Download installer

Latest version 0.6.2 (05/07/2019)

Application installer (Windows 2000, XP, Vista, 7, 8, 10)

See the history of changes (changelog).

Download installerRIOT as plug-in for other applications

RIOT plugin for The GIMP, IrfanView, XnView and other supporting applications

You like Radical Image Optimization Tool ?

Then you can donate a little money if you use this program at work
or if you simply want to express your gratitude.

Portable version

The program is portable. This means you can download RIOT as ZIP archive, extract and use. No install required.


The latest standalone version can be downloaded also from these mirrors:

Plug-ins for RIOT

Even if RIOT is available as plug-in for other programs like IrfanView or GIMP,  RIOT itself can be extended with plug-ins to enhance it’s functionality.

Currently only input plug-ins are supported. In the future I hope more plug-in types will be added.

Download the RAW + HDR plugin package – allows you to open HDR, OpenEXR and RAW camera images

Special notice to IrfanView users
IrfanView has bundled into the plugin collection the Lite version of the RIOT plugin.

Here you can find the extended version (also FREE)  that goes beyond Lite version offering extended functionality.

I always recommend the extended version over the Lite one.

Read the difference between Lite and Extended


RIOT Softonic Rating

Freeware genius pick

RIOT antivirus report at

Soft82 award 5/5

Best Software 4 Download

Best Vista Download 5 star award

Reviews & articles

32 comments on “Download
  1. ali taufik says:

    Thanks for RIOT i like it software !

  2. VicenteUp says:

    Excelente programa. Es el mejor, el más intuitivo, más fácil de usar y que mejores resultados brinda. Muchas gracias por tu gran programa!

  3. name says:


  4. RIOT ROCKS! I cannot believe how fast it is to compress images. So much better than the competitors. Well done!!!

  5. That is probably the best and simplest image optimizer.
    I hope it’s not dead – no updates since 2013?

  6. Kensai says:

    I just download and give a try. How can i say, RIOT is exactly what i’m looking for. It’s really awesome. Thank you. 🙂

  7. Gracias amigos, este programa creo que me servira de mucho para comprimir png para mi sitio.

  8. Tomorrow says:

    Looks like the plugin download is a little broken. Both the standalone and plugin downloads attept to download the same standalone version @

    Plugin downloader correct link is:

  9. Armando says:

    About The program RIOT I need it for MAC ¿Do you have it?

    Sorry for mi English I know is very Bad


  10. Mehdi says:

    The Best and very lightweight.

  11. toma says:

    i wanted to suggest, if you can make an option for RIOT, to be shown it in right click menu for images. (similar as “right click image converter” OR “Light Resizer” has).

    this option should be changed from RIOT preferences.

  12. Thom says:

    Much quicker & easier to use than opening Photoshop CS.

  13. the best programm for immage

  14. Harald says:

    Wonderful software. Can you please include some more saving of the settings, i.e. width and hight of the resizer module? This would make it even more comfortable. Thanks!

  15. Lonnie says:

    Love the Riot software. It works better than most compressors with better results. This should be everyone’s go to tool for compression.

  16. faritorero says:

    Hello, is there anything as powerfull for Mac? Thanks

  17. Jimmy says:

    For god sake please add the “crop” feature!

  18. Ghaith says:

    great application

  19. DD says:

    Tested on PNG file, it gave me same result as fireworks. Good Job!!!

  20. Carlos says:

    Perdonen mi ignorancia, pero no sé como gravar la imagen optimizada cuando le doy “Save as” Gravar grava la imagen sin optimizar.
    en que estoy fallando?

    Pardon my ignorance, but do not know how taxing the optimized image when I give “Save as” Taxing as gravel .. me unoptimized image.
    where am I failing?

  21. Larry says:

    I had been looking for an easy program to batch resize some images and this program worked perfectly. Thank you and keep at it.

  22. this is great soft ware for me i will download it from you admin thanks

  23. Saul says:

    64-bit version please, I have asked Irfanview to get their 64-bit version too.

  24. admin says:

    @Ger: the RAW + HDR plugin package is for RIOT not for IrfanView

  25. Ger says:

    The RAW + HDR plugin package allows you to open HDR, OpenEXR and RAW camera images. I suppose you mean open in IrfanView. But IrfanView version 4.33 can open RAW and RW2 files wthout the RAW and HDR plugin package. Can you explain? I have copied these three fip files to the IrfanView and also to the IrfanView\Plugins folder.

    Installed Plugins in IrfanView shows no difference, neither does the IrfanView user interface.

    Your link detailing about the Lite and Extended version gives an error 404 Page not found.

    In other words, can you pls tell us how to ge these fip files working and how to verify that IrfanView with these fip files actually offers extended functionality.


  26. Alce says:

    This works great on XView. Thank you

  27. admin says:

    Not yet, but probably in the future

  28. Bangon Kali says:

    Is there a 64 bit version of this program? It would be great to have a dedicated 64bit version of this. Thank you for this great program!

  29. admin says:

    Currently there is only read support for JPEG 2000.
    Write support will not be added until this format will be widely supported on web browsers.

  30. Saul says:

    Any JPEG2000 support in the future?

  31. admin says:

    Hello Harry
    Thank you for your support. If you are using the RIOT IrfanView plugin you can copy all the 3 .fip files in the main IrfanView folder or in the plugins folder.

  32. Harry Ward says:

    I use Irfanview, and just updated RIOT to 0.4.6. Thanks for making the extended version of a fabulous program. It installed in Irfanview just fine.

    I also downloaded the plug-in file. You said: “Even if RIOT is available as plug-in for other programs like IrfanView or GIMP, RIOT itself can be extended with plug-ins to enhance it’s functionality.

    Download the RAW + HDR plugin package – allows you to open HDR, OpenEXR and RAW camera images.”

    However, I can’t figure out how to get RIOT to recognize the plug in. I extracted the .zip file, and got 3 .fip files, but I don’t know what to do with them, and I can’t find anything in RIOT to tell me.

    Thanks in advance for your assistance,