How to use Screenshot Annotation Tool
- Upload a supported screenshot.
- Add annotations and adjust their order, coordinates or text.
- Review the preview and download a new annotated image.
Example: Screenshot Annotation Tool
A local worked example using the inputs and settings below for screenshot annotation tool.
You add
Screenshot or image: ["sample.png (348 bytes)"]
Maximum output side (px): "1200"
Ordered annotation layers (JSON): "[\n {\n \"type\": \"box\",\n \"x\": 10,\n \"y\": 10,\n \"width\": 35,\n \"height\": 25,\n \"color\": \"#dc2626\",\n \"size\": 4,\n \"text\": \"\"\n }\n]"
You get
Rendered 1 ordered annotation layers to a 80 by 60 PNG.
annotated-screenshot.png (80 × 60 pixels)
annotation-layers.json
Options
- Layer order
- Annotations are rendered in their listed order. Moving or removing a layer changes the flattened PNG.
- Coordinates and size
- Positions use percentage coordinates while the documented sizes use output pixels. Check the chosen output scale before placing fine labels.
Supported inputs and limits
JPEG, PNG or WebP, 64 MiB and 24 megapixels. Up to 50 ordered arrow, box, text or blur layers; percentage coordinates and output-pixel sizes. Output is bounded to 2 megapixels. The PNG is flattened. Blur is a visual effect and does not securely remove private information.
Where your input is processed
This tool processes your input in this browser. Your text and files are not uploaded to UseFreeTools. Check this tool's limits for anything it may save on your device.
Blur does not safely redact private data
Blur leaves information that may remain recognizable or recoverable. Use a suitable opaque redaction workflow for material that must be removed, then verify its output. The annotation PNG is a visual presentation copy without editable layers.
Questions about Screenshot Annotation Tool
Can I correct an annotation?
Yes. Select its layer, edit the supported values or remove it before export.
Does blur securely remove sensitive information?
No. Blur is a visual annotation and must not be treated as secure redaction.
Are annotations saved back into the original screenshot?
No. Export creates a new image; keep inputs separately if you need to revise them later.