What is EPSG.io
EPSG.io is an open-source web service with a database of geographic coordinate systems used in maps worldwide. Any contribution from the online community is very welcome. The service is supported by MapTiler. So, if you notice any issue with functionality, open a helpdesk ticket or write a message to the public GitHub repository, or send a pull request with a fix: EPSG.io.
Batch transformation via API
If you need to use the full power of EPSG.io and integrate transformation into your workflow, use the Coordinates API. It is powered by EPSG.io and provides all its features from a scalable infrastructure with an SLA.