Drop several GPX files (or FIT, TCX, KML/KMZ, GeoJSON…) and merge them into a single GPX track. Sort the parts automatically by their timestamps or arrange them by hand with the ↑/↓ buttons, then download one file. Keep them as separate segments (no line drawn across the gaps) or join everything into one continuous segment. Everything runs in your browser — nothing is uploaded.
FAQ
Are my files uploaded?
No — GPX files are merged entirely in your browser. Other formats (FIT, TCX…) are only converted to GPX server-side and never stored.
In what order are they joined?
By timestamp when “Sort by time” is on, otherwise in the order of the list — reorder with the ↑/↓ buttons.