Discord output
Discord keeps supported headings, bold, italic, strike, links, quotes and code in its Markdown-style message syntax. Tables are flattened into labelled rows because Discord messages do not provide document table layout.
Copied user, role, channel, everyone and here tokens are changed into inactive readable text. Create intentional mentions in Discord after pasting so they bind to the correct account or role.
Preview and exact text
Preview shows the intended reading experience. Text shows the exact characters that will be copied. Use Text to inspect markers and escaping when a source contains literal asterisks, underscores, angle brackets or mention-like strings.
Paste it into Pasteful. It stays in this tab.