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

# Introduction

# Document Transformations

Transform your documents on-the-fly using our powerful transformation system. This guide explains how to use transformations to convert, compress, and generate thumbnails from your documents.

## URL Format

Transformations are applied by adding them to the URL:

```
https://cdn.apexxcloud.com/f/{access_id}/{transformations}/path
```

For example:

```
https://cdn.apexxcloud.com/f/abc123/tr-f_pdf,q_auto:standard/documents/contract.docx
```

## Basic Format

Transformations follow a simple, consistent pattern:

```
tr-{parameter_name}_{value}
```

### Combining Transformations

Multiple parameters can be combined using commas:

```
tr-f_pdf,q_auto:standard
```

## Transformation Categories

Our document transformation system is organized into two main categories:

1. **[Format & Compression](/transformations/document/format-and-compression)** - Control document format and quality

2. **[Thumbnails](/transformations/document/thumbnails)** - Generate document previews

## Supported Formats

### Input Formats

* PDF (Portable Document Format)
* DOCX (Microsoft Word)
* XLSX (Microsoft Excel)
* PPTX (Microsoft PowerPoint)

### Output Formats

* Original format (maintain source format)
* PDF (Primary output format)
* DOCX (Microsoft Word)
* XLSX (Microsoft Excel)
* PPTX (Microsoft PowerPoint)
* Image formats for thumbnails (JPG, PNG, WebP, AVIF)