SYNU Converter

Convert SYNU files with automation. reaConverter supports Watch Folders, right-click conversion, and the command line.

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SYNU Files
Online

How to Convert .synu Files in Bulk

1. Install reaConverter

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

2. Select SYNU Files

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

3. Start Conversion

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

Convert SYNU on your PC

For quick and effortless SYNU 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 SYNU 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 June 01, 2026
"An excellent program! I use it regularly in my work - it supports nearly every file format imaginable. The interface is intuitive and runs flawlessly every time."
Roger Cook
Roger Cook
Happy User
"Your solution was buried deeper in search results than it should be. After struggling with unclear alternatives, I found your guides — finally, instructions that made sense for a first-time user like me. Excellent work!"
Richard E. Miller
Richard E. Miller
Satisfied Customer
"I'd been searching for reliable conversion software forever — reaConverter has everything I need! After installing and watching the tutorial, I had my files converted to the perfect format in minutes. Flawless experience!"
Sanjay Mehta
Sanjay Mehta
Satisfied Customer
"Converts files in seconds! Finally a tool that's both fast and simple to use."
Wei Chen
Wei Chen
Happy User
"I deal with hundreds of images daily, and reaConverter has been a lifesaver. The Watch Folders feature lets me automate file conversions without lifting a finger. I set up a folder for incoming files and it automatically resizes, renames, and converts them into the formats I need. It's like having a personal assistant!"
Sarah T.
Sarah T.
Graphic Designer
"Security was our top concern when evaluating file conversion tools. reaConverter’s offline mode and role-based access controls let us lock it down for sensitive environments. No unexpected network calls or bloat — just clean, fast conversions. Even passed our pen-testing scans without a hitch."
Marcus White
Marcus White
Healthcare IT

SYNU files: Frequently Asked Questions

What are SYNU files?

SYNU is a rare graphics format associated with an old image processor known as Synthetic Universe. An alternative extension used by this is program is SYN. Both formats are considered old and obsolete, so opening them using regular image viewers is probably difficult.

Can reaConverter open SYNU files?

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

How do I change SYNU to another format?

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

Can I convert SYNU online?

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

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

The best way to convert SYNU 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 SYNU.

How can I automate SYNU 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 SYNU 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 synu converter.

What else can I do with reaConverter?

Convert vector imagesConvert picture color spaceCopy IPTC dataConvert CAD formatsSet image bit depth

What formats can I convert a SYNU file to?
ai  apng  avif  bmp  bpg  cal  cg4  cgm  cin  cit  dcm  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  stl  stp  svg  svgz  tga  tif  tiff  u3d  webp  webpll  wmf  wmz  wpg  wrl  x3d  xbm  xpm 

Beyond SYNU conversion

Convert .synu files in batches of any size, with editing and processing applied along the way. The same tool also handles 700+ other formats, including CAD, medical imaging, and GIS.
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Free trial · Windows 10/11 · 64-bit · v8.0.240 · Files never leave your computer
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