gpdf

Business Documents

Invoice

Professional invoice with company header, billing details, itemized table, and totals.

doc := template.New(
    template.WithPageSize(document.A4),
    template.WithMargins(document.UniformEdges(document.Mm(20))),
    template.WithMetadata(document.DocumentMetadata{
        Title:  "Invoice #INV-2026-001",
        Author: "ACME Corporation",
    }),
)

page := doc.AddPage()

// Company header
page.AutoRow(func(r *template.RowBuilder) {
    r.Col(6, func(c *template.ColBuilder) {
        c.Text("ACME Corporation", template.FontSize(24), template.Bold(),
            template.TextColor(pdf.RGBHex(0x1A237E)))
        c.Text("123 Business Street")
        c.Text("Suite 100")
        c.Text("San Francisco, CA 94105")
    })
    r.Col(6, func(c *template.ColBuilder) {
        c.Text("INVOICE", template.FontSize(28), template.Bold(), template.AlignRight(),
            template.TextColor(pdf.RGBHex(0x1A237E)))
        c.Spacer(document.Mm(3))
        c.Text("#INV-2026-001", template.AlignRight(), template.FontSize(12))
        c.Text("Date: March 1, 2026", template.AlignRight())
        c.Text("Due: March 31, 2026", template.AlignRight())
    })
})

// Separator
page.AutoRow(func(r *template.RowBuilder) {
    r.Col(12, func(c *template.ColBuilder) {
        c.Spacer(document.Mm(5))
        c.Line(template.LineColor(pdf.RGBHex(0x1A237E)), template.LineThickness(document.Pt(2)))
        c.Spacer(document.Mm(5))
    })
})

// Bill to
page.AutoRow(func(r *template.RowBuilder) {
    r.Col(6, func(c *template.ColBuilder) {
        c.Text("Bill To:", template.Bold(), template.TextColor(pdf.Gray(0.4)))
        c.Spacer(document.Mm(2))
        c.Text("John Smith", template.Bold())
        c.Text("Tech Solutions Inc.")
        c.Text("456 Client Avenue")
        c.Text("New York, NY 10001")
    })
    r.Col(6, func(c *template.ColBuilder) {
        c.Text("Payment Info:", template.Bold(), template.TextColor(pdf.Gray(0.4)))
        c.Spacer(document.Mm(2))
        c.Text("Bank: First National Bank")
        c.Text("Account: 1234-5678-9012")
        c.Text("Routing: 021000021")
    })
})

page.AutoRow(func(r *template.RowBuilder) {
    r.Col(12, func(c *template.ColBuilder) {
        c.Spacer(document.Mm(10))
    })
})

// Items table
headerBlue := pdf.RGBHex(0x1A237E)
stripeGray := pdf.RGBHex(0xF5F5F5)

page.AutoRow(func(r *template.RowBuilder) {
    r.Col(12, func(c *template.ColBuilder) {
        c.Table(
            []string{"Description", "Qty", "Unit Price", "Amount"},
            [][]string{
                {"Web Development - Frontend", "40 hrs", "$150.00", "$6,000.00"},
                {"Web Development - Backend", "60 hrs", "$150.00", "$9,000.00"},
                {"UI/UX Design", "20 hrs", "$120.00", "$2,400.00"},
                {"Database Design", "15 hrs", "$130.00", "$1,950.00"},
                {"QA Testing", "25 hrs", "$100.00", "$2,500.00"},
                {"Project Management", "10 hrs", "$140.00", "$1,400.00"},
            },
            template.ColumnWidths(40, 15, 20, 25),
            template.TableHeaderStyle(
                template.TextColor(pdf.White),
                template.BgColor(headerBlue),
            ),
            template.TableStripe(stripeGray),
        )
    })
})

page.AutoRow(func(r *template.RowBuilder) {
    r.Col(12, func(c *template.ColBuilder) {
        c.Spacer(document.Mm(5))
    })
})

