Ghostscript Review: Features, Installation, and Benefits

Ghostscript is an open‑source software specialized in interpreting and processing PostScript and PDF documents. It combines a PostScript interpreter layer with a graphics library, enabling conversion, rasterisation, generation, and handling of various document types. The project has been developed for over 30 years and runs on many operating systems.

Ghostscript is especially aimed at developers, system administrators, IT specialists, and companies that need to automate document operations without relying solely on a graphical interface. It can be used directly from the command line or integrated into an application as a library or SDK.

What problems does Ghostscript solve?

Automated processing of PDF and PostScript documents can become complex when many files must be converted, images generated from documents, resolution controlled, or different output formats produced.

Ghostscript provides an engine capable of handling these operations from the command line and within applications. Its design around interpreters and output devices allows transformation of document content into PDF, PostScript, EPS, images, text, XPS, or certain print‑related formats.

It can therefore meet needs such as:

• automating document conversion in a script;
• rasterising PDF or PostScript files;
• producing PNG or JPEG images from document pages;
• converting certain content to PDF or PostScript;
• controlling resolution and some compression parameters;
• generating PDF/A or PDF/X documents within supported limits;
• embedding a document‑processing engine into an application;
• analysing or transforming documents in automated production pipelines.

Ghostscript is particularly interesting when a server must perform repetitive processing without manual intervention. It can then be part of an open‑source service dedicated to automated document handling.

Key Features and Capabilities

PDF and PostScript Interpretation

Ghostscript is built to interpret the PostScript language and PDF files. The official documentation also notes that Ghostscript includes a new PDF interpreter written in C, while the GhostPDF project exists as a standalone PDF executable.

For technical teams, this means Ghostscript can serve as a document‑processing engine rather than just a file viewer. Its development also takes place within an open‑source community that contributes to its evolution.

Format Conversion and Generation

Ghostscript’s output devices are one of its main strengths. The official documentation lists devices such as pdfwrite, ps2write, eps2write, txtwrite, xpswrite, pxlmono, pxlcolor and docxwrite.

The table below summarises several documented capabilities:

Exact formats and capabilities depend on the selected device and configuration. Therefore, consult the documentation for the deployed version before building a production pipeline.

Rasterisation and Image Generation

Ghostscript can rasterise PostScript and PDF documents into various image formats. Available devices include several PNG and JPEG variants, with parameters to control resolution.

For example, the documentation provides a syntax like the following to generate PNG files from a document:

gs -sOutputFile=doc-%02d.png -sDEVICE=png16m -r300 document.pdf

The value 300 specifies the resolution in DPI. The output name can also use a page‑number pattern.

This function is useful for automatically creating previews, preparing images for an application, or feeding an image‑processing workflow.

Controlling PDF Output

The pdfwrite device offers many parameters to control PDF generation. Ghostscript documents several PDFSETTINGS, presets, such as /screen, /ebook, /printer and /prepress.

These presets should not be treated as a universal optimisation solution; results depend on the source document and the parameters used. In a professional production chain, generated files must be inspected after conversion.

PDF/A and PDF/X

Ghostscript also supports producing documents that conform to standards used for archiving and professional printing.

The documentation states that Ghostscript can create PDF/A versions 1‑3 with compliance level B, and it also documents PDF/X creation with specific version restrictions.

This capability can be valuable in environments where documents must meet precise production or archival constraints, or in an open‑source project that needs a configurable, automatable document‑processing engine.

Security and Handling Untrusted Files

Security is a major concern when a server automatically processes PDFs or PostScript files from users or external sources.

Since version 9.50, Ghostscript runs in SAFER mode by default. This mechanism restricts file access, certain devices, and specific parameters.

The documentation also notes that the -dNOSAFER option temporarily disables some protections and should be used with caution.

For a production infrastructure, it is recommended to:

• keep Ghostscript up‑to‑date;
• download versions from official sources;
• limit the process’s permissions;
• isolate untrusted‑file processing if necessary;
• avoid disabling security mechanisms without a clear reason;
• test generated files and inputs in a controlled environment;
• review security advisories and release notes before any major upgrade.

The official site maintains a section dedicated to CVEs and associated patches for released versions.

How to Install Ghostscript?

