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Convert ELS (VCF-XML) to GTM Siren

Automatically convert your ELS vehicle configuration files (VCF-XML) into GTM Siren format. No account needed — just upload, convert, and download.

How it works

ELS (Emergency Lighting System) uses VCF-XML files to define vehicle light stages, patterns, and color schemes. GTM Siren uses a different JSON-based format. This converter bridges the gap — it reads your existing ELS config and maps everything to the GTM Siren structure automatically.

1. Upload

Select your ELS VCF-XML file. The converter parses all stages, patterns, color values, and light assignments from the XML structure.

2. Convert

The tool translates every ELS parameter into its GTM Siren equivalent: light stages map to siren stages, pattern sequences are preserved, and colors are carried over as-is.

3. Download

Your converted config is downloaded as a ready-to-use JSON file. Drop it into your GTM Siren resource and restart — no manual editing needed.

What gets converted

Light stages (STAGE1–STAGE4)

Each ELS emergency stage is mapped to the corresponding GTM Siren stage.

Pattern sequences & timings

Flash patterns, rotation speeds, and sync settings are preserved.

Color definitions

RGB and hex color values for each light are carried over directly.

Light grouping & assignments

ELS light groups (primary, secondary, traffic advisor) map to GTM Siren groups.

Vehicle metadata

Vehicle name, model hints, and other metadata are included in the output.

After conversion

Place the downloaded JSON file in your GTM Siren vehicle configs directory, then restart the resource. Fine-tune hotkeys and per-vehicle settings in the GTM Siren configuration. You can also use the Siren Config Editor to tweak the output visually.