GEOO.APP

GMT to MIF/MID

Convert GMT to MIF/MID online for free — right in your browser. No upload, no sign-up, batch conversion, coordinate systems and attributes preserved.

Features

Fast Conversion

Efficiently convert from GMT to MIF format

Data Security

All processing is done locally in your browser

Standard Format

Output standard MIF format

gmt to mif

Convert gmt to mif online for free — right in your browser. No upload, no sign-up, batch conversion, coordinate systems and attributes preserved.

Drag and drop files or folders, or click to upload

Related Tools

MIF → GMTGMT → GEOJSONGEOJSON → GMTMIF → GEOJSONGEOJSON → MIF

About

GMT

GMT ASCII Vectors is a text-based vector data format used by Generic Mapping Tools (GMT) software. GMT is widely used in earth science research and academic paper map making. The GMT format records geographic features as text lines, each containing coordinates and optional attribute information.

MIF/MID

MapInfo MIF (MapInfo Interchange Format) is MapInfo's data exchange format. MIF files store geometric graphics data, and MID files store corresponding attribute data. Unlike TAB format, MIF/MID is a plain text format more suitable for cross-platform data exchange. Many GIS software use MIF/MID as a bridge for interacting with MapInfo data.

Conversion trade-offs

GMT: limitations to know

  • Only used in GMT software ecosystem, low universality
  • Does not support complex attributes and style information

MIF/MID: what you gain

  • Better suited for data exchange compared to TAB format

Why convert GMT to MIF/MID?

Converting GMT to MIF/MID is one of the most common workflows in GIS. GMT data usually comes from desktop GIS software, government open-data portals, or data exchange with partners, while MIF/MID is what modern tools, web maps, and platforms expect. This converter bridges the two: it reads your GMT files, keeps geometry and attributes intact, and writes clean MIF/MID output — entirely in your browser, so your data never leaves your device.

Frequently asked questions

Are my files uploaded to a server?

No. The conversion runs entirely in your browser using WebAssembly — your files never leave your device.

Is the GMT to MIF/MID converter free?

Yes, completely free with no sign-up and no usage limits.

Are coordinate systems preserved when converting GMT to MIF/MID?

By default the output keeps the source coordinate system. If your GMT file uses a projected CRS (like UTM), you can search any EPSG coordinate system by keyword or code and reproject in one step. Note: output formats that require WGS84 by specification (KML, KMZ, GPX) always reproject to WGS84 automatically.

Can I convert multiple files at once?

Yes — drop several GMT files at once and each one produces its own MIF/MID output.

MIF/MID at a glance

Key Features

  • Plain text format, easy for cross-platform exchange
  • MIF stores geometry, MID stores attributes, clear structure

Common Use Cases

  • Exchanging MapInfo data with other GIS systems
  • Exporting MapInfo data for use in open-source GIS

How to Use

  1. 1

    Upload your GMT file — drag and drop it onto the page, or browse from your device. You can add several files at once for batch conversion.

  2. 2

    The conversion runs automatically in your browser. No upload, no server — your data stays on your device the entire time.

  3. 3

    Download the MIF/MID file. Each input produces its own output, ready to use in your GIS, web map, or archive.