ADM to GPX Converter Online

About This ADM to GPX Converter

Built after reviewing feedback threads on notable GPS forums, Reddit threads, and niche mapping communities, this converter streamlines how surveyors and outdoor navigators repurpose legacy Magellan MapSend ADM files. Many competitor tools struggle with heavy JavaScript payloads, lack CSV export, or fail to explain parsing issues. This version stays under 40 KB of core code, runs entirely client-side for privacy, and offers immediate validation so your converted GPX meets modern app requirements. Whether you are migrating historic trail logs or tidying old marine charts, the goal is the same: sharper accuracy with fewer clicks.

How to Use

Start by dragging a .adm file into the drop area or pasting coordinates into the editor. Choose whether you want a GPX track or waypoint file, tweak the smoothing tolerance if your source includes noise, and decide how timestamps should be generated. Click “Convert to GPX” to parse the dataset, inspect the XML that appears on the right, and then download, copy, or share via permalink. The permalink bundles your GPX and option selections into a secure hash so teammates can replicate the exact output instantly.

Tips for Cleaner GPX Files

For best results, export your ADM from MapSend or OziExplorer in ASCII form and keep the original coordinate columns intact. Enable elevation detection if the source includes Z values—those will be woven into the GPX automatically. Use the smoothing slider to dampen jitter from low-resolution logs, and watch the distance metric to confirm the path still matches your expectations. When merging multiple sources, paste the additional coordinates beneath the original data; the converter will deduplicate overlapping points and report the final count.