Share

Diagrams

Diagrams that look designed, not dragged

Shapes that snap into line, arrows that follow them, and icons, tables and components when boxes are not enough. Start from a template, recolour it with a theme, or describe it to your AI and let it build the diagram for you.

Everything in this category

Shapes & connectors

A shape for everything

Fourteen core shapes (flowchart blocks plus an actor, cloud, triangle, star, and speech bubble), a section frame that carries whatever you draw inside it, and seven device frames (browser, monitor, laptop, phone, tablet, foldable, smartwatch). Click to drop one, or drag to draw it at the exact size you want, snapped to line up with its neighbours. A flowchart one minute, a screen the next.

Arrows that bend your way

Connect anything with straight, curved, or angled arrows. Drag the handle on a curve to reshape its bow, or on an elbow to move the bend. Set the thickness, choose the arrowhead shape, filled or hollow triangle, line, circle, or diamond, for UML-style connectors and size it, add a label, and pin an end to a shape so it follows when things move. When several arrows meet at the same point, the heads fan out side by side instead of piling up.

Style every border

Set border strength, switch between solid, dashed, and dotted, and round the corners as much or as little as the shape calls for.

Rich text in any label

Style text right where you type it: bold, italic, underline, and strikethrough, with per-word colours and sizes and bullet or numbered lists. Select a run and a floating toolbar formats just that part, so a label reads exactly how you mean it.

Notes on any element

Pin a note to any shape for the context that should not clutter the canvas. It travels with the element and opens when you need it.

More than boxes and arrows

Mind maps from the keyboard

Type a thought, press Tab for a child or Enter for a sibling, and keep typing. Every node arrives already connected, already selected, and ready for the next word, so a whole branch goes down at the speed you can say it. Nothing re-flows underneath you; tidy it with Auto Layout when you are done.

Swimlanes that hold their contents

Drop a lane for each role, team, or system, and lay the flow inside it. Drag the band and everything fully inside comes along, so reordering a process is one gesture rather than a careful multi-select. The title lives in its own gutter, clear of the work.

Class and entity boxes

A title bar over a list of name and type rows: the box at the heart of a UML class diagram and an ER model alike. Edit the fields from its menu, join them with the hollow triangle and diamond arrowheads UML expects, and skip building one out of stacked tables.

A library of icons

Reach past boxes and arrows: drop a clean single-colour icon, servers, databases, clouds, users, and more, from the icon picker. Each one recolours with the theme and styles like any other shape, so an architecture diagram reads at a glance.

Full-colour technology icons

Build cloud architecture diagrams with brand-accurate icons for AWS, Azure, Cloudflare, and Firebase, plus a vendor-neutral set (Kubernetes, Docker, PostgreSQL, Redis and more), spanning compute, storage, databases, and networking. Search the Technology picker, drop one in, and it lands labelled with its product name.

Tables, fully editable

Drop a table and double-click any cell to type. Insert or delete rows and columns from the cell menu, toggle a header row and a header column, recolour the headers (or reset them to the theme), drag the dividers to set column widths, and pick the cell padding. It lays out and recolours with the rest of the canvas.

Images on the canvas

Drag, drop, or paste a PNG, JPEG, WebP, or GIF straight onto the canvas. Resize and arrange it like any other element. Everything you add lands in your own gallery, ready to reuse in any document without uploading twice.

Link cards that unfurl

Drop a bookmark and paste a URL: it unfurls into a tidy card with the page title, favicon, and preview image. Click through any time. Turn a reference, a doc, or a related diagram into a card your whole team can follow.

Videos, Figma, Docs, or any website

Paste a YouTube or Vimeo link, a Loom recording, a Figma file, a Google Doc, or any web address at all, and it sits on the canvas where the discussion is. Nothing loads until somebody presses play, and the player never steals the pointer, so the board stays draggable while it runs.

Ready-made components

Drop in a polished component and skip the busywork: a banner, a hero, a website-style header, an annotated callout, a row of KPI stats, or numbered process steps. Tap to place it or drag to size it; each one is a single element that follows the tab theme, re-flows as you resize it, and lets you retype any line in place.

Templates & themes

Ninety-one starter templates

Start from a board that already makes sense: flowcharts and mind maps, retrospectives and Kanban, roadmaps and org charts, meeting agendas and risk matrices, wireframes, architecture and UML, even a to-scale floor plan. Browse them by category in the picker, edit one, or start blank.

Twenty-six preset themes

Default, Forest, Ocean, Sunset, Rose, Midnight, Mono and a dozen more, plus multi-colour Rainbow, Pastel, Tropical, Autumn, and Jewel schemes that tint each branch a different hue. One click recolours the canvas, every shape, and every arrow. Default has a light and a dark half, and follows your own appearance.

Build your own theme

Need your brand palette, a house style, or a notation that is not in the list? Build a custom theme, save it to your account, and reuse it across documents just like a built-in one. Edit it any time, and guests get them too.

Set the canvas backdrop

Switch the canvas background between fourteen backdrops, from plain, grid, and lines to crosshatch, waves, isometric, and engineering. Each theme and template picks a fitting default.

Eleven fonts

Set the typeface per element or as a tab-wide default, from eleven Google Fonts spanning sans, serif, slab, display, mono, and handwriting. New tabs inherit it, so every canvas reads consistently.

