Convert STX to PDF

STX to PDF made easy. reaConverter processes documents locally with options for layout, quality, and file naming.

Manual STX to PDF conversion wastes hours. reaConverter automates the process — just add files and click Convert. Everything happens offline on your computer — no uploads, no cloud risks. Offices rely on it for archiving and document management.

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How to Convert Multiple STX Files to PDF?

1. Download and Install reaConverter

Download reaConverter and install it in seconds. The setup is straightforward — no complex configuration, no extra software required.

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Install reaConverter

2. Load your STX files

Open reaConverter and add your STX files. You can load individual files, entire folders, or even nested subfolders.

Drop your STX files into the window or use File menu to browse and select folders.

Load your STX files into reaConverter

3. Select PDF as output format

Choose PDF for output and set your save location. reaConverter lets you customize quality and apply edits before conversion.

Select PDF as output format

4. Start STX to PDF conversion

Hit Convert and let reaConverter do the work. The progress window shows status for each file in real time.

Start Conversion

After conversion, find your PDF files in the output folder. Click 'Show converted files' to open it directly.

STX to PDF Converter

reaConverter offers the fastest, simplest solution for converting your STX files into PDF in seconds - all files processed on your PC for maximum privacy and speed.

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Do more with your files

Converting STX files for use in a workflow? reaConverter offers many ways to process files, so you can customize them according to your requirements.

Our range of editing options includes auto-processing options such as auto-rotate, auto-crop, watermarking and more. Change Color Space, copy Metadata, set DPI, manage ICC Profile, control Bit Depth.

Conversion features
Image editing

User Reviews

Average User Rating:
Last updated on January 14, 2026
"Convert PDFs instantly via right-click context menu — no need to open extra apps!"
Jessica M.
Jessica M.
Satisfied Customer
"I’ve tried dozens of converters, but reaConverter stands out. The OCR feature for scanned PDFs works flawlessly, and the software never crashes."
Emily K.
Emily K.
Satisfied Customer
"This converter actually keeps your PDF->JPEG files crisp! No more quality loss or frustrating lag. Why did I waste time with other tools?!"
Peter Cox
Peter Cox
Satisfied Customer
"I've been searching for reliable software like this forever — finally found one that works smoothly without lag. After installing, I converted PDFs to JPEGs with perfect quality retention. Exactly what I needed!"
Richard Jones
Richard Jones
Digital Marketing Manager
"After testing numerous converters, this is the first solution that maintains 100% image quality during PDF to JPG conversion while operating seamlessly — no crashes or slowdowns even with batch processing."
Kenneth H.
Kenneth H.
Satisfied Customer
"PDF is certainly a universal format, but sometimes you need JPEG files instead. For conversion, I use reaConverter — a lightning-fast program. No online editor can match its speed. Install it once, and you're set. Just open, convert, and done!"
Nathan Ward
Nathan Ward
Satisfied Customer

STX to PDF Conversion: FAQ

What are STX files?

STX files represent RAW images created with SBIG CCD cameras. They are part of a group of formats known as Santa Barbara Instruments Astronomical Images, also including ST5, ST6, ST7 and ST8. Apart from astronomy, SBIG cameras can also be used in medical imaging, color photometry and a few other scientific and industrial sectors. All formats in the group are considered specialized and rare, so opening STX files might be possible only after conversion to more widely available extensions.

What are PDF files?

PDF (Portable Document Format) is one of the most popular formats used for storing document files which include both text and graphics. As opposed to other formats with a similar function, PDFs can be easily transferred between different applications and different operating systems, and generally don't have a very large size. Moreover, they can offer decent image quality in a compressed format and can be secured with passwords or watermarks.

Can reaConverter convert STX to PDF?

Yes! reaConverter instantly converts .stx to .pdf with perfect quality preservation. With its batch processing feature, you can convert multiple files at once in just a few clicks. You can even convert images directly from Windows Explorer using the right-click menu — fast and convenient.

Can I convert STX to PDF online?

If you only need to convert a few STX files to PDF format, feel free to try our free online free online STX to PDF converter — perfect for small batches with no installation needed!

How can I turn STX files into PDF on my computer?

The best way to change STXs to PDFs on your PC is to install a quality piece of software, such as reaConverter. This software is extremely efficient in managing a wide range of batch files conversions, including conversion from STX to PDF.

How can I automate STX to PDF files conversion?

reaConverter supports all the most useful automation features such as right-click сonversion and Watch Folders for the most efficient automated files conversion in any software of this type.

Is there a way to convert STX files to PDF using the command prompt?

reaConverter provides full access to all its features via Windows command line, including a high-performance command-line stx to pdf converter for batch processing.

What else can I do with reaConverter?

Convert RAW formatsConvert CAD formatsSet picture bit depthConvert DICOM imagesResize images

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