HELP
Help & FAQ
From selecting an area to sharing it with your agent.
Does Flash Mask edit the image?
No. It turns selected areas into JSON coordinates for your agent and can export a black-and-white mask. Your chosen agent or image tool performs the edit.
How do I start?
Import an image, hold the mouse button to outline an area, and release to finish. Adjust the area or its points if needed, add optional instructions, then copy the JSON.
What should I send to my agent?
Provide the original image and JSON. If the conversation already contains the image, continue that conversation with the JSON and your instructions.
Which image formats are supported?
PNG, JPEG/JPG, and WebP. Masks are exported as PNGs at the original image size, with white selected areas and a black background.
Can I select multiple areas?
Yes. Draw another outline to add a region. JSON keeps each region, while the exported mask combines all selected areas.
Which browsers and systems are supported?
The web editor supports desktop Chrome and Safari. Other browsers may not work as expected. The Mac App requires macOS 26 or later on Apple Silicon; phones and tablets provide information, help, and purchase links only.
How do the web and Mac versions differ?
The web editor supports desktop Chrome and Safari. The Mac App supports Apple Silicon with macOS 26 or later, works offline, and has no ads or task limits. JSON from the web version does not include a local file path.
Can I edit on a phone?
Mobile pages provide information, help, and purchase links. Use a computer for the editor.
Are my images uploaded?
No. Images and editing content are processed locally and are not shared with advertising or analytics services. After copying or exporting, you decide whether to share them with another tool.
How do the web version's free credits work?
On your first day using this browser, you can process 3 images for free. From the next day, you get 1 per day; unused credits do not roll over. Days follow your device’s local date.
When does a task count?
A task counts only after an image opens successfully. Cancelling the file picker, choosing a non-image file, or a failed image load does not count. Successfully loading the same file again counts as a new image task.
Will my editing work remain when I run out of credits?
Yes. You can still import, outline, adjust nodes, and write a prompt. The limit appears only on the first attempt to copy JSON or export a mask. For an image covered by a free credit or a completed ad, you can copy JSON and export masks repeatedly until you load another image.
What happens if I finish, close, or cannot get the ad?
Finish one ad to copy JSON and export masks repeatedly for this image until you load another. Closing early leaves the image locked but keeps your edits. If an ad is unavailable or fails to play, your requested copy or export is free once: return to the editor and click the same button again. Later copies or exports may require another ad.
Still need help? Contact support →
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