// Totals
page.AutoRow(func(r *template.RowBuilder) {
    r.Col(8, func(c *template.ColBuilder) {
        // empty left side
    })
    r.Col(4, func(c *template.ColBuilder) {
        c.Text("Subtotal:    $23,250.00", template.AlignRight())
        c.Text("Tax (10%):    $2,325.00", template.AlignRight())
        c.Spacer(document.Mm(2))
        c.Line(template.LineThickness(document.Pt(1)))
        c.Spacer(document.Mm(2))
        c.Text("Total:       $25,575.00", template.AlignRight(),
            template.Bold(), template.FontSize(14))
    })
})

page.AutoRow(func(r *template.RowBuilder) {
    r.Col(12, func(c *template.ColBuilder) {
        c.Spacer(document.Mm(15))
        c.Line(template.LineColor(pdf.Gray(0.8)))
        c.Spacer(document.Mm(3))
        c.Text("Thank you for your business!", template.AlignCenter(),
            template.Italic(), template.TextColor(pdf.Gray(0.5)))
    })
})
Download

Report

Multi-page quarterly report with headers, footers, key metrics, revenue and expense tables.

doc := template.New(
    template.WithPageSize(document.A4),
    template.WithMargins(document.UniformEdges(document.Mm(20))),
    template.WithMetadata(document.DocumentMetadata{
        Title:   "Quarterly Report Q1 2026",
        Author:  "ACME Corporation",
        Subject: "Q1 2026 Financial Summary",
    }),
)

// Header for all pages
doc.Header(func(p *template.PageBuilder) {
    p.AutoRow(func(r *template.RowBuilder) {
        r.Col(6, func(c *template.ColBuilder) {
            c.Text("ACME Corp", template.Bold(), template.FontSize(9),
                template.TextColor(pdf.RGBHex(0x1565C0)))
        })
        r.Col(6, func(c *template.ColBuilder) {
            c.Text("Q1 2026 Report", template.AlignRight(), template.FontSize(9),
                template.TextColor(pdf.Gray(0.5)))
        })
    })
    p.AutoRow(func(r *template.RowBuilder) {
        r.Col(12, func(c *template.ColBuilder) {
            c.Line(template.LineColor(pdf.RGBHex(0x1565C0)))
            c.Spacer(document.Mm(3))
        })
    })
})

// Footer for all pages
doc.Footer(func(p *template.PageBuilder) {
    p.AutoRow(func(r *template.RowBuilder) {
        r.Col(12, func(c *template.ColBuilder) {
            c.Spacer(document.Mm(3))
            c.Line(template.LineColor(pdf.Gray(0.8)))
            c.Spacer(document.Mm(2))
        })
    })
    p.AutoRow(func(r *template.RowBuilder) {
        r.Col(12, func(c *template.ColBuilder) {
            c.Text("Confidential - For Internal Use Only",
                template.AlignCenter(), template.FontSize(7), template.TextColor(pdf.Gray(0.5)))
        })
    })
})

// --- Page 1: Title & Executive Summary ---
page1 := doc.AddPage()

page1.AutoRow(func(r *template.RowBuilder) {
    r.Col(12, func(c *template.ColBuilder) {
        c.Spacer(document.Mm(20))
        c.Text("Quarterly Report", template.FontSize(28), template.Bold(),
            template.AlignCenter(), template.TextColor(pdf.RGBHex(0x1A237E)))
        c.Text("Q1 2026 - Financial Summary", template.FontSize(16),
            template.AlignCenter(), template.TextColor(pdf.Gray(0.4)))
        c.Spacer(document.Mm(15))
        c.Line(template.LineColor(pdf.RGBHex(0x1A237E)), template.LineThickness(document.Pt(2)))
        c.Spacer(document.Mm(10))
    })
})

page1.AutoRow(func(r *template.RowBuilder) {
    r.Col(12, func(c *template.ColBuilder) {
        c.Text("Executive Summary", template.FontSize(16), template.Bold())
        c.Spacer(document.Mm(3))
        c.Text("This report presents the financial performance of ACME Corporation " +
            "for the first quarter of 2026. Revenue increased by 15% compared to Q4 2025, " +
            "driven primarily by strong growth in the cloud services division. " +
            "Operating margins improved to 22%, up from 19% in the previous quarter.")
        c.Spacer(document.Mm(5))
        c.Text("Key highlights include the successful launch of three new product lines, " +
            "expansion into the European market, and a 20% reduction in customer churn rate. " +
            "The company remains well-positioned for continued growth throughout 2026.")
    })
})