Installation on Windows

Ghostscript is distributed for Windows as a binary installer. The official documentation recommends running the installer downloaded from the releases page.

General procedure:

1. Open the official Ghostscript releases page.
2. Download the version matching your architecture.
3. Run the installer.
4. Follow the wizard’s steps.
5. Open a terminal.
6. Verify the installation with the version command available on the system.

The official FAQ also advises downloading the latest version and explains the differences between the AGPL and commercial editions.

Installation on macOS

The official documentation states that Homebrew or MacPorts can be used to install Ghostscript on macOS. It then recommends verifying the installation withc gs --version.

Example with Homebrew:

brew install ghostscript

Then:

gs --version

The version command confirms that the executable is accessible from the terminal.

Installation on Linux

Installation methods on Linux depend on the distribution. Ghostscript’s documentation notes that the project does not provide RPM packages itself and that there is an official Snap package for 64‑bit x86 Linux.

For a production‑grade installation, it is preferable to check the packages offered by the target distribution and their update cycles. When the exact version matters, official downloads and compilation documentation are the references to consult.

Use Cases for Ghostscript

Ghostscript can be relevant in many professional scenarios.

Document Automation

A server can invoke Ghostscript from a script to automatically convert incoming documents. This approach is especially suited to batch processing.

Image Generation from PDFs

A document management system can convert each page of a PDF into a PNG image at a defined resolution. Ghostscript explicitly documents this usage with its raster devices.

Preparing Documents for Printing

Conversion features, colour‑management, and output‑device support make Ghostscript useful in certain print‑and‑prepress workflows. The official site highlights advanced colour handling, raster rendering, and conversion to various formats.

Integration into Applications

Ghostscript can be called as a command‑line application or embedded directly into an application as an SDK.

This option interests developers who want PDF conversion functions inside a server‑side or business‑logic tool.

Ghostscript vs. Alternatives

Ghostscript is not the only open‑source engine for document processing. Two well‑known alternatives are MuPDF and Poppler.

MuPDF is officially presented as an open‑source framework for viewing, converting, and manipulating PDF, XPS, and e‑book documents. It also provides command‑line tools and a library for application development.

Poppler is a PDF rendering library derived from Xpdf code. Its ecosystem includes various PDF utilities and libraries.

This comparison should be understood as a high‑level overview of orientation and general capabilities, not a performance ranking. The best choice depends on input format, desired output, programming language, licensing constraints, and the intended workflow.

Advantages and disadvantages

License and Commercial Use

License considerations are crucial before any professional deployment.

Ghostscript is available under the GNU AGPL and under a commercial license offered by Artifex. The official FAQ notes that use in a closed‑source proprietary environment, certain distribution models, and some SaaS deployments may require a commercial license.

Thus, “open source” should not be equated with “free to use without any constraints in any architecture.”

Before integrating Ghostscript into a commercial product, the responsible legal or technical team must verify the obligations applicable to the specific scenario. The official documentation itself recommends reviewing the license terms and, if in doubt, contacting Artifex.

Is Ghostscript Worth Using?

For a developer or system administrator seeking a powerful PDF and PostScript processing engine, Ghostscript remains a highly attractive solution.

Its main advantage lies less in a graphical interface and more in its ability to integrate into automated processing chains. The combination of command‑line usage, numerous output devices, conversion possibilities, and application integration makes it suitable for technical environments.

However, two points must be considered before selecting it. The first concerns the complexity of the parameters, which requires a certain level of expertise to obtain reproducible results. The second concerns the license, which must be analysed according to the deployment and distribution model.

Conclusion

Ghostscript is a particularly comprehensive document‑processing engine for professional environments. It can interpret PDF and PostScript, convert documents, produce images, generate various formats, and automate complex workflows from the command line.

For developers and IT specialists, its primary strength is integrability. It can operate as a standalone tool or be embedded in an application, enabling the construction of automated document‑processing pipelines. In a professional setting, the availability of technical support may also be a factor depending on project needs and deployment mode.

Consequently, Ghostscript is an excellent choice for projects requiring a configurable, automatable PDF and PostScript engine. However, users should plan for a learning phase and carefully review licensing conditions before any commercial or SaaS deployment.