Hello World

The simplest compose2pdf example – render text to a PDF in three lines.

Full code 

import com.chrisjenx.compose2pdf.renderToPdf
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.Spacer
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.height
import androidx.compose.foundation.layout.padding
import androidx.compose.material.Text
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.unit.dp
import androidx.compose.ui.unit.sp
import java.io.File

fun main() {
    val pdfBytes = renderToPdf {
        Column(Modifier.fillMaxSize().padding(32.dp)) {
            Text("Hello, PDF!", fontSize = 28.sp)
            Spacer(Modifier.height(8.dp))
            Text(
                "Generated with compose2pdf",
                fontSize = 14.sp,
                color = Color.Gray,
            )
        }
    }
    File("hello.pdf").writeBytes(pdfBytes)
    println("Created hello.pdf (${pdfBytes.size / 1024} KB)")
}

Walkthrough

1. Call renderToPdf 

val pdfBytes = renderToPdf {
    // Compose content here
}

With no parameters, you get:

  • A4 page size (595 x 842 points)
  • No margins (content fills the full page)
  • Vector rendering (text is selectable)
  • Inter font (bundled, auto-embedded)
  • 2x density (good balance of quality and memory)

2. Write Compose content 

Column(Modifier.fillMaxSize().padding(32.dp)) {
    Text("Hello, PDF!", fontSize = 28.sp)
    Spacer(Modifier.height(8.dp))
    Text("Generated with compose2pdf", fontSize = 14.sp, color = Color.Gray)
}

Standard Compose layout – Column stacks items vertically, Modifier.fillMaxSize() fills the page, padding(32.dp) adds inset from the edges.

3. Save the result 

File("hello.pdf").writeBytes(pdfBytes)

renderToPdf returns a ByteArray – write it to a file, send it over HTTP, or process it further.

Output

Hello PDF output

Download PDF

  • A single A4 page with vector text
  • Text is selectable in any PDF viewer
  • File size: ~8 KB

Next steps