Convert PostScript (.ps) files to PDF directly in your browser. Upload single or multiple .ps files, configure PDF version, compression, metadata, page size and orientation — then download clean, standards-compliant PDFs instantly. Zero uploads, 100% private.
Upload your PostScript files, configure output settings, preview source, and download PDFs
Every setting a designer, printer, or developer needs to produce precisely configured PDF output from PostScript source files.
Upload and convert multiple .ps and .eps files simultaneously. Each file has its own progress indicator, status badge, and individual download button — full visibility and control over every file in the batch.
Choose from PDF 1.4 through PDF 2.0. Older versions ensure maximum compatibility with legacy readers and print workflows. PDF 1.7 and 2.0 support modern features like enhanced transparency and advanced colour management.
Auto-detect the page size from the PS DSC headers, or override to A4, Letter, Legal, A3, or A5. Choose portrait, landscape, or auto-detect orientation from the PostScript BoundingBox comments.
Select None, Low, Medium, or High compression for the PDF output. Higher compression means smaller file sizes at the cost of slightly longer processing time — ideal for email attachments and web delivery.
Preserve the original PS colour space, force RGB for screen viewing, force CMYK for professional print production workflows, or convert to grayscale to reduce file sizes and ink usage.
Set output resolution from 72 DPI for screen previews up to 1200 DPI for prepress-quality output. 300 DPI is the standard for commercial print; 600 DPI for high-quality laser printing and fine detail reproduction.
Set the PDF document title, author name, and subject/description before conversion. Metadata is embedded in the output PDF and visible in PDF viewers, search engines, and document management systems.
Optionally embed all fonts referenced in the PostScript file into the PDF. Embedded fonts guarantee that the PDF displays identically on every device, regardless of what fonts the viewer has installed.
Enable Fast Web View (linearisation) to optimise the PDF for progressive download — the first page loads and displays immediately while the rest of the file continues downloading in the background.
Set an open password to restrict who can view the PDF, and an owner password to control editing, printing, and copying permissions. Passwords are applied locally — they never leave your device.
View the raw PostScript source code of your uploaded files with syntax highlighting before conversion. Navigate between multiple files, see line counts, and verify the content before processing.
All processing happens in your browser using JavaScript. Your PostScript files never leave your device. No server receives your data. Works offline once loaded. Safe for confidential prepress and print files.
What PostScript is, why PS to PDF conversion matters, how it works technically, and how to get the best output for every use case
PostScript is a page description language created by Adobe Systems in 1982. It was one of the most transformative technologies in the history of publishing — it made it possible, for the first time, to describe a printed page in a device-independent way. Before PostScript, every printer manufacturer had its own proprietary command language, and documents created for one printer would not print correctly on another. PostScript changed all of that by defining a universal, mathematical description of a page that any PostScript-compatible output device could interpret and render at its own native resolution.
At its core, PostScript is a full programming language — a stack-based, interpreted language that describes not just what to print, but how to compute it. A PostScript file contains a sequence of commands that, when executed by a PostScript interpreter, produce a rendered page. These commands describe geometric shapes, text rendering, image placement, colour transformations, clipping regions, and many other visual elements with mathematical precision. The resolution-independence that results from this mathematical description means a PostScript file can be output to a 300 DPI laser printer or a 2400 DPI imagesetter with equal fidelity, each rendering at the full capability of the output device.
Despite being over four decades old, PostScript remains deeply embedded in professional publishing, commercial printing, and enterprise print workflows. Many high-end laser printers still use PostScript Level 3 as their native language. Design applications like Adobe InDesign and Illustrator can export PostScript directly. Mainframe and legacy enterprise systems frequently generate PostScript for document output. Scientific and academic publishing tools, including LaTeX and many other typesetting systems, produce PostScript as an intermediate format in their output pipeline. Understanding how to convert these PS files to the more universally accessible PDF format is an essential skill for anyone working in design, printing, or document management.
EPS (Encapsulated PostScript) is a subset of PostScript designed for embedding graphics and illustrations within larger documents rather than serving as a complete page description. A standard PS file typically describes one or more complete pages and is designed to be sent directly to a printer. An EPS file describes a single graphic or image, includes a bounding box comment that defines its dimensions, and is designed to be placed within another document. Both formats use the same PostScript language internally, which is why both can be converted to PDF using the same tools and techniques. The key difference is that EPS files are usually single-image assets, while PS files are typically complete multi-page documents.
Converting PostScript to PDF is fundamentally an interpretation process, not a format translation. A PostScript interpreter — the same kind of software inside a PostScript printer — executes the PostScript program and renders each page as a sequence of graphical operations. The PDF generator then captures those graphical operations and encodes them into PDF's own internal representation instead of sending them to a printer's imaging engine.
The industry-standard tool for this conversion is Ghostscript, an open-source PostScript and PDF interpreter developed by Artifex Software. Ghostscript has been in active development since 1988 and is the engine behind most PS-to-PDF conversion workflows, from command-line scripts to commercial software applications. The standard Ghostscript command for converting a PS file to PDF looks like this in a terminal:
gs -dBATCH -dNOPAUSE -sDEVICE=pdfwrite -sOutputFile=output.pdf input.ps
This command tells Ghostscript to run in batch mode (-dBATCH), suppress interactive prompts (-dNOPAUSE), use the pdfwrite device to generate PDF output (-sDEVICE=pdfwrite), write to a specified output file, and process the input PS file. Additional parameters control PDF version, compression, colour space, and dozens of other output characteristics.
