Which BBCode tags are supported?

`[b]`, `[i]`, `[u]`, `[s]`, `[url]`, `[img]`, `[quote]`, `[code]`, `[list]`, `[*]`, `[color]` (stripped), and `[size]` (stripped) are all handled.

What happens to `[color]` and `[size]` tags?

Color and size tags are stripped since Markdown has no equivalent. The content is preserved.

How are nested quotes handled?

Nested `[quote]` blocks are converted to nested Markdown blockquotes.

Can it handle custom BBCode tags?

Custom tags are preserved as comments so content is not lost.

Markdown · BBCode to MD

Convert BBCode to Markdown

Migrate forum content from BBCode to Markdown. Handles `[b][i][u][url][img][quote][code][list]` — ideal for phpBB/vBulletin to modern MD-based platforms.

Free · No signup · Instant

Input (BBCODE)

Free, no signup. Up to 1 MB per request.

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Forum markupFull tag supportMigration guide

This tool handles

[b]/[i]/[s]/[u] inline formatting
[url=X]Y[/url] and [img] tags
[quote] and [quote="author"] blocks
[list] and [list=1] with [*] items

Not in scope

Custom forum tags ([spoiler], [member=N])
[color] and [size] (content kept, style dropped)

Try it live with the widget above — paste and see the output instantly. For the items under “Not in scope,” the migration guide below covers workarounds and when to use a different tool.

BBCode to Markdown examples

Paste real BBCode in the left column, see the Markdown output on the right.

Inline formatting

BBCode

[b]bold[/b] and [i]italic[/i]

Markdown

**bold** and *italic*

Attributed quote

BBCode

[quote="Alice"]pearls of wisdom[/quote]

Markdown

> **Alice** > pearls of wisdom

Numbered list

BBCode

[list=1][*]first[*]second[/list]

Markdown

1. first 2. second

How BBCode-to-Markdown conversion works

Paste BBCode — Paste your forum post or BBCode-formatted content into the input field.

Convert — Click Convert — bold/italic, links, quotes, code, and lists are mapped to Markdown.

Copy — Copy the Markdown or download as `.md`.

BBCode edge cases we handle

Underline falls back to bold

Markdown has no underline; `[u]` → `**bold**`. Replace with inline HTML `<u>` if you must preserve underline semantics.

Color and size strip, content stays

`[color=red]X[/color]` and `[size=14]X[/size]` lose their styling but keep the content. If color was signalling (moderator warnings), pre-process the source to mark those differently.

Custom tags pass through literally

Forum-specific tags like `[spoiler]`, `[member=N]`, `[youtube]` are not handled — they appear as literal text. Pre-process with search-and-replace if you use them heavily.

Nested quotes become nested blockquotes

A `[quote][quote]outer[/quote] reply[/quote]` pattern produces double-`>` nested blockquotes in the output. This is valid GFM but confirm rendering in your destination.

Frequently asked questions

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