resources

GitHub: https://github.com/mmonterroca/docxgo
Release Notes: https://github.com/mmonterroca/docxgo/releases/tag/v2.0.0
11 Working Examples: https://github.com/mmonterroca/docxgo/tree/master/examples
Complete Docs: https://pkg.go.dev/github.com/mmonterroca/docxgo
Migration Guide: https://github.com/mmonterroca/docxgo/blob/master/MIGRATION.md

Real-World Use Cases

Invoice/billing generation - Automated invoices with tables and company branding
Report generation - Weekly/monthly reports with charts and tables
Contract automation - Fill templates with client data
Technical documentation - Generate specs with code examples and diagrams
Academic papers - Automated formatting with citations and references