Corner Symbol

Copy ⌜ in one tap, or pick from 108 corner characters and 26 ready sets, each with its codes.

Corner Symbol

⌜Top left cornerU+231CReady to copy

134 corner characters and sets. Tap any value to copy it.

134 corner characters and sets. A character and its name both copy the character. A code copies the code.
CharacterNameCode pointAlt codeOption keysHTMLLaTeX
U+231C. The character Unicode itself names top left corner, under the heading Quine corners. \ulcorner in LaTeX needs the amssymb package.
U+231D. Closes the quotation that U+231C opens. W. V. Quine introduced the pair in Mathematical Logic, 1940.
U+231E. The short entity is ⌞, d for down, while the long one is ⌞, l for lower. \llcorner in LaTeX with amssymb.
U+231F. With U+231C it wraps a name from corner to corner. ⌟ in HTML, \lrcorner in LaTeX with amssymb.
Made of U+231C, U+231D, U+231E and U+231F. Top left, top right, bottom left, bottom right, in that order. Delete the ones you do not need.
U+250C. The top left corner of a box. Unicode names a box piece by where its lines run from the middle of the cell: here, down and right. Alt+218 on a number pad.
U+2510. Top right corner of a box: the lines run down and left. Alt+191 on a number pad, ┐ in HTML.
U+2514. Bottom left corner of a box: the lines run up and right. Alt+192 on a number pad.
U+2518. Bottom right corner of a box: the lines run up and left. Alt+217, one below the 218 of the top left corner.
Made of U+250C, U+2510, U+2514 and U+2518. Top left, top right, bottom left, bottom right. All four have an Alt code: 218, 191, 192 and 217.
Made of U+300C and U+300D. The Japanese single quotation marks, kagikakko. Type your own words between the two.
Made of U+256D, U+256E, U+2570 and U+256F. Four arc corners that meet the light lines. None of them has an Alt code or a named HTML entity.

Next step All the Alt codes in one table

How it works

The corner symbol Unicode names as one is ⌜, Top left corner, U+231C. The 134 rows hold box, rounded, double and bracket corners for every position, plus sets of four with the lines that join them.

Read the full guide

Build a box in three lines

Copy the set ┌┐└┘, then ─ and │ from Lines to join them. Line one is ┌, a run of ─, then ┐. Middle lines start and end with │. Line three is └, the same run, then ┘. Keep to one weight, or use the mixed corners. Sets and pairs holds 26 strings: all four corners of a style in one copy, or a pair to type between. Finished frames are on text borders.

Tips
  • Unicode names a box corner by where its lines run: ┌ is Box drawings light down and right, not top left.
  • In the HTML box entities a capital means a double stroke: ┌ is ┌, ╔ is ╔, and ╒ is ╒, doubled on top only.

Questions and answers

What is the Alt code for a corner symbol?

With Num Lock on, hold Alt and type 218 for ┌, 191 for ┐, 192 for └ or 217 for ┘. The 12 double and mixed corners have codes too. Heavy and rounded corners have none, and neither do ⌜ ⌝ ⌞ ⌟.

How do I write a corner symbol in LaTeX?

\ulcorner, \urcorner, \llcorner and \lrcorner print ⌜ ⌝ ⌞ ⌟ in maths mode and need the amssymb package. \lceil, \rceil, \lfloor and \rfloor print ⌈ ⌉ ⌊ ⌋ with no package. The box corners have no macro in the sources this page uses.

What are the ⌜ and ⌝ symbols called?

Unicode names them Top left corner and Top right corner, under the heading Quine corners. W. V. Quine introduced them in his book Mathematical Logic, 1940, for quasi-quotation. Half brackets, ⸢ and ⸣, look similar and mark words an editor added.

Why do my box corners not line up?

Box drawing characters are made to touch their neighbours, which only works where every character is the same width. Paste the box into a monospaced font, such as a code block. In a proportional font the right side drifts.

