Generate a stroke around the visible alpha shape for stickers, logos, icons, and thumbnails without leaving the browser.
Nearby tools from the catalog that fit the same job or workflow.
Add canvas safe area
Add transparent or solid safe area around one PNG without scaling the subject inside it.
Add shadow to cutouts
Add a soft or drop shadow behind one transparent cutout and export PNG locally.
Remove edge halos
Reduce halo edges and old sticker-style borders around the alpha shape in one PNG export.
Build animated PNG loops
Turn multiple PNG frames into one animated PNG in the browser with timing, loop, and framing controls.
Extract APNG frames
Extract every frame from one animated PNG and download a selected PNG or the whole frame set as ZIP.
Shrink animated PNG files
Rebuild animated PNG files in the browser to reduce weight, merge duplicate frames, and cap frame rate.
Save the tool to keep it easy to reopen from your account and favorites filter.
Sign in
Sign in to add this tool to your favorites.
Everyone can see the current score. Signed-in users can leave a 1 to 5 star rating, and any written review goes only to review@cleanor.app.
No ratings yet. Be the first to leave one.
Sign in to leave a public score from 1 to 5 stars. Optional written feedback is private and emailed only to review@cleanor.app.
This block mirrors the system review flow: score first, then an optional private note.
A quick way to understand who this helps, what it solves, and where it connects next.
People preparing stickers, logo badges, thumbnails, marketplace cutouts, and icon-like PNG assets that need separation from the background
Adding a visible edge around transparent artwork without moving into a bigger editor or repainting the asset by hand
Capture add-outline-to-PNG intent with a direct browser-first utility tied to transparent asset workflows
Another You and Cleanor
These sections explain the job in plain language and set expectations for what the tool should do well.
Transparent PNGs often need more contrast when they sit on noisy or changing backgrounds. A clean outline is one of the fastest ways to make icons, stickers, and product cutouts read clearly.
Short answers for the questions people usually have before trying a utility like this.
Yes. The tool adds an outline around the alpha shape and preserves the visible artwork inside the export.
It keeps the outline closer to the visible edge instead of pushing it fully outward, which can help on softer alpha shapes.
No. The outline generation happens locally in the browser.
Browser tools stay credit-based across the ladder: guests get a small daily balance, signed-in users start with monthly browser and AI pools, and paid tiers expand both balances as usage grows.
Checking access.
Balance details will appear as soon as the session finishes loading.
Resolving the account ladder and current credit window for this browser.