OpenAnyFile
What is a .tcx file?
Training Center XML is a map and GPS format developed by Garmin, first released in 2007. It is usually created by Garmin Connect, fitness platforms.
Like GPX but adds laps, heart rate and cadence per point. The track is drawn with its distance and duration.
File details
| Full name | Training Center XML |
|---|---|
| Category | Maps & GPS |
| MIME type | application/vnd.garmin.tcx+xml |
| Signature (magic bytes) | 3C 3F 78 6D 6C (<?xml) |
| Developer | Garmin |
| Introduced | 2007 |
| Opens with | Map track viewer |
| Uploaded? | No — read locally in your browser |
How to open a .tcx file
OpenAnyFile routes .tcx files to its map track viewer, which shows the route drawn with distance and elevation.
- Drop your .tcx file on the box above, click it to choose the file, or paste it with Ctrl+V.
- The real format is detected from the file's first bytes — not just its name.
- The file opens in the map track viewer.
- Use fullscreen for a closer look, check its checksums, or download it back unchanged.
What works — and what does not
Works
Viewing and inspecting: the route drawn with distance and elevation. Size, type, signature and checksums are always shown.
Does not work
Editing and saving back. OpenAnyFile is a viewer, not an editor — for changes you still need the original app.
Is it safe to open a .tcx file online?
Here, yes — because nothing is uploaded. Most "online viewers" send your file to their server. OpenAnyFile reads it with your browser's File API and decodes it on your own device, so there is no copy anywhere else. You can check: open your browser's network tab while opening a file — no upload appears.
Questions about .tcx files
Can I open a .tcx file without installing software?
Yes. OpenAnyFile opens .tcx files in your browser using its map track viewer. You get the route drawn with distance and elevation, with nothing installed and no account.
How do I know a file is really a .tcx file?
Check its first bytes instead of its name. A genuine TCX file begins with 3C 3F 78 6D 6C (<?xml). OpenAnyFile shows the detected type, so a renamed file is easy to spot.
Is my .tcx file uploaded anywhere?
No. The file is read locally by your browser and never sent to a server — it even works offline once the page has loaded.
Does it work on phones?
Yes — on Android and iPhone, in any modern browser. You can also install OpenAnyFile as an app.
Related formats
Other formats from the same family:
Format facts checked and page updated on September 25, 2026.