More tools

Browse Text styles

All 134 corner characters and sets

Start here 12

  • Bottom left corner U+231E. The short entity is ⌞, d for down, while the long one is ⌞, l for lower. \llcorner in LaTeX with amssymb.
  • Bottom right corner U+231F. With U+231C it wraps a name from corner to corner. ⌟ in HTML, \lrcorner in LaTeX with amssymb.
  • Box drawings light down and left U+2510. Top right corner of a box: the lines run down and left. Alt+191 on a number pad, ┐ in HTML.
  • Box drawings light down and right U+250C. The top left corner of a box. Unicode names a box piece by where its lines run from the middle of the cell: here, down and right. Alt+218 on a number pad.
  • Box drawings light up and left U+2518. Bottom right corner of a box: the lines run up and left. Alt+217, one below the 218 of the top left corner.
  • Box drawings light up and right U+2514. Bottom left corner of a box: the lines run up and right. Alt+192 on a number pad.
  • Corner bracket pair Made of U+300C and U+300D. The Japanese single quotation marks, kagikakko. Type your own words between the two.
Show all 134 corner characters and sets (127 more)

Start here, continued

  • Light box corners, all four Made of U+250C, U+2510, U+2514 and U+2518. Top left, top right, bottom left, bottom right. All four have an Alt code: 218, 191, 192 and 217.
  • Quine corners, all four Made of U+231C, U+231D, U+231E and U+231F. Top left, top right, bottom left, bottom right, in that order. Delete the ones you do not need.
  • Rounded box corners, all four Made of U+256D, U+256E, U+2570 and U+256F. Four arc corners that meet the light lines. None of them has an Alt code or a named HTML entity.
  • Top left corner U+231C. The character Unicode itself names top left corner, under the heading Quine corners. \ulcorner in LaTeX needs the amssymb package.
  • Top right corner U+231D. Closes the quotation that U+231C opens. W. V. Quine introduced the pair in Mathematical Logic, 1940.

Sets and pairs 23

  • Black corner triangles, all four Made of U+25E4, U+25E5, U+25E3 and U+25E2. Four filled photo corners: top left, top right, bottom left, bottom right.
  • Black triangles, top left and bottom right Made of U+25E4 and U+25E2. A diagonal pair for a name or a heading typed between the two.
  • Block corners, all four Made of U+259B, U+259C, U+2599 and U+259F. Four thick corners, each made of three filled quarters.
  • Ceilings and floors, all four Made of U+2308, U+2309, U+230A and U+230B. The ceiling pair, then the floor pair. All four have a LaTeX macro that needs no package.
  • Crop marks, all four Made of U+230F, U+230E, U+230D and U+230C. Top left, top right, bottom left, bottom right by name. Around a picture, each one points away from it.
  • Dentistry corners, all four Made of U+23BE, U+23CB, U+23BF and U+23CC. Top left, top right, bottom left, bottom right by shape. Their names swap left and right, because a name says which way the stroke runs.
  • Double box corners, all four Made of U+2554, U+2557, U+255A and U+255D. Top left, top right, bottom left, bottom right. All four have an Alt code: 201, 187, 200 and 188.
  • Double top, single sides, all four Made of U+2552, U+2555, U+2558 and U+255B. The four mixed corners that join a double line across to a single line down.
  • Half brackets, all four Made of U+2E22, U+2E23, U+2E24 and U+2E25. The upper pair, then the lower pair.
  • Halfwidth corner bracket pair Made of U+FF62 and U+FF63. The narrow pair, for your own words in between.
  • Heavy box corners, all four Made of U+250F, U+2513, U+2517 and U+251B. Four heavy corners for the heavy lines. None of them has an Alt code.
  • Heavy top, light sides, all four Made of U+250D, U+2511, U+2515 and U+2519. The four mixed corners that join a heavy line across to a light line down.
  • Light box corners, top left and bottom right Made of U+250C and U+2518. A diagonal pair. Type a name between the two.
  • Light top, heavy sides, all four Made of U+250E, U+2512, U+2516 and U+251A. The four mixed corners that join a light line across to a heavy line down.
  • Outline corner triangles, all four Made of U+25F8, U+25F9, U+25FA and U+25FF. Top left, top right, bottom left, bottom right. The last is U+25FF, the final code point of the Geometric Shapes block.
  • Quine corners, bottom left and top right Made of U+231E and U+231D. The other diagonal, for your own words in between.
  • Quine corners, top left and bottom right Made of U+231C and U+231F. A diagonal pair for a name or a heading typed between the two.
  • Rounded corners, top left and bottom right Made of U+256D and U+256F. The arc version of the diagonal pair, for your own words in between.
  • Single top, double sides, all four Made of U+2553, U+2556, U+2559 and U+255C. The four mixed corners that join a single line across to a double line down.
  • Small quadrants, all four Made of U+2598, U+259D, U+2596 and U+2597. Four filled quarters, one for each corner of the cell.
  • Square bracket corners, all four Made of U+23A1, U+23A4, U+23A3 and U+23A6. The four ends of a pair of square brackets built over several lines.
  • Square four corners U+26F6. All four corners in one character. Unicode files it under Map symbols from ARIB STD B24 and notes its meaning: intersection.
  • White corner bracket pair Made of U+300E and U+300F. The outlined pair. Type a title between the two.

