Convert STX to PPM

STX to PPM converter that respects your privacy. No cloud uploads, no file size limits — just fast offline batch processing.

Online converters too slow for your STX files? reaConverter works locally and handles unlimited batches. All processing runs locally on your PC, so your files stay private and secure.

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STX to PPM
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How to Convert Multiple STX Files to PPM?

1. Download and Install reaConverter

reaConverter installs quickly on any Windows PC. No dependencies, no bloatware — just a clean setup that's ready to use immediately.

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Install reaConverter

2. Load your STX files

Add STX files to reaConverter. One file or a thousand, the process is the same. Everything runs locally on your machine.

You can drag-and-drop files, browse to a folder, or add entire directory trees including subfolders.

Load your STX files into reaConverter

3. Select PPM as output format

Select PPM from the output format list and set your destination folder. You can also adjust quality and compression settings.

Select PPM as output format

4. Start STX to PPM conversion

Click the Convert button to start. reaConverter will process all your files with the settings you selected.

Start Conversion

When finished, your new .ppm files will be waiting in the destination folder.

STX to PPM Converter

reaConverter offers the fastest, simplest solution for converting your STX files into PPM 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 25, 2026
"This software just works! My old laptop can’t handle Photoshop, but reaConverter flies through conversions without breaking a sweat. Wi-Fi gone? Still strong!"
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"Rare software that actually does it all! Converts anything, beautiful interface, and never lets me down. A must-have!"
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"For cross-platform compatibility, JPEG remains the gold standard. reaConverter’s precision conversions ensure perfect results every time, whether for presentations, websites, or client deliverables."
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"We deployed reaConverter across our department to standardize file formats for our archives. The command-line support and automation features integrated perfectly into our systems. Stellar performance and zero crashes—it just works."
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"So simple! I just needed to convert a couple of files to another format, and for such a straightforward task, the online converter worked perfectly — delivering the files I needed in no time. Excellent service!"
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"I run a small design agency, and reaConverter has saved me countless hours. The batch processing is lightning-fast, and the ability to convert hundreds of files into different formats at once is a game-changer. Highly recommend!"
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STX to PPM 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 PPM files?

PPM or Portable Pixelmap files are image files included in Netpbm, an open source graphics program. The other widely used Netpbm formats are PGM (Portable Graymap) and PBM (Portable Bitmap). All three are image formats and are sometimes called collectively PNMs (Portable Anymap format). While PGMs contains grayscale images, PPMs include color images and they represent intermediary files used in the conversion of less known formats using the Portable Bitmap Utilities. PPM files are mostly operated on UNIX and Intel-based platforms.

Can reaConverter convert STX to PPM?

Yes! reaConverter instantly converts .stx to .ppm 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 PPM online?

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

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

The best way to change STXs to PPMs 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 PPM.

How can I automate STX to PPM 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 PPM using the command prompt?

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

What else can I do with reaConverter?

Change format settingsChange DPIConvert RAW photosConvert GIS filesConvert Gerber files

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