Can I use Flash CS3 to open Flash CS4 files?

NO.

It’s a question that people have been asking me for a few weeks now.
I don’t see how this is not normal. I mean you couldn’t open Flash MX 2004 files with Flash MX either… It was normal back then, and it hasn’t changed now.

You can however save Flash CS4 files as Flash CS3 files (you lose everything in the file which is CS4-only) and then open it in Flash CS3.

Ronny

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Ronny is a freelance frontend developer with a wild passion for creativity and a relentless hate against flat design. Ronny spent years as a Flash developer before moving to HTML5 and rediscovering fun and happiness.

24 Comments Join the Conversation →


  1. thomas

    thanks for clearing that up! :d haha

    Reply
  2. jeff

    can i open flash cs4 to flash cs3?

    Reply
  3. Avi

    lolz, i guess that answered my question.

    Reply
  4. Hugh

    Actually, I have Flash CS4 and need to share a file with someone with Flash CS3. I used the Save As option to save the file as a CS3 file. He still can’t open it. I had this same problem when I would work with Flash CS3 at school and save the files as Flash 8 files. When I tried to open them at home with Flash 8 they wouldn’t open. What gives? Am I missing a step? Do you have to do something beyond Save As > Flash CS3?

    Reply
  5. Ronny

    Hmz, that’s kinda weird… Windows or Mac? I’ll give it a try to see what happens. (On a Mac it works just fine actually)

    Reply
  6. Hugh

    On a Mac. The file was originally a CS3 file. I made some minor changes to it, saved it as a CS4 file without thinking. Changed it back to a CS3 file. Now my client can’t open it.

    Reply
  7. ujk

    nice answer

    Reply
  8. Hugh

    Any ideas?

    Reply
  9. JohnnyW

    Having similar problems myself… Very frustrating!

    Reply
  10. Somenzi

    hohohohohohoho

    BIG NOOOOOOOOOOOO!
    very cool!

    My files of the tuto lynda as3, also don’t open in cs3!!!

    Como pode a grande Adobe, querida Adobe fazer uma incompatibilidade tão idiota de versão para versão. Isso é muito estranho.!!!
    Flwwwww

    Reply
  11. flash designer

    The only way to avoid all this, is not to upgrade your Flash version. In many cases Flash 8, or Flash CS3 does a great job so why bother with Flash CS4, soon we will see another upgrade.

    Reply
  12. Jason

    @ Flash designer

    You bought a computer but why? They’ll only get loads better in a couple years time.

    Reply
  13. Jayna

    Oh Brother! That’s a BIG NO. it breaks my heart real bad.. im expecting YES! uwwaaaa….

    Reply
  14. Graham

    Having the same issue with Flash CS4 > Save as CS3, and when trying to open it in CS3 (on a different machine at work) I get “Unexpected file format.” Anybody find any solutions yet?

    Reply
  15. Lisa

    I was hoping for some kind of work-around too. My professor keeps sending me files in CS4, and I can’t open them! I had to borrow money to buy CS3 less than a year ago when it was required for classes!

    Reply
  16. Francisco Venda

    Boas. Gostava de saber se é possível abrir ficheiro criados em Flash Mx no Flash CS3. Obrigado

    Reply
  17. jerry

    bitch

    Reply
  18. Ronny

    Lol 🙂

    Reply
  19. Dam That Shit

    DAMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMm, SHITTTTTTTTTTTTtT, Buttttt hhole, MUTHAFUKA, Im screwed there goes my client and $400,000 because of that crap, bloody adobe, SHIT

    Reply
  20. JaneSchmane

    If you’re saving down from CS4, and it still won’t open in CS3, double check the flash player settings. Sometimes this gets toggled back up to Flash player 10 when saving back and forth (atleast on a mac.. I haven’t noticed this problem on my pc yet)

    Reply
  21. Austin Maguire

    I’m trying to open a CS3 Flash file on my PC that was made and saved on a Mac but it won’t open. I get warnings such as ‘Invalid file format’ etc, have you any ideas what I can do to open it on my PC?

    Reply
  22. Rob Riggs

    Adobe released a fix to CS3 files crashing/performing sluggishly in May 2009…

    http://www.adobe.com/support/flash/downloads.html

    I downloaded this update, and now my CS3 files open a-ok.

    Reply
  23. Parvez

    NOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO

    Reply
  24. KEVALONE

    WHEN I CREATE SIMPLE MOVING FLASH CS4 FILES HOW DO I SAVE THEM TO USE ON MYSPACE OR ON THE WEB? THEY ALWAYS SIT STILL LIKE JPEG FILES WHEN THEY OPEN! I SAVED AS SWF,FLA,ETC. I’M LOST HELP!! I WANNA GET SOME CLIENTS AND THIS STEP WOULD SET ME OFF ARTISTICALLY & FINANCIALLY. I WOULD BE ABLE TO MAKE A DONATION LATER YOU HAVE MY WORD.

    Reply

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