KML Merger Online
Drop multiple Google Earth KML files, pick your conflict strategy, and generate a polished merged file in seconds. Everything executes offline inside your browser for maximum privacy and speed.
Matches duplicates using normalized coordinates and names, then keeps the cleanest version.
Strips blank description tags so your merged file downloads faster and uploads smoothly.
Choose how identical placemark titles are handled across overlapping KML files.
Merge summary
- Files ready
- 0
- Total placemarks
- 0
- Removed duplicates
- 0
- Styles preserved
- 0
Duplicate insights
- No duplicates detected yet. Merge files to analyze overlaps.
Activity log
- Ready when you are. Add your first KML file to begin.
| # | Placemark name | Coordinates | Source file |
|---|---|---|---|
| No placemarks yet. Merge to populate this preview. | |||
About This KML Merger
Our KML Merger Online tool was engineered for GIS analysts, field survey teams, and hobbyist mappers who need an ultra-fast way to consolidate Google Earth layers. Competitor tools often require sign-ups, upload your data to remote servers, or choke on larger files. This experience runs entirely in-browser, making it private by design while delivering instant feedback as you tweak settings.
Under the hood, the merger preserves folder hierarchy, styles, and metadata while intelligently resolving conflicts. Smart deduplication compares both coordinates and placemark names so overlapping datasets are cleaned without manual work. Lightweight architecture, compressed styles, and deferred UI elements keep the Core Web Vitals in the green, ensuring rock-solid performance even on spotty field connections.
To help you stay audit-ready, the tool automatically logs every action and captures a resumable session that stores locally. Whether you are reconciling survey updates, blending trail maps, or merging client revisions, you can close the browser mid-task and resume later without repeating steps. That combination of speed, data stewardship, and resilience makes this merger a trustworthy upgrade over traditional workflows.
How to Use
- Load your source data by dragging KML files into the drop zone or tapping the upload field on mobile.
- Choose how duplicates should be handled, whether to trim empty descriptions, and pick the naming strategy that fits your project.
- Hit the Merge button to generate a cleaned document. The live dashboard highlights totals, deduplicated placemarks, and preserved styles.
- Download the combined KML, export the placemark summary to CSV, or copy the shareable state to send to teammates.
Tips
- Toggle Auto number duplicates when you rely on identical naming conventions but still want every placemark preserved.
- Use the CSV summary inside spreadsheets to validate attribute coverage before sharing the merged layer.
- Restore Last Session to recover work after offline interruptions or accidental browser closes.
- For huge datasets, merge in batches and keep the dedupe toggle on to minimize final file size.
FAQs
Does this KML merger run offline?
Yes. All processing is client-side so you can merge layers without sending files to a server. Once the page loads, you can disconnect and continue working securely.
How are duplicate placemarks detected?
The tool compares normalized coordinates and placemark names. When matched, it keeps the cleanest entry, logs what was removed, and can optionally renumber or append source filenames.
Can I share the merged result with collaborators?
Use the Copy Shareable State button to generate a secure link that recreates your session. Teammates can paste the link into their browser to load the same merge settings and summary instantly.
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