WLED Preset Editor

A standalone browser-based editor for WLED presets.json files. No installation, no server.

What it does

Load a presets.json exported from your WLED device, edit it visually, and export it back.

The editor lets you:

• Browse all presets in a sidebar and open them one at a time
• Edit every field defined in the WLED JSON API: name, brightness, transition, on/off state, and all segment parameters (effect, speed, intensity, palette, colors, LED range, grouping, CCT, custom sliders, flags)
• Select multiple presets using the checkboxes and apply bulk changes to all of them at once — useful for normalizing brightness, swapping effects across a whole set of presets, or adjusting LED ranges after rewiring
• See a diff of what changed before confirming any save or bulk operation
• View and copy the raw JSON of any preset

How to get the preset.json file

Go to your WLED device web interface, click Config > Security > Backup/Restore and click "Download presets".

You can then upload the modified file to your device via the same interface.

Usage

1. Open https://spongeball.github.io/WLED-utils in your browser
2. Click "Open Editor"
3. Load your presets.json via the button or by dragging it onto the page
4. Edit presets individually or select multiple with the checkboxes for bulk editing
5. Export the result with "Export JSON" and upload it back to your WLED device

The file never leaves your browser — everything runs locally.

Links

• WLED project: https://github.com/Aircoookie/WLED
• WLED knowledge base: https://kno.wled.ge
• Effects reference: https://kno.wled.ge/features/effects/
• Presets documentation: https://kno.wled.ge/features/presets/
• JSON API reference: https://kno.wled.ge/interfaces/json-api/
• WLED-Utils (effect previews and tooling): https://github.com/scottrbailey/WLED-Utils