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Want sfx fast? sfxp can help! Adjust the sliders for new sounds, or click "random" for instant inspiration.

Cart #sfxp-1 | 2023-09-21 | Code ▽ | Embed ▽ | No License


  • click/drag sliders and buttons
  • right click the random button to mutate the current sound instead of fully randomizing it
  • z/x to replay the current sound
  • left arrow to undo
  • right arrow to redo

You can export either to sfxp format (to share, or to edit more later) or to PICO-8 sfx format (to paste into the PICO-8 sfx editor and use in your PICO-8 games). Export works via the clipboard, which can be kind of weird on the web version of PICO-8. I highly recommend running sfxp on desktop PICO-8 if you have it.

You can also find sfxp on Itch.

Made for the PICO-1K Jam.

Update 2023-09-20: undo bug fixed and redo added.

P#134424 2023-09-16 08:24 ( Edited 2023-09-21 02:13)


What a great (+amazing) tool entry! 👏😯
The fact you got this in 1K also? Stonking.
Insta-bookmarked for future use!! 😉👍

P#134431 2023-09-16 12:33

Wow! Just clicking random a few times gave me lots of interesting, high quality SFX. Will definitely be using this.

P#134446 2023-09-16 14:43

This is very fun! Just spent, like, half an hour grabbing random SFX, chucking them into PICO-8, and building a little track.

P#134449 2023-09-16 17:17

@packbat, wow, such great sounds! That second instrument sounded like a harmonica to me. This could be a really useful tool for generating the missing instruments for midilib.

P#134453 2023-09-16 18:29

A button to replay the current sound would be helpful.

P#134454 2023-09-16 18:33

@Liquidream - thanks for running the 1k jam! I don't think I'd have thought to make this otherwise.

@packbat - I love the surprisingly organic sound set you picked out for that.

@bikibird glad you're finding it useful! I think z/x (or whatever your two action buttons are) should replay the sound?

P#134458 2023-09-16 22:30

I got so excited by the cart that I forgot to read the post. Yes, z/x works.

P#134463 2023-09-16 22:49

I love this. And I just hit random a lot of times for my Halloween game. Thank you for this helpful tool!

P#134503 2023-09-17 19:31


P#134515 2023-09-18 05:43

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