Outline Transparent Image
Draw a colored outline around the alpha silhouette, 1–20 px. A fully opaque rectangle produces a rectangular outline.
Your files
Files stay on your deviceDrop files herePick a file to start
PNG, JPEG, WebP (static) · up to 20 MiB per file
Limits & supported formats
ZIP or folder: up to 8 supported images, 40 MiB expanded total. Nested archives and unsupported entries are rejected.
Input: up to 8 files · PNG, JPEG, WebP (static) · 20 MiB each, 40 MiB combined.
Static images: up to 2,048 px per side. Animated inputs are not supported here.
Still image output: up to 2,048 px per side and 4,194,304 pixels. No animation is exported.
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.
Files are processed one at a time with shared settings. A failed file does not stop the others.
Add a file to get started.
Three steps. One moving picture.
01Choose an image
02Set the effect and output format
03Check the result, then download
Outline Transparent Image
Draw a colored outline around the alpha silhouette, 1–20 px. A fully opaque rectangle produces a rectangular outline.
Choosing your settings
Use PNG to retain alpha. Input/output are bounded to 2048 px per edge; canvas expansion must also fit.
If the result needs another pass
If detail is lost or edges look harsh, lower the amount and process the original again. JPEG flattens transparency and introduces compression loss.
Good to know
What does this operation change?
Draw a colored outline around the alpha silhouette, 1–20 px. A fully opaque rectangle produces a rectangular outline.
How do I keep transparency?
Use PNG to retain alpha. Input/output are bounded to 2048 px per edge; canvas expansion must also fit.