JNX to VIFF Converter

Transform JNX data into VIFF — fast and online

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Secure Processing

Your JNX uploads are deleted right after conversion, and the resulting VIFF output is removed from servers within 24 hours for full privacy.

Any Device Works

Run the JNX to VIFF converter from any device — desktop, laptop, tablet, or phone. All you need is a web browser to get started.

Format Flexibility

JNX to VIFF conversion opens new possibilities. Use your GPS map images in contexts where VIFF is the expected or required format.

How to convert JNX to VIFF

1

Select files from Computer, Google Drive, Dropbox, URL or by dragging it on the page.

2

Choose viff or any other format you need as a result (more than 200 formats supported)

3

Let the file convert and you can download your viff file right afterwards

About formats

JNX is a proprietary raster map image format developed by Garmin for their BirdsEye Satellite Imagery and BirdsEye Select services, introduced in 2010. JNX files store georeferenced satellite or aerial photography tiles organized in a multi-resolution pyramid structure that allows Garmin GPS devices to display terrain imagery at multiple zoom levels. Each JNX file contains a header with geographic bounding box coordinates, projection information, and a tile index, followed by the compressed image tiles themselves (typically JPEG-encoded). The format supports multiple detail levels within a single file, enabling smooth zoom transitions from overview scales down to detailed close-ups on the device's screen. JNX was designed specifically for outdoor recreation — hiking, hunting, fishing, and off-road navigation — where raster satellite imagery overlaid on vector topographic data provides situational awareness that vector maps alone cannot offer. One advantage is seamless integration with Garmin's handheld GPS units: JNX files load directly onto devices like the GPSMAP, Montana, and Oregon series, displaying satellite imagery as a base layer beneath waypoints, tracks, and routes without requiring cellular data or internet connectivity — essential in backcountry environments. The compact tile-based architecture is another practical strength: by pre-rendering and compressing tiles at specific zoom levels, JNX files deliver fast panning and zooming performance on the limited processors found in handheld GPS hardware, while keeping file sizes practical for the device's internal storage.
Developer: Garmin
Initial release: 2010
VIFF (Visualization Image File Format) is a scientific image format developed by Khoral Research (originally at the University of New Mexico), first appearing around 1990 with the Khoros visual programming environment for image processing and data visualization. VIFF files use a 1024-byte header followed by optional color map data, and the image data itself, with the header containing detailed specifications: data storage type (bit, byte, short, integer, float, double, complex), data encoding (none, CCITT Group 3/4), color space model (none, generic, RGB, HSI, CMYK, and others), and support for multi-band (multi-channel) images with arbitrary numbers of bands. The format accommodates one-dimensional signals, two-dimensional images, three-dimensional volumes, and location data (sparse pixel coordinates), making it versatile beyond simple image storage. VIFF was designed for the Khoros/VisiQuest visual dataflow programming environment, where users constructed image processing pipelines by connecting processing nodes in a graphical canvas — an approach that influenced later systems like AVS, MATLAB Simulink, and LabVIEW. One advantage is scientific data fidelity: VIFF supports the full range of numeric types used in scientific computing (including complex numbers and double-precision floats), stores multi-band datasets natively, and carries calibration metadata — making it suitable for remote sensing, medical imaging, and spectral analysis applications where generic image formats lose information. The format's connection to the Khoros visual programming paradigm provides another notable dimension — VIFF was the standard I/O format for one of the most influential early visual programming environments for scientific image analysis. VIFF files can be read by ImageMagick and legacy Khoros/VisiQuest installations.
Developer: Khoral Research
Initial release: 1990

Frequently Asked Questions

Why convert JNX to VIFF?

Most people lack software for JNX. Converting to VIFF ensures your GPS map images are viewable everywhere — from phones to desktops.

What programs open VIFF?

Open VIFF with standard tools like Windows Photos, Preview on macOS, GIMP, Photoshop, or any web browser — no special software needed.

Will my image lose quality?

Quality depends on the target format. VIFF scientific output preserves data within its format constraints — no unnecessary degradation occurs.

Can I convert on a phone or tablet?

Absolutely — the online converter works in mobile browsers just as well as on desktop. No app installation is required at all.

Do I need JNX software installed?

No — the converter processes JNX entirely in the cloud. You do not need any GPS navigation and outdoor mapping software on your device to convert.

How long does the conversion take?

Most JNX to VIFF conversions finish within seconds. Larger or more complex images may take slightly longer depending on the data size.