Limits

Document title length

50 characters

The Title field stops accepting text at 50 characters. The title becomes the attachment filename.

Global page results per fetch

50 issues

The Capable Markdown page loads 50 issues at a time; Show more fetches the next set.

Large document preview

About 1 million characters

Read-only previews longer than this switch to a viewer that renders in chunks as you scroll, so the browser's find-in-page may not find text further down.

Simultaneous image loads

20

At most 20 images are fetched at once, so image-heavy documents load in waves.

Diagram languages

28

Only these render as diagrams: actdiag, blockdiag, bpmn, bytefield, c4plantuml, d2, dbml, ditaa, erd, excalidraw, graphviz, mermaid, nomnoml, nwdiag, packetdiag, pikchr, plantuml, rackdiag, seqdiag, structurizr, svgbob, symbolator, tikz, umlet, vega, vegalite, wavedrom and wireviz. A code block in any other language stays as code.

Built-in templates

17

General purpose (4), Technical documentation (7), Project Planning (6). You cannot add your own templates in Jira.

Session token lifetime

20 minutes

The short-lived token that lets diagrams and web images load is refreshed automatically before it expires, and again when you return to the window.

Raw HTML in Markdown

Not rendered

The viewer strips HTML, so HTML tags embedded in a Markdown document do not render.

Document version history

None

Editing replaces the attachment; Jira keeps no earlier version of the file, and the app stores no version history of its own.