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GMT Converter

Stop converting GMT files one by one. reaConverter processes entire folders in one run, with the same settings applied throughout.

GMTConverter
4.8

Over 25 years of experience

Your files never leave your PC

Read what our users say

How to Convert .gmt Files in Bulk

1. Install reaConverter

Download reliable GMT conversion software to convert multiple .gmt files and folders in one go.

2. Select GMT Files

Select GMTs from a folder or drag and drop them into reaConverter, then choose the desired output format.
reaConverter - Load GMT files

3. Start Conversion

Click Convert to start the bulk conversion of all selected GMT files. The process will begin right away.
reaConverter - Start GMT conversion

Step by step

See It in Action

For quick and effortless GMT file handling on your PC, reaConverter offers powerful conversion tools with batch processing. Best of all, it works entirely offline — ensuring your sensitive data never leaves your computer.

Extra Tools

Do more with your files

Converting GMT files for use in a larger project? reaConverter offers many ways to process files, so you can customize them according to your requirements.

Our range of editing options includes auto-processing options such as auto-rotate, auto-crop, watermarking and more. Change Color Space, copy Metadata, set DPI, manage ICC Profile, control Bit Depth.

Image editing

User reviews

From those who tried it

Average User Rating:
Last updated on June 30, 2026
For agencies handling confidential data, reaConverter eliminates cloud-upload risks while delivering unmatched conversion reliability. Our team uses it both in-office and remotely with identical results.
Jamal Bailey
Jamal Bailey
Satisfied Customer
My photography business relies on fast, accurate processing of images. With reaConverter’s Watch Folder, I drop my RAW photos into a folder and they’re instantly converted to high-res JPEGs with custom naming and watermarking. It’s streamlined my post-processing more than I imagined possible.
Emily R.
Emily R.
Photographer
So simple! I just needed to convert a couple of files to another format, and for such a straightforward task, the online converter worked perfectly — delivering the files I needed in no time. Excellent service!
Kenneth D. Carter
Kenneth D. Carter
Satisfied Customer
An excellent program! I use it regularly in my work - it supports nearly every file format imaginable. The interface is intuitive and runs flawlessly every time.
Roger Cook
Roger Cook
Happy User
Before reaConverter, I was the ‘File Conversion Guy’ at work — a title I never asked for and definitely didn’t want. Then I found the Watch Folders feature, and suddenly I was free! Now, files convert themselves while I sip coffee and pretend I'm still working hard. My coworkers think I'm a wizard. Thanks reaConverter, for saving my sanity and boosting my fake productivity!
Ben H.
Ben H.
Overwhelmed Office Hero
Our volunteer team uses reaConverter to prepare images for fundraising campaigns. The learning curve was minimal, and the results are professional-grade. The customer support team even helped us customize a workflow — fantastic service!
Jason P. Bailey
Jason P. Bailey
Non-Profit Coordinator

Questions & Answers

GMT files: Frequently Asked Questions

Can reaConverter open GMT files?

reaConverter fully supports the GMT file format – open, edit, and export GMT files to any other popular file format with ease.

How do I change GMT to another format?

reaConverter is a user-friendly tool for converting GMT files. Once installed on your computer, it allows you to convert all your .gmt files at once with just a few clicks. You can even convert gmt images directly from Windows Explorer using the right-click menu — fast and convenient.

Can I convert GMT online?

If you only want to convert a few GMT files, you are welcome to try our free online GMT converter.

How can I turn GMT files on my computer to another format?

The best way to convert GMT files on your PC is to get a quality piece of software, such as reaConverter. This software is extremely efficient in managing a wide range of batch files conversions, including conversion from GMT.

How can I automate GMT files conversion?

reaConverter supports all the essential automation features, such as right-click сonversion and Watch Folders, for the most efficient automated file conversion in any software of its kind.

Can I convert GMT files using scripts or the command-line interface?

reaConverter provides full access to all its features from the Windows command-line shell, including the command-line gmt converter.

What else can I do with reaConverter?

Convert vector filesChange image DPIChange format settingsCopy IPTC dataConvert Gerber files

What formats can I convert a GMT file to?

Discover More

Beyond GMT conversion

Convert .gmt files in batches of any size, with editing and processing applied along the way. The same tool also handles 700+ other formats, including CAD, medical imaging, and GIS.

Free trial · Windows 10/11 · v8.0.245 · Files never leave your computer

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