Important

Repository Consolidated & Archived (2026-11): This package has been consolidated into $(System.Collections.Hashtable.Target) (namespace Glacier.Graphics.Pdf). Please reference the Glacier.Graphics NuGet package (v1.2.0+) for all future updates.

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TinyPdf C#

📖 Read the Deep-Dive: I built a minimal zero-dependency PDF library for C# because I hate bloat.

A minimal, Native AOT-compatible PDF creation library for .NET 10, ported from the original tinypdf by Lulzx.

Features

• Zero external dependencies & Native AOT ready (IsAotCompatible)
• Text rendering (Helvetica, Times, Courier + bold/oblique variants) with full WinAnsiEncoding typographic support (€, £, —, –, •, smart quotes, ellipsis)
• Clickable links with optional underlining
• Shapes (Rectangles, Lines, Circles, Wedges)
• JPEG images (/DCTDecode passthrough preserved under Flate compression)
• Optional Flate (deflate) compression for PDF page streams
• Markdown to PDF conversion
• Multiple pages with custom sizes

Supported framework

This project targets .NET 10.

Installation

Install the package via the .NET CLI:

dotnet add package TinyPdf

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📄 Sample Outputs: Real Rendered PDF Previews

All sample documents below are generated programmatically using TinyPdf (pure C#, zero dependencies) in sub-millisecond execution times:

Automated Business Invoice (~320 Ops)	Multi-Section Analytics Report (~56 Ops)
Vector layout, dynamic line item tables, currency formatting, and totals (0.33 ms / doc)	Headings, structured grids, shaded backgrounds, and metric summaries (0.06 ms / doc)

Vector Wedge Pie Chart (~20 Ops)	POS Thermal Receipt (~18 Ops)
Precise mathematical arc and wedge vector slices with color fills (0.05 ms / doc)	Compact monospace thermal receipt layout with barcodes and itemization (0.04 ms / doc)

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Usage

Simple PDF

using TinyPdf;

var builder = TinyPdfCreate.Create();

builder.Page(ctx => {
    ctx.Text("Hello World", 50, 700, 24);
    ctx.Rect(50, 650, 100, 20, "#FF0000");
});

byte[] pdf = builder.Build();
File.WriteAllBytes("output.pdf", pdf);

Markdown to PDF

using TinyPdf;

var options = new TinyPdfCreate.MarkdownOptions(Compress: true);
string md = "# Header\n\nThis is a paragraph — €100.\n\n- List item";
byte[] pdf = TinyPdfCreate.Markdown(md, options);
File.WriteAllBytes("markdown.pdf", pdf);

Running tests

From the repository root run:

dotnet test

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🆕 What's New in v0.2.0

• CRITICAL BUG FIX: Preserved /Filter /DCTDecode on JPEG XObjects when Compress = true — Builder.Build() previously overwrote /Filter /DCTDecode with /FlateDecode and ZLib-compressed raw JPEG bytes, corrupting embedded images whenever stream compression was enabled.
• Full WinAnsiEncoding Typographic Serialization — mapped all Windows-1252 extended code points (€, —, –, “, ”, ‘, ’, •, …, ™, etc.) to their exact single-byte WinAnsi values and transliterated common arrows/math operators (→, ≥, ≤), eliminating UTF-8 mojibake in Type 1 fonts.
• Hardened JPEG SOF0/SOF1/SOF2 Header Bounds Check and enabled IsAotCompatible + TreatWarningsAsErrors with NuGet Trusted Publishing OIDC.

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Credits

Developed by Ian Cowley and Antigravity (Google DeepMind).

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❄️ Glacier Ecosystem & Support

Part of the Glacier Ecosystem — high-performance, zero-allocation developer tooling and data engines natively built for modern C# and .NET 10.

• 🌐 Website & Documentation: glaciersoftware.dev
• ☕ Buy Me a Coffee: buymeacoffee.com/glaciersoftware
• ❤️ GitHub Sponsors: github.com/sponsors/ian-cowley
• 🐙 All Repositories: github.com/ian-cowley