How to embed a TrueType font in a PDF in C#

Register the font from disk and use it on the page

If you already have the font file on disk, register it once for the document and use the returned font object for page text.

using ZingPDF;
using ZingPDF.Graphics;
using ZingPDF.Syntax.CommonDataStructures;

using var pdf = Pdf.Create();
var page = await pdf.GetPageAsync(1);
var font = await pdf.RegisterTrueTypeFontAsync("NotoSans-Regular.ttf");

await page.AddTextAsync(
    "Custom font text",
    Rectangle.FromDimensions(240, 80),
    font,
    18,
    RGBColour.Black);

await pdf.SaveAsync(File.Create("truetype-font.pdf"));

Register from a stream if the font does not live on disk

If your font comes from storage, a database, or another service, use the stream overload instead.

using var fontStream = File.OpenRead("NotoSans-Regular.ttf");
var font = await pdf.RegisterTrueTypeFontAsync(fontStream);

Use this path when the font choice matters

Embedded TrueType fonts are the right fit when the output needs a brand font, a specific document look, or a font file that is part of your application.

If Helvetica, Times, or Courier are enough, the standard font helpers keep the write path smaller.

Current text encoding note

The current high-level text path targets WinAnsi or Windows-1252 text. If your output needs a broader text range, test the exact characters you intend to write before you rely on the result.