// Key metrics in grid
page1.AutoRow(func(r *template.RowBuilder) {
    r.Col(12, func(c *template.ColBuilder) {
        c.Spacer(document.Mm(10))
        c.Text("Key Metrics", template.FontSize(14), template.Bold())
        c.Spacer(document.Mm(3))
    })
})

page1.AutoRow(func(r *template.RowBuilder) {
    r.Col(3, func(c *template.ColBuilder) {
        c.Text("Revenue", template.TextColor(pdf.Gray(0.5)), template.FontSize(9))
        c.Text("$12.5M", template.FontSize(18), template.Bold(),
            template.TextColor(pdf.RGBHex(0x2E7D32)))
    })
    r.Col(3, func(c *template.ColBuilder) {
        c.Text("Growth", template.TextColor(pdf.Gray(0.5)), template.FontSize(9))
        c.Text("+15%", template.FontSize(18), template.Bold(),
            template.TextColor(pdf.RGBHex(0x2E7D32)))
    })
    r.Col(3, func(c *template.ColBuilder) {
        c.Text("Customers", template.TextColor(pdf.Gray(0.5)), template.FontSize(9))
        c.Text("2,450", template.FontSize(18), template.Bold(),
            template.TextColor(pdf.RGBHex(0x1565C0)))
    })
    r.Col(3, func(c *template.ColBuilder) {
        c.Text("Margin", template.TextColor(pdf.Gray(0.5)), template.FontSize(9))
        c.Text("22%", template.FontSize(18), template.Bold(),
            template.TextColor(pdf.RGBHex(0x1565C0)))
    })
})

// --- Page 2: Financial Details ---
page2 := doc.AddPage()

page2.AutoRow(func(r *template.RowBuilder) {
    r.Col(12, func(c *template.ColBuilder) {
        c.Text("Revenue Breakdown", template.FontSize(16), template.Bold())
        c.Spacer(document.Mm(5))
    })
})

darkHeader := pdf.RGBHex(0x1A237E)
stripe := pdf.RGBHex(0xF5F5F5)

page2.AutoRow(func(r *template.RowBuilder) {
    r.Col(12, func(c *template.ColBuilder) {
        c.Table(
            []string{"Division", "Q1 2026", "Q4 2025", "Change"},
            [][]string{
                {"Cloud Services", "$5,200,000", "$4,100,000", "+26.8%"},
                {"Enterprise Software", "$3,800,000", "$3,500,000", "+8.6%"},
                {"Consulting", "$2,100,000", "$1,900,000", "+10.5%"},
                {"Support & Maintenance", "$1,400,000", "$1,350,000", "+3.7%"},
            },
            template.ColumnWidths(35, 22, 22, 21),
            template.TableHeaderStyle(
                template.TextColor(pdf.White),
                template.BgColor(darkHeader),
            ),
            template.TableStripe(stripe),
        )
        c.Spacer(document.Mm(10))
    })
})

page2.AutoRow(func(r *template.RowBuilder) {
    r.Col(12, func(c *template.ColBuilder) {
        c.Text("Expense Summary", template.FontSize(16), template.Bold())
        c.Spacer(document.Mm(5))
    })
})

page2.AutoRow(func(r *template.RowBuilder) {
    r.Col(12, func(c *template.ColBuilder) {
        c.Table(
            []string{"Category", "Amount", "% of Revenue"},
            [][]string{
                {"Personnel", "$5,500,000", "44.0%"},
                {"Infrastructure", "$1,800,000", "14.4%"},
                {"Marketing", "$1,200,000", "9.6%"},
                {"R&D", "$950,000", "7.6%"},
                {"General & Admin", "$300,000", "2.4%"},
            },
            template.ColumnWidths(40, 30, 30),
            template.TableHeaderStyle(
                template.TextColor(pdf.White),
                template.BgColor(darkHeader),
            ),
            template.TableStripe(stripe),
        )
        c.Spacer(document.Mm(10))
    })
})

