About the site
A clearer view of imperfect location data.
Timeline Visualizer is a private browser-based tool for turning an exported Google Maps Timeline JSON file into a map you can inspect, replay, correct, and save.
Publisher and author
Timeline Visualizer is the public name used to publish and maintain this tool, its guides, policies, and update notes. Pages on this site that name Timeline Visualizer as the author are referring to this website publishing identity, not to an invented personal profile.
Questions about the tool or its documentation can be sent to support@timelinevisualizer.online.
What the tool is for
The visualizer helps people review a Timeline export without first uploading that file to an application server. It draws colour-coded transport routes, calculates summary statistics, supports date filtering, replays movement, allows local transport-label corrections, and can create PNG, WebM, MP4, or correction-file downloads.
Location-history exports can contain missing samples, inaccurate coordinates, inferred activities, and unexpected route shapes. The visualizer makes those records easier to inspect; it does not make the underlying observations exact.
Maintenance principles
Local first
The selected Timeline JSON is parsed in the current browser tab rather than posted to a file-processing server.
Visible uncertainty
Recorded routes, inferred gaps, display smoothing, and user corrections are presented as different things.
Reversible review
Display options and route corrections do not overwrite the source file selected by the user.
Clear boundaries
The site documents when base-map and consented analytics requests occur and what local exports may reveal.
What Timeline Visualizer does not claim
- It is not affiliated with or endorsed by Google Maps.
- It does not sync route corrections back to a Google account.
- It does not prove identity, attendance, exact speed, intent, or an exact path.
- It does not replace professional, legal, safety, or evidentiary review.