Fullwidth Left Square Bracket ［
［ (U+FF3B) is a standard Unicode character that you can copy and paste anywhere text is accepted. This page provides a concise reference with safe tips, internal links, and practical guidance so you can use it reliably across apps and platforms.
What it is and where it’s used: Fullwidth Left Square Bracket is part of the Symbols family (block: Halfwidth and Fullwidth Forms). If you need styled or decorative alternatives, try our Fancy Text tool to generate compatible text that works in most modern interfaces.
History & usage: The character depicts FULLWIDTH LEFT SQUARE BRACKET. It brackets groups and quotes in writing and code. In programming, it can delimit parameters or array-like items within fullwidth text to match other script styles. In documents or UI strings, it marks quoted text or lists when fullwidth punctuation is used for consistency. It helps separate elements clearly while preserving typography in mixed scripts. On data formats or templates, it surrounds values or tokens to indicate boundaries in environments that use fullwidth punctuation. Cross‑platform, it appears as a wide bracket and should be read as punctuation by assistive tech, ensuring consistent accessibility across devices and screen readers.
Copy and input: the quickest method is to copy the character here. You can also insert it by its codepoint U+FF3B in many development tools or editors. Some operating systems provide a character viewer or input palette that lets you search by name or code and insert the glyph into documents.
Display and fallback: if you see an empty box (tofu) or a placeholder rectangle, the active font might not include this codepoint. Switching to a font with broader Unicode coverage or using a fallback font usually fixes the issue. On the web, ensure the page’s font stack includes a general‑purpose fallback.
Related references: browse the Categories for similar characters. When choosing a symbol, prefer the official codepoint for semantic clarity and better compatibility with search, copy, and accessibility tooling.
See our category page for related symbols.
Confusables
Technical details
- Codepoint:
U+FF3B - General Category:
Ps - Age:
1.1 - Bidi Class:
ON - Decomposition:
<wide> 005B - Block:
Halfwidth and Fullwidth Forms - Script:
Common - UTF-8:
EF BC BB - UTF-16:
FF3B - UTF-32:
0000FF3B - HTML dec:
［ - HTML hex:
［ - JS escape:
\uFF3B - Python \N{}:
\N{FULLWIDTH LEFT SQUARE BRACKET} - Python \u:
\uFF3B - Python \U:
\U0000FF3B - URL-encoded:
%EF%BC%BB - CSS escape:
\FF3B
How to type / insert
Fast copy: click the Copy button near the top of this page.
By codepoint: in many editors and IDEs, you can insert via the Unicode code U+FF3B or a built‑in character picker.
HTML: use the numeric entity &#xff3b; (hex) or &#65339; (decimal) when an HTML entity is needed.
Compatibility & troubleshooting
Font support: if the symbol does not render, the current font likely lacks this codepoint. Choose a font with broad Unicode coverage or allow a fallback font.
Web pages: ensure your CSS font stack includes a general fallback; avoid relying on images for common symbols to preserve accessibility and copyability.