UmbraDownload 1.11.0

Free & open source  ·  Windows 10 & 11

Desktop widgets that live on your wallpaper.

Small, sharp, true-black widgets pinned under your apps. 26 of them one click away, sandboxed, scriptable, and yours to build.

Download Umbra 1.11.0See it in action

On your desktop

  1. 01

    Pinned to your wallpaper

    Widgets live on the desktop itself. Not in a sidebar, not in a gadget panel.

  2. 02

    Always under your apps

    Open anything. Widgets stay at the bottom of the stack and never steal focus while you type.

  3. 03

    Still there after Win+D

    Show the desktop and your widgets are right where you left them.

  4. 04

    Arrange it your way

    Edit mode: drag, snap, resize and zoom. Lock everything when you're done.

The catalog

26 widgets.
One click each.

Markets, weather, to-dos, habits, timers, calendars, media, games. Every one is reviewed in a pull request and installs from Settings → Browse.

Calendar glanceClaude wakerClockCountdownsCrypto priceQuote or word of the dayEvent RadarFreeCellExchange ratesGitHub ActivityHabitsHearthInternships
MinesweeperNow PlayingPomodoroPrayer TimesQuick NotesScript RunnerSolitaireS&P 500SpiderTo DoApplication TrackerTransit departuresWeather
Browse all 26 widgets →

Built for the desktop

Quiet. Sharp.
Completely yours.

#000

True black, truly sharp

Opaque windows with corners drawn by Windows keep full ClearType text. On OLED the black pixels are simply off, so each card floats on your wallpaper.

Edit mode with snapping

Drag, resize, zoom and nudge with the arrow keys. Guides snap to edges, centers and gaps.

Hotkeys & peek

Global shortcuts for edit mode, refresh, hide, and a peek that lifts widgets above your apps for a few seconds.

Private by design

No account, nothing phoned home. Your settings and data stay in %APPDATA%\Umbra.

Layouts & tab groups

Save named layouts per monitor setup and switch when you dock. Stack widgets in one spot with tab groups.

Copies side by side

Run any widget twice with its own options, position and data.

Notifications & media

With your permission, widgets send real Windows toasts or control what's playing.

Everything Umbra can do, in the docs →

Sandboxed

Every widget gets a locked room.

  • Only the hosts it declares. A widget reaches the HTTPS hosts listed in its widget.json. Every other request gets a 403 from the host app.
  • No silent upgrades. An update that asks for new hosts, notifications, media or commands waits until you accept it.
  • Commands, only with your OK. A widget can run a local program only if it declared that exact command, with no shell, and you approved it.
Read the security model →
api.open-meteo.com✓ declared in widget.jsonumbra.local✓ the widget SDKads.tracker.example✕ not declared403http://203.0.113.7✕ not HTTPS403Umbra hostWeather widgethosts:api.open-meteo.com

Themes

Repaint everything in one click.

Themes recolor every widget at once, live, from Settings → Appearance. They're plain data with no code, and publishing one is a single theme.json.

Build a theme →
Focus24:59
PauseSkip
My Day2 of 6
Review lecture notes
Gym
Water the plants
S&P 500Closed
7,744.06

Make it yours

A widget is a folder.
Or a sentence.

HTML, CSS and JavaScript in a folder with a widget.json. No build step, no framework. Write it by hand, or hand the job to an AI agent over MCP.

PowerShell
Claude Code
  • 26widgets already built this way
  • 0build tools or frameworks needed
  • 1pull request to publish yours
Build your first widgetRead the docsContributing guide

Give your desktop something to say.

Free, open source and a two-minute install. No account, no admin prompt.

Download Umbra 1.11.0Read the docs

Windows 10 (1809+) and Windows 11 · Portable zip and all releases