Browser-based PS-to-PDF conversion uses the same underlying interpretation logic, implemented in JavaScript. The PostScript source is parsed and executed by a JavaScript PostScript interpreter, and the resulting graphical operations are encoded as a PDF data structure that is assembled in memory and provided to the user as a download — all without any server involvement.
Choosing the correct PDF version for your output depends on where the PDF will be used, what features you need, and what software will open it. The version determines which PDF features are available, but generally speaking, the differences between versions are meaningful only for specific professional use cases.
| PDF Version | Year | Key Features | Best For |
|---|---|---|---|
| PDF 1.4 | 2001 | Transparency, 128-bit RC4 encryption | Maximum compatibility, legacy systems |
| PDF 1.5 | 2003 | Object streams, cross-reference streams | General use, smaller files |
| PDF 1.6 | 2004 | AES encryption, 3D content support | Secure documents, interactive PDFs |
| PDF 1.7 | 2006 | ISO 32000-1, JavaScript, rich media | Enterprise documents, forms, ISO compliance |
| PDF 2.0 | 2017 | ISO 32000-2, enhanced colour, AES-256 | Future-proof archiving, modern workflows |
For the vast majority of everyday use cases — sharing documents by email, posting PDFs on websites, sending to a print shop — PDF 1.4 is the ideal choice. It is supported by every PDF reader ever made, including extremely old versions of Adobe Reader and every mobile PDF viewer. The transparency support introduced in PDF 1.4 is sufficient for most design work, and the 128-bit encryption is adequate for basic document protection. When in doubt, PDF 1.4 is the safest default.
PDF 1.7, published as ISO standard 32000-1, is the basis for most current professional PDF workflows including PDF/A (archiving), PDF/X (print exchange), and PDF/E (engineering). If you are working with a print service provider, submitting to a journal or publisher, or producing documents for long-term archival, PDF 1.7 or its archival subsets are the appropriate choice. PDF 2.0 (ISO 32000-2) is the current standard and adds support for enhanced colour spaces, AES-256 encryption, and improved handling of tagged PDF for accessibility, but adoption is still growing and some older workflows may not support it.
PostScript files from professional design applications often contain mixed colour spaces — some elements in RGB, others in CMYK, and possibly spot colours (Pantone references) as well. How these colour spaces are handled during PDF conversion significantly affects how the output looks both on screen and in print.
If the converted PDF will be sent to a commercial printer or RIP (Raster Image Processor), CMYK colour space is almost always the correct choice. RGB colours look vivid on screen but can produce unexpected results when converted to CMYK ink percentages during the printing process. Forcing CMYK during PS-to-PDF conversion ensures that all colours are defined in terms of cyan, magenta, yellow, and black ink percentages that the print device can use directly. For critical colour work, consult with your print service provider about their preferred ICC profile and colour management settings.
For PDFs that will be displayed on screen — website downloads, email attachments, digital reports — RGB is the appropriate colour space. RGB colours have a wider gamut than CMYK and render more accurately on displays. If the PostScript source was created in an RGB workflow (common for screen-focused design tools), preserving the original RGB colour space produces the most accurate screen rendering.
One of the most important aspects of PS-to-PDF conversion for professional use is font handling. PostScript files often reference fonts by name without embedding the actual font data — they rely on the rendering device (printer or interpreter) having the font available. When converting to PDF for distribution, this is a problem: if the font is not embedded in the PDF, viewers who do not have the font installed on their system will see a substitute font, which can dramatically change the document's appearance and layout. Enabling font embedding during conversion includes the complete font data in the PDF file, guaranteeing identical rendering on every device regardless of font installation. The trade-off is a slightly larger file size, which is almost always worth it for professional output.
Well-formed PostScript files contain Document Structuring Conventions (DSC) comments at the top — lines beginning with %% that describe the document's pages, bounding box, fonts used, and other structural information. Before converting, glance at the PS source preview to check for these headers. A file beginning with %!PS-Adobe-3.0 is a compliant DSC PostScript file and will convert cleanly. Files without DSC headers are valid PostScript but may require specific page size settings because the auto-detect feature relies on DSC BoundingBox comments.
The DPI setting controls how raster content inside the PostScript is sampled during conversion. PostScript vector content — paths, text, shapes — is always resolution-independent and will render perfectly at any DPI. The DPI setting matters primarily for raster images embedded in the PostScript. For web distribution, 72 or 150 DPI produces small files with adequate screen quality. For standard print, 300 DPI is the professional minimum. For large-format printing, engineering drawings, or fine art reproduction, 600 or 1200 DPI may be appropriate despite the larger file sizes they produce.
The Fast Web View (linearisation) option reorganises the PDF file structure so that the first page of the document is stored at the beginning of the file. When a user opens the PDF in a web browser or downloads it from a website, the first page becomes visible almost immediately while the rest of the document continues loading in the background. For multi-page documents distributed online, this is a significant user experience improvement. For single-page PDFs or print-only workflows, linearisation has no meaningful effect and can be safely left disabled.