Free Coordinate Format Converter that works offline
Switch between map-friendly decimal coordinates and traditional degrees-minutes-seconds notation without sending locations anywhere.
What this coordinate format converter does
DMS divides one degree into sixty minutes and each minute into sixty seconds. Hemisphere letters determine the sign of the decimal result.
How to use the Coordinate Format Converter
- Enter or paste latitude and longitude in decimal or DMS format into the tool.
- Adjust the available options so they match the format and result you need.
- Choose Convert coordinates and review validated decimal degrees and formatted DMS values before using it.
- Copy or download the result, then clear the page if the input was sensitive.
Common uses
- Preparing map coordinates
- Reading GPS and survey notation
- Converting viewpoint locations
- Checking hemisphere signs
Private processing and offline access
This tool does not submit your input to a conversion server. Processing takes place inside the browser using local JavaScript and standard Web APIs. After the PWA has been installed or cached, the page and its core features remain available without an internet connection. Closing or clearing the page removes unsaved input; the tool does not create an account or cloud history.
Tips for accurate results
- Latitude uses north or south; longitude uses east or west.
- Do not include a negative degree and a south or west hemisphere together.
- Coordinate conversion does not change the datum or projection.
Frequently asked questions
Does this tool upload my data?
No. Coordinate Format Converter processes its input in the current browser and does not submit it to a conversion API.
What input does the Coordinate Format Converter accept?
Latitude from -90 to 90 and longitude from -180 to 180 are supported. DMS input uses separate degree, minute, second and hemisphere controls.
Can I use this tool offline?
Yes. Once the Offline Tools PWA has cached the page, the core feature works without an internet connection.