Top left 24

  • Black upper left triangle U+25E4. A filled triangle with its right angle in the top left. In Unicode since version 1.1 (1993), with no named HTML entity.
  • Box drawings double down and right U+2554. Double top left corner. Alt+201 on a number pad; ╔ in HTML, where a capital letter means a double stroke.
  • Box drawings down double and right single U+2553. Top left corner for a single top and double sides. Alt+214 on a number pad.
  • Box drawings down heavy and right light U+250E. Top left corner where a light top meets a heavy side.
  • Box drawings down light and right heavy U+250D. Top left corner where a heavy top meets a light side. The name gives each stroke its own weight.
  • Box drawings down single and right double U+2552. Top left corner for a double top and single sides. Alt+213 under code page 437; code page 850 put a dotless i at that number.
  • Box drawings heavy down and right U+250F. Heavy top left corner. No Alt code and no named HTML entity: code page 437 has light and double lines only.
  • Box drawings light arc down and right U+256D. Rounded top left corner. Unicode files the four arcs under Character cell arcs, and they join the light lines ─ and │.
  • Dentistry symbol light vertical and top right U+23BE. From Palmer notation, where a corner marks the quarter of the mouth a tooth is in. Its stroke runs along the top of the cell, not through the middle as in ┌.
  • Halfwidth left corner bracket U+FF62. From the Halfwidth and Fullwidth Forms block. Unicode defines it as U+300C drawn narrow.
  • Left and upper one eighth block U+1FB7D. A thin top left corner that hugs the edge of the cell, from Symbols for Legacy Computing. Added in Unicode 13.0 (2020).
  • Left ceiling U+2308. With ⌉ it writes the ceiling of a number: the least whole number not below it. \lceil in LaTeX, no package needed.
  • Left corner bracket U+300C. Opens a quotation in Japanese, where the pair is called kagikakko. Shaped like a top left corner.
  • Left square bracket upper corner U+23A1. A piece for building a tall square bracket over several lines, from the Bracket pieces of Unicode 3.2 (2002).
  • Left white corner bracket U+300E. The outlined bracket. Japanese uses the white pair for a quotation inside a quotation and for book titles.
  • North west arrow to corner U+21F1. An arrow running into a top left corner. Unicode files it with the keyboard symbols and notes: home.
  • Quadrant upper left U+2598. The top left quarter of the cell, filled. Unicode files the quadrants under Terminal graphic characters, added in version 3.2 (2002).
  • Quadrant upper left and upper right and lower left U+259B. Three quarters filled and the bottom right left empty: a thick top left corner.
  • Reversed not sign U+2310. A small top left corner. Alt+169 on a number pad. Unicode's note for it: beginning of line.
  • Right angle substitution marker U+2E00. A small raised corner from the New Testament editorial symbols. Added in Unicode 4.1 (2005).
  • Top left crop U+230F. A crop mark for the top left of a picture. Crops face outward, so it is drawn like a bottom right corner.
  • Top left half bracket U+2E22. Half brackets mark words an editor has added, as in a translation. Added in Unicode 5.1 (2008).
  • Upper left corner with dot U+27D4. A maths operator. Unicode's note for it: pushout.
  • Upper left triangle U+25F8. The outline version, added in Unicode 3.2 (2002). ◸ in HTML.

