Coordinate Format Converter: methods and data limits

Convert geographic coordinates and Web Mercator records.

Use the guide alongside the working tool.

Explicit working sample

latitude,longitude
12.9716,77.5946
1.3521,103.8198
35.6762,139.6503

Convert geographic coordinates and Web Mercator records. Supported CRS are WGS84 latitude/longitude and Web Mercator EPSG:3857 only. DMS sign and hemisphere must agree; minutes/seconds must be below 60. Web Mercator latitude limit is ±85.05112878. No datum transformations. Decimal output retains 8 places; DMS uses 3 decimal seconds.

Prepare the input

Convert geographic coordinates and Web Mercator records.

CSV, TSV and arrays of scalar JSON objects are supported. Identifiers stay text. Empty cells are missing by default; add special missing tokens only if their meaning is certain. Use the sample to inspect the exact workflow.

Review the method

Supported CRS are WGS84 latitude/longitude and Web Mercator EPSG:3857 only. DMS sign and hemisphere must agree; minutes/seconds must be below 60. Web Mercator latitude limit is ±85.05112878. No datum transformations. Decimal output retains 8 places; DMS uses 3 decimal seconds.

Keep the useful output

Review the summary and result records. Transformation tools retain separate change, rejected-record or diagnostics datasets where relevant. Choose the dataset before exporting; a report and a cleaned dataset serve different purposes.

CSV exports protect formula-like text. JSON keeps data portable without making an Excel workbook. Reports and editable backups may contain private source values; download only what you intend to share. No automatic account storage or server processing is used.

Ready to apply this workflow?

Try Coordinate Format Converter →

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Keep your original files and review the result. Found unclear instructions? Contact Team Hypomnema.