How to reverse a GIF
To reverse a GIF, load it, keep Reverse selected and press Apply. The frames are played in the opposite order and each frame keeps its own timing.
How to make a boomerang GIF
Choose Boomerang. GifWrench appends the frames in reverse after the original ones, skipping the first and last frame on the way back so nothing stutters. The GIF becomes about twice as long and roughly twice as large, so you may want to compress it afterwards.
How to change how many times a GIF loops
GIFs store a loop count in the file. Choose:
- Loop forever: the usual setting for reactions and stickers.
- Play once: removes the loop instruction, so browsers stop on the last frame.
- Play 2, 3 or 5 times: sets a fixed repeat count.
Browsers and apps don't all honor loop counts the same way. Web browsers do; many messaging apps loop GIFs forever no matter what the file says.
Change the speed too
Reversed or boomerang GIFs often look better slightly faster. Use the GIF speed changer; it only rewrites the timing, so quality is untouched.