Top right 20

  • Black upper right triangle U+25E5. A filled triangle with its right angle in the top right.
  • Box drawings double down and left U+2557. Double top right corner. Alt+187 on a number pad.
  • Box drawings down double and left single U+2556. Top right corner for a single top and double sides. Alt+183 on a number pad.
  • Box drawings down heavy and left light U+2512. Top right corner for a light top and heavy sides.
  • Box drawings down light and left heavy U+2511. Top right corner for a heavy top and light sides.
  • Box drawings down single and left double U+2555. Top right corner for a double top and single sides. ╕ in HTML: a small d for the single stroke down, a capital L for the double stroke left.
  • Box drawings heavy down and left U+2513. Heavy top right corner. Pair it with the heavy lines ━ and ┃ so the weight stays the same.
  • Box drawings light arc down and left U+256E. Rounded top right corner. The box drawing characters have no heavy or double arc, so a rounded box is always light.
  • Dentistry symbol light vertical and top left U+23CB. Shaped like a top right corner, with the stroke along the top of the cell. Unicode took the dentistry characters from the Japanese standard JIS X 0213.
  • Not sign U+00AC. The logic sign for not, and a small top right corner. Alt+170 or Alt+0172, Option+L, ¬ in HTML. Unicode's note: angled dash, in typography.
  • Presentation form for vertical left corner bracket U+FE41. The opening corner bracket turned a quarter turn for vertical text, which makes it a top right corner.
  • Presentation form for vertical left white corner bracket U+FE43. The white opening bracket turned for vertical text.
  • Quadrant upper left and upper right and lower right U+259C. Three quarters filled and the bottom left left empty: a thick top right corner.
  • Quadrant upper right U+259D. The top right quarter of the cell, filled.
  • Right and upper one eighth block U+1FB7E. The thin top right corner of the same set. Added in Unicode 13.0 (2020).
  • Right ceiling U+2309. Closes a ceiling. Kenneth Iverson introduced the notation in A Programming Language, 1962.
  • Right square bracket upper corner U+23A4. The top of a tall right square bracket. U+23A5 is the extension that goes under it.
  • Top right crop U+230E. Marks the top right of a picture, so it is drawn like a bottom left corner. ⌎ in HTML.
  • Top right half bracket U+2E23. Closes what U+2E22 opens. It has no Alt code, no named HTML entity and no LaTeX macro in the sources this page uses.
  • Upper right triangle U+25F9. Outline triangle for a top right corner. ◹ in HTML.

Bottom left 24

  • Black lower left triangle U+25E3. A filled triangle with its right angle in the bottom left.
  • Bottom left crop U+230D. Marks the bottom left of a picture, so it is drawn like a top right corner. ⌍ in HTML.
  • Bottom left half bracket U+2E24. The lower opening half bracket. In editions of papyri, half brackets enclose text restored from another source.
  • Box drawings double up and right U+255A. Double bottom left corner. Alt+200, one below the 201 of the top left.
  • Box drawings heavy up and right U+2517. Heavy bottom left corner. In Unicode since version 1.1 (1993), like every corner of the Box Drawing block listed here.
  • Box drawings light arc up and right U+2570. Rounded bottom left corner. Mind the code order: U+256F is the bottom right and U+2570 the bottom left.
  • Box drawings up double and right single U+2559. Bottom left corner for a single bottom and double sides. Alt+211 on a number pad.
  • Box drawings up heavy and right light U+2516. Bottom left corner for a light bottom and heavy sides.
  • Box drawings up light and right heavy U+2515. Bottom left corner for a heavy bottom and light sides.
  • Box drawings up single and right double U+2558. Bottom left corner for a double bottom and single sides. Alt+212 on a number pad.
  • Dentistry symbol light vertical and bottom right U+23BF. Shaped like a bottom left corner, with the stroke along the bottom of the cell.
  • Left and lower one eighth block U+1FB7C. The thin bottom left corner, and the first of the four in code order. Added in Unicode 13.0 (2020).
  • Left floor U+230A. With ⌋ it writes the floor of a number: the greatest whole number not above it. \lfloor in LaTeX.
  • Left square bracket lower corner U+23A3. The foot of a tall left square bracket. U+23A2 is the extension that goes above it.
  • Lower left triangle U+25FA. Outline triangle for a bottom left corner. ◺ in HTML.
  • Measured right angle with dot U+299D. A right angle with an arc and a dot. ⦝ in HTML.
  • Presentation form for vertical right corner bracket U+FE42. The closing corner bracket turned for vertical text: a bottom left corner.
  • Presentation form for vertical right white corner bracket U+FE44. The white closing bracket turned for vertical text. Unicode defines all four vertical forms as variants of U+300C to U+300F.
  • Quadrant lower left U+2596. The bottom left quarter of the cell, filled.
  • Quadrant upper left and lower left and lower right U+2599. Three quarters filled and the top right left empty: a thick bottom left corner.
  • Right angle U+221F. The geometry sign, shaped like a bottom left corner. Alt+28 on a number pad, one of the PC graphics characters behind codes 1 to 31. Unicode's note: with, in chess notation.
  • Right angle variant with square U+299C. The right angle with the small square in its corner. ⦜ in HTML; added in Unicode 3.2 (2002).
  • Right angle with arc U+22BE. A right angle with its arc drawn in. ⊾ in HTML.
  • Turned not sign U+2319. A small bottom left corner. Unicode's note for it: line marker. Unlike the other two not signs, it has no Alt code.

