STL Converter

Save yourself from the hassle of spending countless hours trying to figure out how to convert multiple STL file into other formats with our fast and easy STL file converter.

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STL Files
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STLConverter

How to Convert .stl Files in Bulk

1. Install reaConverter

Download reliable STL conversion software to convert multiple .stl files and folders in one go.
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Install reaConverter

2. Select STL Files

Select STLs from a folder or drag and drop them into reaConverter, then choose the desired output format.
reaConverter - Load STL files

3. Start Conversion

Click Convert to start the bulk conversion of all selected STL files. The process will begin right away.
reaConverter - Start STL conversion

Convert STL on your PC

For quick and effortless STL 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.

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Do more with your files

Converting STL 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.

Conversion features
Image editing

User Reviews

Average User Rating:
Last updated on September 01, 2025
"After 200+ conversions on my budget laptop (i3-1115G4/4GB RAM/Win11), reaConverter outperforms heavyweight tools. Zero crashes, low CPU usage during batch processing, and no internet dependency - exactly what professionals need."
Walter Morgan
Walter Morgan
Satisfied Customer
"reaConverter's automation tools have completely changed how I manage my projects. I often work with large batches of illustrations and used to spend hours converting and organizing them. Now, with Watch Folders, I just set the rules once and everything is handled automatically, exactly how I need it. This is pro-level automation made simple."
Chloe M.
Chloe M.
Freelance Illustrator
"5/5⭐ Finally! Does what it promises - converts AND tweaks images without complicated menus. Perfect for quick jobs."
J. Mitchell
J. Mitchell
Satisfied Customer
"This converter delivers exceptionally quick format conversions with reliable results every time."
Brian White
Brian White
Happy User
"An efficient all-in-one solution for image conversion and light editing, designed for maximum user-friendliness."
Elena Anderson
Elena Anderson
Happy User
"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!"
Mark T.
Mark T.
Satisfied Customer

STL files: Frequently Asked Questions

What are STL files?

he STL file format is a 3D file format used in computer-aided design (CAD) software. It represents a three-dimensional object as a series of interconnected triangles, each specified by the coordinates of its three vertices. The STL format is commonly used for 3D printing, rapid prototyping, and computer-aided manufacturing (CAM) applications. It is also used in various computer graphics applications, such as video games and virtual reality simulations.

Can reaConverter open STL files?

reaConverter fully supports the STL file format – open, edit, and export STL files to any other popular file format with ease.

How do I change STL to another format?

reaConverter is a user-friendly tool for converting STL files. Once installed on your computer, it allows you to convert all your .stl files at once with just a few clicks. You can even convert stl images directly from Windows Explorer using the right-click menu — fast and convenient.

Can I convert STL online?

If you only want to convert a few STL files, you are welcome to try our free online STL converter.

How can I turn STL files on my computer to another format?

The best way to convert STL 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 STL.

How can I automate STL 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 STL 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 stl converter.

What else can I do with reaConverter?

Convert CAD formatsSet picture bit depthConvert DICOM imagesChange picture sizeConvert PDF

What formats can I convert a STL file to?
ai  apng  avif  bmp  bpg  cal  cg4  cgm  cin  dcx  dds  dgn  dis  drw  dwf  dwg  dxf  emf  epi  eps  fax  fits  flif  gbr  gif  glb  gltf  hpg  hru  ico  iff  iges  igs  jp2  jpeg  jpg  jxl  jxr  mif  mtv  pcl  pct  pcx  pdf  pgm  pic  plt  png  ppm  prc  ps  psd  qoi  qrt  rad  rla  sgi  shp  step  stp  svg  svgz  tga  tif  tiff  webp  webpll  wmf  wmz  wpg  wrl  x3d  xbm  xpm 
What types of files can I convert to STL format?
3d  3ds  3mf  ac  ac3d  acc  amj  ase  ask  b3d  blend  bvh  cob  csm  dae  enff  fbx  glb  gltf  hmb  hmp  irr  irrmesh  lwo  lws  lxo  m3d  md2  md3  md5  mdl  mesh  mot  ms3d  ndo  nff  obj  off  ogex  pk3  ply  pmx  prj  q3d  q3o  q3s  sib  skp  smd  step  stp  ter  uc  vta  x3d  xgl  zae  zgl 

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Explore our efficient STL file converter that saves you time and effort by converting multiple .stl files into different formats.
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