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STS Converter
STS converter that handles any volume. From a few files to thousands, the results stay consistent.
How to Convert .sts Files in Bulk
1. Install reaConverter
2. Select STS Files
3. Start Conversion
Step by step
See It in Action
For quick and effortless STS file handling on your PC, reaConverter offers powerful conversion tools with batch processing. Best of all, it works entirely offline — ensuring your sensitive data never leaves your computer.
Extra Tools
Do more with your files
Converting STS files for use in a larger project? 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.
User reviews
From those who tried it
Average User Rating:Last updated on July 30, 2026
Questions & Answers
STS files: Frequently Asked Questions
What are STS files?
The STS file format is used to represent the bottom solder mask of a PCB design in two-dimensional vector form. This file type is typically created and processed using Eagle software and is part of the Gerber family of extensions, which are widely used in the PCB industry. Gerber files provide information about different aspects of electronic boards, such as copper layers, electrical connections, solder masks, and drilling or milling data. Other formats that are similar to STS include SOL, STC, and PLC.
Can reaConverter open STS files?
reaConverter fully supports the STS file format – open, edit, and export STS files to any other popular file format with ease.
How do I change STS to another format?
reaConverter is a user-friendly tool for converting STS files. Once installed on your computer, it allows you to convert all your .sts files at once with just a few clicks. You can even convert STS files directly from Windows Explorer using the right-click menu — fast and convenient.
Can I convert STS online?
If you only want to convert a few STS files, you are welcome to try our free online STS converter.
How can I turn STS files on my computer to another format?
The best way to convert STS files on your PC is to get 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 STS.
How can I automate STS files conversion?
reaConverter supports all the essential automation features, such as right-click сonversion and Watch Folders, for the most efficient automated file conversion in any software of its kind.
Can I convert STS files using scripts or the command-line interface?
reaConverter provides full access to all its features from the Windows command-line shell, including the command-line sts converter.
What else can I do with reaConverter?
Convert CAD formatsSet file dateConvert PDFWatermark imageConvert raster to vector
What formats can I convert a STS file to?
Discover More
Beyond STS conversion
Convert .sts files in batches of any size, with editing and processing applied along the way. The same tool also handles 800+ other formats, including CAD, medical imaging, and GIS.