// Two-column commentary
page2.AutoRow(func(r *template.RowBuilder) {
    r.Col(6, func(c *template.ColBuilder) {
        c.Text("Highlights", template.Bold(), template.TextColor(pdf.RGBHex(0x2E7D32)))
        c.Spacer(document.Mm(2))
        c.Text("Cloud services revenue grew 26.8%, exceeding projections by 5%. " +
            "New enterprise clients added: 47.")
    })
    r.Col(6, func(c *template.ColBuilder) {
        c.Text("Challenges", template.Bold(), template.TextColor(pdf.RGBHex(0xC62828)))
        c.Spacer(document.Mm(2))
        c.Text("Infrastructure costs rose 12% due to scaling needs. " +
            "Two major client renewals deferred to Q2.")
    })
})
Download

QR Code

Generate QR codes with configurable size and error correction levels.

doc := template.New(
    template.WithPageSize(document.A4),
    template.WithMargins(document.UniformEdges(document.Mm(20))),
    template.WithMetadata(document.DocumentMetadata{
        Title:  "QR Code Examples",
        Author: "gpdf",
    }),
)

page := doc.AddPage()

page.AutoRow(func(r *template.RowBuilder) {
    r.Col(12, func(c *template.ColBuilder) {
        c.Text("QR Code Examples", template.FontSize(18), template.Bold())
        c.Spacer(document.Mm(5))
    })
})

// Basic QR code
page.AutoRow(func(r *template.RowBuilder) {
    r.Col(12, func(c *template.ColBuilder) {
        c.Text("Basic QR code (URL):")
        c.Spacer(document.Mm(2))
        c.QRCode("https://gpdf.dev")
        c.Spacer(document.Mm(5))
    })
})

// QR codes with different sizes side by side
page.AutoRow(func(r *template.RowBuilder) {
    r.Col(12, func(c *template.ColBuilder) {
        c.Text("QR codes with different sizes:")
        c.Spacer(document.Mm(2))
    })
})

page.AutoRow(func(r *template.RowBuilder) {
    r.Col(4, func(c *template.ColBuilder) {
        c.Text("20mm", template.FontSize(9), template.TextColor(pdf.Gray(0.4)))
        c.QRCode("https://gpdf.dev", template.QRSize(document.Mm(20)))
    })
    r.Col(4, func(c *template.ColBuilder) {
        c.Text("30mm", template.FontSize(9), template.TextColor(pdf.Gray(0.4)))
        c.QRCode("https://gpdf.dev", template.QRSize(document.Mm(30)))
    })
    r.Col(4, func(c *template.ColBuilder) {
        c.Text("40mm", template.FontSize(9), template.TextColor(pdf.Gray(0.4)))
        c.QRCode("https://gpdf.dev", template.QRSize(document.Mm(40)))
    })
})

page.AutoRow(func(r *template.RowBuilder) {
    r.Col(12, func(c *template.ColBuilder) {
        c.Spacer(document.Mm(5))
    })
})

// QR codes with different EC levels
page.AutoRow(func(r *template.RowBuilder) {
    r.Col(12, func(c *template.ColBuilder) {
        c.Text("Error correction levels (L / M / Q / H):")
        c.Spacer(document.Mm(2))
    })
})

page.AutoRow(func(r *template.RowBuilder) {
    r.Col(3, func(c *template.ColBuilder) {
        c.Text("Level L", template.FontSize(9))
        c.QRCode("HELLO", template.QRSize(document.Mm(25)),
            template.QRErrorCorrection(qrcode.LevelL))
    })
    r.Col(3, func(c *template.ColBuilder) {
        c.Text("Level M", template.FontSize(9))
        c.QRCode("HELLO", template.QRSize(document.Mm(25)),
            template.QRErrorCorrection(qrcode.LevelM))
    })
    r.Col(3, func(c *template.ColBuilder) {
        c.Text("Level Q", template.FontSize(9))
        c.QRCode("HELLO", template.QRSize(document.Mm(25)),
            template.QRErrorCorrection(qrcode.LevelQ))
    })
    r.Col(3, func(c *template.ColBuilder) {
        c.Text("Level H", template.FontSize(9))
        c.QRCode("HELLO", template.QRSize(document.Mm(25)),
            template.QRErrorCorrection(qrcode.LevelH))
    })
})

