> For the complete documentation index, see [llms.txt](https://docs.viesus.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.viesus.com/installation/pdf.md).

# PDF Enhancer

Install the VIESUS PDF Enhancer on Windows and Linux. Includes GPU and CPU variants, verification steps, and release notes.

The PDF Enhancer is a **separate installer** that requires an already installed and licensed [CLI & Viewer](/installation/cli.md) base package.

See [System Requirements](/installation/requirements.md) for hardware, OS, and GPU requirements.

***

## Installation

Download the PDF Enhancer from the [VIESUS Transfer Portal](https://transfer.viesus.com), then follow the steps for your platform.

{% tabs %}
{% tab title="Windows" %}
Download `VIESUS_PDFEnhancer_<PDF_VERSION>_VIESUS_<VERSION>.exe`, then right-click it and choose **Run as administrator**.

{% hint style="info" %}
Replace `<PDF_VERSION>` and `<VERSION>` with the version numbers shown on the Transfer Portal download page.
{% endhint %}

{% stepper %}
{% step %}

#### Accept the license agreement

Read and accept the End-User License Agreement, then click **Next**.
{% endstep %}

{% step %}

#### Select components

The default **Full installation** includes VIESUS Tools and VIESUS PDFEnhancer. Click **Next**.
{% endstep %}

{% step %}

#### Additional tasks

Optionally check **Create desktop icons**, then click **Next**.
{% endstep %}

{% step %}

#### Ready to install

Review the summary of selected components and tasks, then click **Install**.
{% endstep %}

{% step %}

#### Wait for installation to complete

Wait while the installer extracts and installs all files.
{% endstep %}

{% step %}

#### Finish

Click **Finish** to exit the Setup Wizard.
{% endstep %}
{% endstepper %}

#### Verify the installation

Launching the program from the Start Menu runs it in **hotfolder mode**, displaying the viesusPDF version, build date, and VIESUS library version.

<figure><img src="https://919968377-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FG3eQlcnlDKtn9yl3mxsx%2Fuploads%2Fgit-blob-73d1736db99011087f65adde95278904df580d18%2Fwindows_installed_startmenu.jpg?alt=media" alt="VIESUS PDF Enhancer in the Windows Start Menu"><figcaption></figcaption></figure>

<figure><img src="https://919968377-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FG3eQlcnlDKtn9yl3mxsx%2Fuploads%2Fgit-blob-9f7b859de6ac09447ad8196072c9d3b8a00ba322%2Finstall_win_hotfolderstart.png?alt=media" alt="PDF Enhancer hotfolder mode start screen"><figcaption></figcaption></figure>

You can also verify from the command line. Open `cmd.exe` as administrator, navigate to the install directory, and run `viesusPDF.exe -v`:

```powershell
"C:\Program Files\Imaging Solutions\VIESUS\PDFEnhancer\viesusPDF.exe" -v
```

Expected output:

```powershell
VIESUS PDFEnhancer Application X.XX.XX 64 bit
VIESUS X.XX.XX win x86_64 bit
Copyright (c) Viesus AG, 2011-2026
```

{% endtab %}

{% tab title="Linux" %}
Download `viesuspdf_<PDF_VERSION>_amd64.deb` from the [VIESUS Transfer Portal](https://transfer.viesus.com), then install:

```bash
sudo dpkg -i viesuspdf_<PDF_VERSION>_amd64.deb

sudo apt-get install -f   # resolve any dependencies

# Verify
/usr/local/viesuspdf/bin/viesuspdf -v
```

Expected output:

```powershell
viesus@viesus-ddm:~$ /usr/local/viesuspdf/bin/viesuspdf -v
Starting of /usr/local/viesuspdf/bin/viesuspdf
AppDataPath is /usr/local/viesuspdf/bin
viesusPDF X.XX.XX 64 bit - Build <TIME_STAMP>
VIESUS X.XX.XX IW GPU lin x86_ 64 bit - Build <TIME_STAMP> GCb
Copyright (c) Viesus AG, <YEAR>
```

{% endtab %}
{% endtabs %}

***

## Changelog (selected versions)

| Version | VIESUS   | Key changes                                                                            |
| ------- | -------- | -------------------------------------------------------------------------------------- |
| 4.06.00 | 13.00.00 |                                                                                        |
| 4.05.00 | 12.00.00 |                                                                                        |
| 4.04.04 | 11.00.01 | Handles PDF page dimensions beyond 32,767 pt; improved ICC profile handling            |
| 4.04.02 | 11.00.01 | Artifact removal added to resizing; soft mask resizing; stream reading for JPEG        |
| 4.04.00 | 11.00.00 | `justAnalyze` option added                                                             |
| 4.03.00 | 10.00.00 | `noResize`, `-r targetRes`, `-T resizeThres` options; `viesusini.json` replaces `.ini` |
| 4.00.00 | —        | 64-bit; Linux port; GUID licensing                                                     |


---

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