JNX to FTS conversion is the process of transforming map or tiled image files in the JNX format (used for Garmin custom map overlays and tile archives) into FTS image files (a flexible tiled format used by certain GIS and mapping applications). This conversion re-encodes the tile structure, metadata, and image compression so the map tiles and zoom levels are preserved and become compatible with FTS-based viewers and tools.
Related guides
Practical guides to help you choose formats, preserve quality, and avoid common conversion problems.
Learn how to convert photos for social media the right way. This guide covers the best image format for Instagram, Facebook, LinkedIn, and X, common social media image sizes, handling HEIC from iPhone, sRGB color, aspect ratios, and how to resize photos for social so your uploads stay sharp.
Read guide →Choosing between image file formats affects quality, speed, compatibility, privacy, and long-term storage. This guide explains JPG vs PNG vs WebP, when newer formats like AVIF and HEIC make sense, and how to pick the best image format for photos, screenshots, logos, ecommerce images, print files, archives, transparency, animation, and everyday conversion workflows.
Read guide →Product photos are rarely ready for every marketplace the moment they leave a camera or design tool. Shopify, Etsy, Amazon, eBay, and WooCommerce each have different expectations for file type, dimensions, background, compression, and zoom quality. This guide explains how to convert product images cleanly, choose the right ecommerce formats, preserve detail, and prepare reliable batches for faster listings.
Read guide →Drag your .JNX file from your computer or use the browse function.
Confirm .fts as the selected destination format.
Click "Convert" and download your converted .FTS file once ready.
JNX files usually use the application/octet-stream MIME type and contain map or geospatial imagery data. FTS files often use the image/x-fits MIME type and are favored for scientific and astronomical image storage due to their ability to support metadata and high precision. Codecs used in FTS focus on lossless compression, whereas JNX may rely on proprietary encoding.
The FTS (.FTS) format is commonly used for image. Understanding its characteristics can be helpful when converting to or from other formats like JNX.
While specific technical details aren't available here, FTS files generally serve the purpose of storing image effectively within their domain.
Easily convert your JNX files to FTS format using our efficient online converter. Whether you need to update file compatibility or optimize for specific software, our tool provides a seamless JNX to FTS conversion process without the need for downloads or installations.
JNX files are typically used for specialized image formats with limited software support, while FTS is widely recognized for its flexibility and efficient compression. Converting JNX to FTS enables broader usability across different platforms and applications.
Keep individual JNX files under 200–500 MB for fastest single-file conversion; split very large archives into smaller tiles when possible.
To preserve map detail, choose a high or lossless FTS quality setting; avoid aggressive lossy compression if you need sharp labels and small features.
For batch conversions, process files in groups and monitor memory usage; converting many high-zoom tiles at once can exhaust RAM—stagger jobs or use a queue.
Note format-specific limitation: some JNX files may include proprietary metadata or nonstandard tile offsets that require pre-processing to correctly map into FTS.
The JNX to FTS converter saved me hours of manual work.
Emily R.
Photographer
Reliable and fast conversion with excellent output quality.
Mark D.
GIS Specialist
User-friendly tool that perfectly fits my workflow.
Anna L.
Graphic Designer
Start your free JNX to FTS conversion now.
Drag your file here to to upload.
Up to 250MB
If you rely on coordinate accuracy, verify georeferencing after conversion since coordinate metadata can be stored differently between JNX and FTS.