GIF Circle & Rounded Mask
Mask every frame with an ellipse or rounded rectangle. A square source makes a circle; rectangular sources make an ellipse. Corners become transparent and dimensions stay unchanged.
Your files
Files stay on your deviceDrop files herePick a file to start
GIF · up to 20 MiB per file
Limits & supported formats
Input: 1 file · GIF · up to 20 MiB.
Images: up to 2,048 px per side and 400 animation frames.
Output: up to 2,048 px per side, 4,194,304 pixels per frame and 400 frames.
Detailed budgets: 40,000,000 decoded pixels, an estimated 192 MiB working allocation and 64 MiB per ZIP. These estimates help reject large jobs; they do not guarantee a browser process memory peak.
Add a file to get started.
Three steps. One moving picture.
01Choose the supported source files
02Adjust parameters and inspect the source
03Process, review the result and download
GIF Circle & Rounded Mask
Mask every frame with an ellipse or rounded rectangle. A square source makes a circle; rectangular sources make an ellipse. Corners become transparent and dimensions stay unchanged.
Choosing your settings
Review dimensions, timing and transparency before download. GIF re-encoding can change palette colors and normalizes extremely short source delays.
If the result needs another pass
If the combined canvas or timeline exceeds the budget, resize or trim the inputs first. Changing parameters clears the previous output.
GIF timing note: missing, 0 ms and 10 ms frame delays are read as 100 ms. Other supported delays are retained unless the task changes timing or the frame sequence. Re-encoded animation may therefore differ from a viewer that handles unusually short delays differently.
Good to know
How does this tool handle the animation?
Mask every frame with an ellipse or rounded rectangle. A square source makes a circle; rectangular sources make an ellipse. Corners become transparent and dimensions stay unchanged.
What can change during export?
Review dimensions, timing and transparency before download. GIF re-encoding can change palette colors and normalizes extremely short source delays.