Nothing is floating in here yet. Add your first idea to start filling the box.

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PaNebula, a space for your ideas

Every idea is a card floating in 3D. Boxes hold them, and the biggest boxes, the kings, are little worlds of their own. No idea sits above another: what gives your vault its shape is how ideas connect.

  • Catch thoughts. N for an idea, B for a box. R starts a Flow: type thought after thought, and Enter lets each one go.
  • Connect them. L threads two ideas together. T shows the threads.
  • Let them meet. S gathers a random handful into a Spark. When something clicks, capture it.
  • Catch from anywhere. Q opens the Pocket: a little Nebu on top of your other apps.
  • Find your way. Home shows everything, [ ] go from box to box, Ctrl+F finds.
  • Keep company. Nebu floats around your ideas, notices what belongs together, and now and then asks you about them.
  • It's yours. No account, no server: your vault stays on this computer. Save it as a .nebu file, your whole vault in one file, pictures included, to move, back up or share.

Pick a topic on the left for its shortcuts, or take the Tutorial (at the top) for a tour with Nebu.

Some cards are simplified

To keep PaNebula smooth, only the nearest cards are drawn in full detail. The farther ones appear as plain cards with their colored edge but no text or pictures. Nothing is lost: every idea is still there, unchanged.

To see them: move closer (they fill in as you approach), or raise the limit in Other options › Graphics › Cards in full detail. "Automatic" adjusts the limit to how fast your computer is; a number or "All" fixes it.

Tip: PaNebula is much faster with your browser's graphics acceleration turned on (Chrome: Settings › System; Edge: Settings › System and performance), which lets it show more cards in full.

Connect ideas

In the order you picked them. The first one is .

Turn on automatic backups?

PaNebula can keep a copy of your vault every 30 minutes while you work, holding the last 10, quietly in this browser. If something ever goes wrong, you can open an earlier version from Load \u203a Backups. You can change this, or keep backups in a folder on your computer instead, any time in Other options \u203a Backups.

Sparks

Nebu

A small companion that drifts through your vault. It visits ideas, notices things (a question you never came back to, two ideas that seem related) and now and then asks you about them. When a few ideas keep coming back to the same thing, it shows them side by side on a small screen beside itself, and can bring them together into a sub-box if you like. It reads your ideas only here, on this computer. Click it, drag it around, or let it rest.

In the vault
Talks
Camera follows it you can still turn and zoom; Esc stops
Pocket a small window that stays on top of your other apps: catch ideas from anywhere (Q)
Pen pressure and the eraser end work with a drawing tablet · 1 2 3 sizes · E eraser · Ctrl+Enter done

New vault

A new, empty space with one king box. Your settings stay as they are.

Keep the current look background and card colors
Choose where to save it now otherwise it stays in this browser until you press Ctrl+S

Unsaved changes

◯ Flows

A Flow (R) is for letting ideas pour out without stopping to sort them. Each Flow gathers its ideas around a small ring: a cluster that belongs to no box and drifts from king to king, lingering a few minutes in each. Edit its ideas like any other, or turn the cluster into a sub-box once it has found its place.

✦ Sparks

A Spark (S) gathers a random handful of ideas in front of you. When they give you a thought, Capture spark saves it: it is threaded to the ideas it came from and floats between them.

Threads

New idea

You can also drop files here, or paste an image.

New sub-box

Color
Opacity

Save

Delete boxes

Move ideas

Import / Export

Drop files, folders or ZIP files anywhere on PaNebula, or here.
Review before importing group files into ideas and leave some out
Use the text of .txt and .md files as the idea instead of attaching the file
A picture pasted from a web page becomes a link otherwise it is embedded
Text to separate ideas
Split into ideas by
Remove bullets, numbers and # marks

Headings and bullets never create boxes; every piece becomes an idea.

ZIP files

Review import

Arrange as
Click files to select them. You can also drag them between ideas.
Make a box for each folder otherwise everything goes into one box
Use the text of .txt and .md files as the idea only for files that are alone in their idea
Skip this review from now on you can turn it back on in Import / Export

Merge kings

Tidy the kings

You are in an isolated view

Open in browser tab

Other options

Hiding boxes
The eye button hides
Auto-save
Save automatically to the slot or file you last saved to with Ctrl+S
Save this long after a change
Tabs
Open vaults from Load, Recent and Backups
Keep videos and music playing when you switch to another tab still one at a time: starting another pauses the first
Storage
…