Extract text from ER diagram files (ERM)
To convert ERM diagrams to another format, you need ERMaster Eclipse Plugin or other Developer software.
To convert other file formats to the "Database Schema Diagram File" file type, you need software like ERMaster Eclipse Plugin or a similar tool.
The .erm file extension is most commonly associated with Entity-Relationship Diagram files created by the ERMaster plugin for the Eclipse IDE. These files store database schema designs, table definitions, and structural relationships in an underlying XML format. Another frequent use for .erm files is as plain text modification scripts for the classic game Heroes of Might and Magic III, specifically within the Wake of Gods (WoG) or ERA community engines. Additionally, .erm files can function as digital workspace archives for OpenText eRoom using standard ZIP compression, or store data dictionary user rights in Embarcadero ER/Studio.
The primary disadvantage of .erm files is their severe lack of interoperability and extreme fragmentation. Because multiple unrelated software platforms use the exact same extension for completely different data types, opening an .erm file without knowing its origin often leads to immediate errors. ERMaster files require the specific Eclipse plugin, which is a heavy IDE to install just to view a database diagram. The Heroes 3 scripts are completely useless outside of the game's engine, and OpenText eRoom archives are locked to enterprise ecosystems.
When dealing with .erm files, the best conversion targets depend entirely on the internal data. ERMaster diagrams are best converted to standard XML for raw data extraction, or exported as SQL DDL scripts to create real databases. If the file is an OpenText eRoom archive, it can simply be renamed to ZIP and extracted.
Because the .erm extension is heavily fragmented across multiple niches, it is notoriously difficult to process with automated tools. Standard online converters fail because they cannot guess which of the four formats the file actually is. Often, only the original software can properly read or export the specific data payload. Our analysis detects if your .erm file is underlying XML text, a plain text script, or a ZIP archive, allowing you to bypass the extension confusion and safely inspect the raw content or extract embedded assets.
Convert.Guru analyzes your ERM file, detects the exact format, and lets you read the text inside.
Users also converted XML, RBXM, E3D and DRN files.
If you want to convert ERM file to CSV, JSON, XML, YAML, YML, TOML, INI, CFG, CONF, DAT, DB or SQL, you can use ERMaster Eclipse Plugin or similar software from the "Entity-Relationship Diagram Storage" category. In the File menu, look for Save As… or Export….
To convert DBF, XML, SQLITE, XLSX, SQL, TSV, ACCDB, YAML, MDB, CSV, ODS or JSON files to ERM, try ERMaster Eclipse Plugin or another comparable tool in the "Entity-Relationship Diagram Storage" category.
The history of Convert.Guru began over 25 years ago in California with Tom Simondi’s file-format database. A former contributor to Space Shuttle development and a software pioneer of the 1980s, Simondi established a trusted resource for file type analysis that was even referenced by Microsoft Windows XP. Today, we use modern technology to process and convert thousands of file formats while continually improving our ERM converter.