> ## Documentation Index
> Fetch the complete documentation index at: https://docs.handtextai.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Introduction

> Generate realistic handwritten PNGs and print-ready PDFs from plain text.

HandTextAI turns plain text into realistic handwriting for cards, letters, and envelopes.

## Base URL

All public API endpoints are under:

`https://api.handtextai.com/api/v1`

## What you can do

* **Generate PNG** (transparent background) for easy overlay and digital use
* **Generate PDF** (white background) for print workflows (crop/bleed/trim boxes, PDF/X-1a option)
* **Preview** your settings with a **watermarked 1200px-wide** PNG
* Fetch the font catalog via numeric `font_id` values (1–90)
* Run **Batch Generation** (CSV + templates) via the dashboard ([Batch Generation](guides/batch-generation))

## Key concepts (important)

* **Authentication:** send your API key as a Bearer token (`Authorization: Bearer htext_...`).
* **Single-page output:** the renderer produces a single page. If your text overflows the available content height, remaining lines are not rendered.
* **DPI scaling rule:** all pixel parameters (margins, font sizes, spacing) are specified at a **300 DPI baseline** and automatically scaled when you set `dpi: 600`.

Next: head to the [Quickstart](quickstart) or open the **API Reference** tab.