Diagramate

Sharing and cloud save: send a diagram, continue on another device

About 4 min · Updated 2026-09-06

Three ways to hand a diagram to someone, a share link (content in the link, no server), a share page (short link, password, expiry, view count) and a file; signing in to save to the cloud, opening on another device, and what happens when both sides edited.

Three ways to hand it over

Method Where the content lives Good for
Share link Compressed after # in the URL, never sent to a server Sending to a colleague to edit, valid forever
Share page In the cloud (the diagram you saved), short link Password, expiry, view counts, can be revoked
File Word / PowerPoint with the code appended People who will not open a web page

“Share link” above the preview (on a phone: in the “Download” panel). Opening it generates the link and copies it to the clipboard; send it on. The recipient sees the same diagram in the same theme and can edit straight away; they edit their own copy, not yours.

The link carries the whole diagram's code and theme. Browsers never send the part after # to a server, so there is no copy on Diagramate's side. That also means the link is the content: do not send anything by link that you would not send as text. Compressed code is usually a few hundred to a few thousand characters; above 8000 the dialog warns you, because some chat apps truncate long links; send a file instead.

The format matches the Mermaid live editor: a #pako: link from there opens here when appended to /editor.

Share page: short link, password, expiry

A share page needs the diagram saved to the cloud first (next section). The lower half of the “Share link” dialog then creates a short link of the form /s/xxxx:

  • it opens a branded page showing the latest cloud version of the diagram; save again and the recipient sees the new version on reload;
  • optional password; expiry of 1 / 7 / 30 / 90 days;
  • the list shows how often each link was opened; revoke at any time;
  • the recipient can download PNG / SVG or “Open in the editor” to get their own copy.

Cloud save: continue on another device

Nothing here needs an account: rendering, export and local auto-save work without signing in, and nothing is uploaded. Signing in lives only behind the “Cloud” button in the top bar (on a phone: “Cloud save” in the “Download” panel), to store diagrams on the server and open them elsewhere.

  1. Click “Cloud” → enter your email for a 6-digit code, or sign in with Google.
  2. “Save the current diagram to the cloud” and give it a name. The top bar then shows the name; when the content changes a small dot appears, and “Save new version” in the dialog stores it.
  3. On another device, sign in with the same account: “My diagrams” lists the same diagrams; “Open” replaces the editor content.

The free tier holds 20 diagrams; each stores the code, theme, name and the last 20 versions. Exported files are never uploaded.

On the first sign-in, if this device has auto-saved diagrams, you are asked once whether to import them.

Both sides edited

If the cloud already has a newer version when you save (edited on another device, say), the dialog says so: Overwrite stores your content as the newest version (the previous one stays in history); Use the cloud version discards local changes. Lite users can preview and restore any version from the last 30 days under “History”.

Try it

Generate a share link from this and open it in another browser window:

flowchart LR
    A[Write the code] --> B[Share link]
    B --> C[Colleague opens it]
    C --> D[Each edits their own copy]
Open in the editorEdit the text, switch themes and download PNG, Word or PowerPoint from there.

Try it in the editor

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