Neat without trying

Guides that line things up

Move or resize a shape and faint guide lines light up the moment an edge or centre lines up with a neighbour, so you can see exactly why it snapped and lay things out cleanly on a busy canvas. The lines match your theme and fade the instant you let go. Switch them off in Settings if you want a bare canvas.

Size anything to the pixel

Type a width and a height rather than nudging a handle until it looks right. Lock the aspect ratio and one dimension carries the other. It is what drawing a floorplan to scale needs, and what a drag handle can never give you.

Rotate to a preset angle

Tilt a selected shape to a preset 45° angle from the right-click Rotation menu, or type "rotate" in the search palette for quick 90°/180°/270° turns. Fixed steps keep tilted elements consistent, and pinned arrows keep tracking the shape as it turns.

Multi-select with marquee

Switch to the Select tool, drag a box, and act on everything inside at once: move, duplicate, or delete in one step, one Cmd-Z. Or grab the eraser and wipe out whatever you drag across, the whole sweep undone in a single step.

Shift-drag to duplicate

Hold Shift and drag any element, or a whole selection, to peel off a copy: the original stays put, a translucent ghost follows your cursor, and the copy lands where you release, arrows and all.

Format painter

Copy one element's look, its size, colours, text style, opacity, and padding, then brush it onto the next. Consistent diagrams without re-picking every option.

Photoshop-style layers

Split a tab into stacking layers with live previews: hide a slice, lock it, dim it, or merge it down, and keep review notes out of the export. Bring to Front quietly does the layering for you.

Lock anything in place

Lock an element, or a whole tab, and it turns read-only, so a finished part of the canvas cannot be nudged or edited by accident.

Keyboard shortcuts

The moves you repeat have keys: undo and redo, delete, switch tools, and drop a shape, arrow, sticky, or text without reaching for the palette. Hold Cmd and the palette shows each key. A built-in cheat sheet lists them all, and you can switch them off per device.

Tabs

Unlimited tabs per document

Add as many tabs as a document needs. Each is its own canvas with its own theme, and nothing slows down as the stack grows.

Link elements across tabs

Point any element at another tab. Click it and you land on that tab, so a sprawling system stays one click to navigate.

Group tabs into folders

Big document, lots of tabs? Group related tabs into named folders along the tab bar and collapse the ones you are not using. Drag a tab in or out, and a folder opens on its own when you work in it.

Reuse a tab in another document

Copy a tab's full contents into another document you own, as a ready-made starting point you can take further.

Bring it to life

Animate any shape

Give a shape a looping animation to draw the eye or signal status: pulse an attention ring, glow a soft halo, blink a status light, trace the outline, breathe, shimmer, or a heartbeat for gentle emphasis. Pick one of four speeds, choose whether it repeats or plays once, and the format painter copies the motion to the next shape.

Arrows that show the flow

Set an arrow flowing and its line comes alive: marching dashes, travelling dots, a row of beads, a breathing pulse, a soft glow, or a signal packet racing the line, all running toward the target so a data or process diagram reads its own direction. Each flow can repeat or fire once.

A backdrop with motion

Swap the static grid for a living pattern: Flow streams diagonal lines, Drift floats rising motes, Aurora drifts colour glows, Ripple expands gentle rings, and Ribbons sweeps curved lines. Each matches the theme, scales with the size slider, runs as fast or as slow as you set the speed slider, and settles when reduced-motion is on.

Animated icons

Some icons move on their own: a spinner and gear turn, a heartbeat beats, a signal pulses. Pick one from the Animated set of the icon palette and drop it like any other glyph; it doubles as its own still frame.

Tilt the canvas into 3D

Isometric view tips the whole canvas onto an angle and lifts each layer off the one below, so a stack that reads as flat boxes becomes a scene you can see the depth of. Orbit it from the zoom cluster. It is a way of LOOKING at the canvas, not a change to it: nothing moves, and everyone else still sees it flat.

AI & your tools

Build diagrams with AI

Hook livediagram up to Claude or any MCP client at mcp.livediagram.app and let it find, read, create, edit, and share your documents for you. Point it at a system and ask for the diagram; it lands in your account. Signed in, and it runs on the same revocable token (read-only if you prefer), so you can disconnect any time.

An optional AI assistant

Switch it on for a hand on the active tab: Ask answers questions about the diagram without changing it, and Clean tidies sizes, labels, and layout. It works from your selection or the whole tab, and one undo takes it all back. Off by default, and self-hosters bring their own key.

Works with Mermaid

Paste or open a Mermaid flowchart and livediagram lays it out on the canvas, keeping every connection, not just the outline. Export any tab back to Mermaid to copy or download. It is the diagram-as-code format your READMEs, issues, and AI tools already use, so your diagrams travel.

Import a Markdown outline

Bring an outline in from XMind, Obsidian, or any notes: headings and nested bullets become a tidy, themed node-link tree. Pick Markdown in the import dialog: it builds onto the current tab, and one undo takes it back.

Export as PNG, SVG, or PDF

Take any tab out as an image for a doc, a PDF to print, or JSON, Markdown and Excalidraw to move it elsewhere. What you exported is what you drew: same sizes, same colours, same marks, in the same places.

Write your own integrations

Create an API token and call the same REST API the editor uses, under your account, from your own scripts and integrations. Signed in, revocable, six-month tokens, no lock-in.

Explore more of livediagram

Time to start

No sign up required, no subscriptions or payments of any kind, livediagram is completely free and open source.