TrailBlender

Merge and repair GPX & FIT

Only for Mac

Free

Mac

Turn separate recordings into one activity. Merge GPX and FIT tracks, remove GPS spikes, adjust timestamps, and export your edited route—all on your Mac. Bring your activity files together. TrailBlender helps you combine separate recordings, tidy up GPS tracks, and prepare an activity for export. Import GPX files and FIT activities with GPS data, inspect the route on a map, and review the available sensor channels. MERGE YOUR RECORDINGS Combine tracks from different recordings. Preview the result before creating your merged activity. EDIT AND REPAIR Trim, crop, or split a track. Detect and remove GPS spikes, edit activity metadata, and adjust timestamps. Undo and redo let you review your changes as you work. KEEP YOUR SENSOR DATA Retain supported heart-rate, cadence, power, elevation, speed, and temperature values at the points that remain in your edited track. EXPORT GPX OR FIT Save your edited activity as GPX or FIT. Convert between the supported formats using the Export menu. WORK ON YOUR MAC Activity files are processed locally, with no account required. Optional product analytics are off by default. Online terrain and street maps load tiles from external providers, which receive your IP address and the requested map area independently of analytics consent. Available in English, German, French, and Spanish. FORMAT DETAILS FIT import requires GPS records. FIT export requires valid, chronological timestamps on every point. Export creates new activity summaries; original FIT laps and custom developer fields are not preserved. Requires macOS 12 Monterey or newer with current Safari updates (Safari 16.4 or newer).

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The developer, Imanol Perez Iriarte, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Linked to You

    The following data may be collected and linked to your identity:

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Information

Seller
Imanol Perez Iriarte
Size
7 MB
Category
Sports
Compatibility
Requires macOS 12.0 or later.
  • Mac
    Requires macOS 12.0 or later.
Languages
English
Age Rating
4+
Copyright
© 2026 Imanol Perez Iriarte
  • Developer Website
  • Privacy Policy