Convert KAP to HEIC
Convert KAP to HEIC online: the whole nautical chart raster decoded edge to edge, saved as a HEIC image. Free, no sign-up.
Drop your KAP files here
Up to 50MB per file.
Conversion Settings
Files are encrypted and auto-deleted after conversion
How to Convert
- 101
Upload your KAP files
Drag and drop or select KAP files from your device. You can upload multiple files at once.
- 202
Configure Output
Choose any available HEIC output options, then start the conversion.
- 303
Download HEIC files
Once conversion finishes, download your files individually or as a compressed ZIP archive.
Why convert KAP to HEIC?
KAP is the BSB raster nautical chart format used by hydrographic offices and marine navigation software, holding a scanned chart image with its geographic calibration. The complete chart raster stored in the file is decoded by GDAL at its stored resolution, with its colour palette applied so the chart keeps its original colours.
HEIC uses High Efficiency Image Coding, the format iPhones and iPads save photos in, so the image is compact while staying sharp.
Frequently Asked Questions
How do I convert KAP to HEIC?
Drop your KAP file above and press Convert. Our servers read the chart with GDAL's BSB driver, expand its colour palette into a lossless PNG, then encode it in the format you chose. The result is saved as a HEIC image, ready to download.
Which part of a KAP chart appears in the HEIC?
The complete chart raster stored in the file, from edge to edge, at the resolution it was scanned at.
What reads the BSB data in a KAP file for the HEIC?
GDAL's BSB driver, part of the open-source geospatial library used widely in mapping software. It reads the chart raster and its colour table, and the full-colour chart becomes the HEIC.
How big is the HEIC image from a KAP file?
The chart is rendered at its full native resolution, keeping every pixel of the scanned chart.
How compact is the HEIC made from a KAP file?
HEIC uses High Efficiency Image Coding, which typically needs about half the space of a JPG of similar quality, so even detailed pages stay small.
Is my .kap file kept private?
Your file is uploaded over an encrypted connection, converted on our servers and deleted automatically within 24 hours. We never read, share or keep your files, and no account is needed.