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Chart Annotation Layer Maker

Add callouts, ranges and notes to an uploaded chart without altering underlying claims.

Worked exampleBrowser processingUseful downloads

A clear result starts here

Add your input or try the worked example.

Using Chart Annotation Layer Maker

Add callouts, ranges and notes to an uploaded chart without altering underlying claims.

Choose the supported local file or use Try example to see a complete worked result.
Set annotation color. Read the field notes for supported values.
Choose Create annotated chart and inspect the result, including any review flags or unsupported cases.
Use the relevant download buttons to keep your result. CSV and report JSON preserve the available findings; original files are not changed.

Example

Annotations CSV / JSON: x,y,label,width,height
30,45,Review this change,0,0
65,25,Selected region,20,30
Annotation color: #7c37a8

Questions & answers

What does Chart Annotation Layer Maker do?

Add callouts, ranges and notes to an uploaded chart without altering underlying claims.

What input does this tool support?

Annotations CSV / JSON: Columns: x,y,label,width,height. Coordinates and optional region size are percentages.. Annotation color File formats: image/png,image/jpeg,image/webp.

What should I check before using the result?

Adds user-authored annotations to a raster copy. It does not infer values, verify a claim or edit the chart’s underlying data.

Can I keep or share the result?

Yes. Use the result-specific downloads, CSV where available and report JSON. Downloads can contain your supplied information, so review the content before sharing. Processing runs in this browser; public pages also include the site’s approved advertising and optional analytics.