Online Whiteboard

A practical board for one person

This whiteboard is deliberately local and single-user. It is useful for a quick diagram, a lesson outline, a rough interface, a retrospective or a set of thoughts you want to arrange visually. It does not create meeting rooms, shared cursors, public links, accounts or cloud backups. To pass an editable board to another person, export the project JSON and send that file yourself.

The drawing surface is bounded at 1920×1080. That makes exports predictable and prevents an accidental drag from creating an effectively infinite document. Pan and zoom change the editor view, not the actual output dimensions.

Tools, objects and layers

Select an unlocked object to move it. Rectangles, ellipses, text boxes, sticky notes and images also have a lower-corner resize handle; the layer panel provides keyboard-accessible smaller and larger controls. Objects can be duplicated, deleted, moved forward or backward, and locked against accidental edits. Undo and redo retain up to 100 committed actions in the current editor session.

The layer list mirrors the visual stacking order and gives every object a semantic button. Arrow keys move the selected unlocked object by one board unit, or ten with Shift. Delete removes it, while Ctrl/Cmd+Z and Ctrl/Cmd+Y handle undo and redo. Pointer Events allow the same canvas to accept mouse, pen and touch input; two touch points pan and zoom the view.

Local files, recovery and privacy

Board objects, text and embedded images are not sent through Livewire, added to the URL or submitted to a remote image service. Normal page, asset and analytics requests still happen without board content. The editor temporarily autosaves one bounded working copy in IndexedDB, an on-device browser database. That copy expires after seven days and is not a durable backup.

Project JSON uses a strict versioned schema. Unknown fields, duplicate IDs, unsupported object types, remote image URLs, deceptive image signatures, excessive coordinates and oversized files are rejected before replacing the current board. Images are restricted to PNG, JPEG and WebP with bounded encoded size, dimensions and decoded pixels. Export JSON regularly if the board matters; private browsing, site-data cleanup or browser storage policies can remove the temporary copy.

What each export preserves

• PNG keeps a lossless raster copy of the whole board.
• JPEG creates a compact opaque raster copy.
• SVG keeps vector shapes and text as SVG elements and embeds validated local raster images.
• Project JSON preserves editable objects for this whiteboard’s importer.

These are download files, not share links. JSON is the only format that can be imported for continued editing; PNG, JPEG and SVG are exports rather than round-trip project formats. Browser file creation uses the Canvas toBlob() path, while drawing and gestures use Pointer Events.