page.AutoRow(func(r *template.RowBuilder) {
    r.Col(12, func(c *template.ColBuilder) {
        c.Spacer(document.Mm(5))
    })
})

// Japanese content
page.AutoRow(func(r *template.RowBuilder) {
    r.Col(12, func(c *template.ColBuilder) {
        c.Text("Japanese content:")
        c.Spacer(document.Mm(2))
        c.QRCode("こんにちは世界", template.QRSize(document.Mm(30)))
    })
})
Download

Barcode

Code 128 barcodes with configurable width and height.

doc := template.New(
    template.WithPageSize(document.A4),
    template.WithMargins(document.UniformEdges(document.Mm(20))),
    template.WithMetadata(document.DocumentMetadata{
        Title:  "Barcode Examples",
        Author: "gpdf",
    }),
)

page := doc.AddPage()

page.AutoRow(func(r *template.RowBuilder) {
    r.Col(12, func(c *template.ColBuilder) {
        c.Text("Barcode Examples", template.FontSize(18), template.Bold())
        c.Spacer(document.Mm(5))
    })
})

// Basic barcode
page.AutoRow(func(r *template.RowBuilder) {
    r.Col(12, func(c *template.ColBuilder) {
        c.Text("Code 128 barcode:")
        c.Spacer(document.Mm(2))
        c.Barcode("INV-2026-0001")
        c.Spacer(document.Mm(5))
    })
})

// Barcodes with explicit sizes
page.AutoRow(func(r *template.RowBuilder) {
    r.Col(12, func(c *template.ColBuilder) {
        c.Text("With display width (80mm):")
        c.Spacer(document.Mm(2))
        c.Barcode("PRODUCT-A-12345", template.BarcodeWidth(document.Mm(80)))
        c.Spacer(document.Mm(5))
    })
})

page.AutoRow(func(r *template.RowBuilder) {
    r.Col(12, func(c *template.ColBuilder) {
        c.Text("With display height (10mm):")
        c.Spacer(document.Mm(2))
        c.Barcode("SMALL-BAR", template.BarcodeHeight(document.Mm(10)))
        c.Spacer(document.Mm(5))
    })
})

// Numeric data (optimized with Code C)
page.AutoRow(func(r *template.RowBuilder) {
    r.Col(12, func(c *template.ColBuilder) {
        c.Text("Numeric data (Code C optimization):")
        c.Spacer(document.Mm(2))
        c.Barcode("1234567890")
        c.Spacer(document.Mm(5))
    })
})

// Barcodes in columns
page.AutoRow(func(r *template.RowBuilder) {
    r.Col(12, func(c *template.ColBuilder) {
        c.Text("Barcodes in columns:")
        c.Spacer(document.Mm(2))
    })
})

page.AutoRow(func(r *template.RowBuilder) {
    r.Col(6, func(c *template.ColBuilder) {
        c.Text("Item A", template.FontSize(9))
        c.Barcode("ITEM-A-001", template.BarcodeWidth(document.Mm(60)))
    })
    r.Col(6, func(c *template.ColBuilder) {
        c.Text("Item B", template.FontSize(9))
        c.Barcode("ITEM-B-002", template.BarcodeWidth(document.Mm(60)))
    })
})
Download

QR Code + Barcode Invoice

Professional invoice combining QR code for online payment and barcode for reference scanning.

doc := template.New(
    template.WithPageSize(document.A4),
    template.WithMargins(document.UniformEdges(document.Mm(20))),
    template.WithMetadata(document.DocumentMetadata{
        Title:  "Invoice with QR/Barcode",
        Author: "ACME Corporation",
    }),
)

page := doc.AddPage()

// Header with QR code
page.AutoRow(func(r *template.RowBuilder) {
    r.Col(8, func(c *template.ColBuilder) {
        c.Text("ACME Corporation", template.FontSize(22), template.Bold(),
            template.TextColor(pdf.RGBHex(0x1A237E)))
        c.Text("Invoice #INV-2026-042", template.FontSize(12),
            template.TextColor(pdf.Gray(0.4)))
    })
    r.Col(4, func(c *template.ColBuilder) {
        c.QRCode("https://pay.acme.com/inv/2026-042",
            template.QRSize(document.Mm(30)),
            template.QRErrorCorrection(qrcode.LevelH))
    })
})

page.AutoRow(func(r *template.RowBuilder) {
    r.Col(12, func(c *template.ColBuilder) {
        c.Spacer(document.Mm(3))
        c.Line(template.LineColor(pdf.RGBHex(0x1A237E)),
            template.LineThickness(document.Pt(2)))
        c.Spacer(document.Mm(5))
    })
})

// Bill to
page.AutoRow(func(r *template.RowBuilder) {
    r.Col(6, func(c *template.ColBuilder) {
        c.Text("Bill To:", template.Bold(), template.TextColor(pdf.Gray(0.4)))
        c.Spacer(document.Mm(2))
        c.Text("Jane Doe", template.Bold())
        c.Text("Tech Solutions Inc.")
        c.Text("456 Client Avenue")
        c.Text("New York, NY 10001")
    })
    r.Col(6, func(c *template.ColBuilder) {
        c.Text("Date: March 1, 2026", template.AlignRight())
        c.Text("Due: March 31, 2026", template.AlignRight())
    })
})

page.AutoRow(func(r *template.RowBuilder) {
    r.Col(12, func(c *template.ColBuilder) {
        c.Spacer(document.Mm(8))
    })
})

// Items table
page.AutoRow(func(r *template.RowBuilder) {
    r.Col(12, func(c *template.ColBuilder) {
        c.Table(
            []string{"Description", "Qty", "Price", "Amount"},
            [][]string{
                {"Web Development", "40 hrs", "$150.00", "$6,000.00"},
                {"UI/UX Design", "20 hrs", "$120.00", "$2,400.00"},
                {"QA Testing", "15 hrs", "$100.00", "$1,500.00"},
            },
            template.ColumnWidths(40, 15, 20, 25),
            template.TableHeaderStyle(
                template.TextColor(pdf.White),
                template.BgColor(pdf.RGBHex(0x1A237E)),
            ),
            template.TableStripe(pdf.RGBHex(0xF5F5F5)),
        )
    })
})

page.AutoRow(func(r *template.RowBuilder) {
    r.Col(8, func(c *template.ColBuilder) {})
    r.Col(4, func(c *template.ColBuilder) {
        c.Spacer(document.Mm(3))
        c.Text("Total:  $9,900.00", template.AlignRight(),
            template.Bold(), template.FontSize(14))
    })
})

page.AutoRow(func(r *template.RowBuilder) {
    r.Col(12, func(c *template.ColBuilder) {
        c.Spacer(document.Mm(10))
        c.Line(template.LineColor(pdf.Gray(0.8)))
        c.Spacer(document.Mm(5))
    })
})

// Barcode at bottom for scanning
page.AutoRow(func(r *template.RowBuilder) {
    r.Col(12, func(c *template.ColBuilder) {
        c.Text("Order Reference:", template.FontSize(9),
            template.TextColor(pdf.Gray(0.4)))
        c.Spacer(document.Mm(2))
        c.Barcode("INV-2026-042", template.BarcodeWidth(document.Mm(100)),
            template.BarcodeHeight(document.Mm(15)))
        c.Spacer(document.Mm(5))
        c.Text("Scan QR code to pay online", template.AlignCenter(),
            template.Italic(), template.FontSize(9),
            template.TextColor(pdf.Gray(0.5)))
    })
})
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