Bottom right 25

  • Black lower right triangle U+25E2. A filled triangle with its right angle in the bottom right. It comes first of the four in code order, U+25E2 to U+25E5.
  • Bottom right crop U+230C. Marks the bottom right of a picture, so it is drawn like a top left corner. Unicode's note: set of four crop corners, arranged facing outward.
  • Bottom right half bracket U+2E25. Closes what U+2E24 opens. Quine corners are sometimes used in place of half brackets.
  • Box drawings double up and left U+255D. Double bottom right corner. Alt+188, one above the 187 of the top right.
  • Box drawings heavy up and left U+251B. Heavy bottom right corner. In an office program that converts code points, type 251B, press Alt, then X.
  • Box drawings light arc up and left U+256F. Rounded bottom right corner. Unicode marks the width of box drawing characters as ambiguous: narrow by default, wide in East Asian text.
  • Box drawings up double and left single U+255C. Bottom right corner for a single bottom and double sides. Alt+189 on a number pad.
  • Box drawings up heavy and left light U+251A. Bottom right corner for a light bottom and heavy sides. The 16 code points from U+250C to U+251B are all corners, in every mix of light and heavy.
  • Box drawings up light and left heavy U+2519. Bottom right corner for a heavy bottom and light sides.
  • Box drawings up single and left double U+255B. Bottom right corner for a double bottom and single sides. Alt+190 on a number pad.
  • Dentistry symbol light vertical and bottom left U+23CC. Shaped like a bottom right corner. It is the last of the dentistry characters, U+23BE to U+23CC.
  • Halfwidth right corner bracket U+FF63. The narrow form of U+300D. Unicode lists both as halfwidth, against wide for the full-size pair.
  • Lower right corner with dot U+27D3. A maths operator. Unicode's note for it: pullback.
  • Lower right triangle U+25FF. Outline triangle for a bottom right corner, and the only one of the four with no named HTML entity: ⊿ belongs to U+22BF.
  • Modifier letter lower right corner angle U+A71A. A raised bottom right corner, filed under Chinantec tone marks. Added in Unicode 5.0.
  • Quadrant lower right U+2597. The bottom right quarter of the cell, filled.
  • Quadrant upper right and lower left and lower right U+259F. Three quarters filled and the top left left empty: a thick bottom right corner. It is the last character of the Block Elements block.
  • Reversed right angle U+2BFE. The mirror of ∟, which Unicode files under chess notation with the note: without. Added in Unicode 11.0 (2018).
  • Right and lower one eighth block U+1FB7F. The thin bottom right corner. Added in Unicode 13.0 (2020).
  • Right corner bracket U+300D. Closes the quotation. Shaped like a bottom right corner, so the pair sits diagonally across the words.
  • Right floor U+230B. Closes a floor. ⌋ in HTML, \rfloor in LaTeX.
  • Right square bracket lower corner U+23A6. The foot of a tall right square bracket.
  • Right triangle U+22BF. A maths sign with its right angle in the bottom right. It holds the entity ⊿, which the outline triangle U+25FF lacks.
  • Right white corner bracket U+300F. Closes the white pair. In Unicode names, white means outlined and black means filled.
  • South east arrow to corner U+21F2. An arrow running into a bottom right corner. Unicode's note for it: end.

Lines to join them 6

  • Box drawings double horizontal U+2550. The line for the double corners. Alt+205 on a number pad; ═ with a capital H.
  • Box drawings double vertical U+2551. The side of a double box. Alt+186 on a number pad; ║ with a capital V.
  • Box drawings heavy horizontal U+2501. The line for the heavy corners. No Alt code.
  • Box drawings heavy vertical U+2503. The side of a heavy box. No Alt code.
  • Box drawings light horizontal U+2500. Joins two light corners side by side. Alt+196 on a number pad, ─ in HTML. Repeat it to set the width of the box.
  • Box drawings light vertical U+2502. The side of a light box. Alt+179 on a number pad. Put one at each end of every middle line.

How this list was compiled: Names, and the code points they belong to, are checked against UnicodeData.txt, version 18.0.0 (https://www.unicode.org/Public/18.0.0/ucd/UnicodeData.txt), and printed in sentence case. Notes that say Unicode's note or Unicode files it quote the headings and notes of NamesList.txt of the same version (https://www.unicode.org/Public/18.0.0/ucd/NamesList.txt); the version a character was added in is from DerivedAge.txt (https://www.unicode.org/Public/18.0.0/ucd/DerivedAge.txt), block names and ranges are from Blocks.txt, widths are from EastAsianWidth.txt as explained in https://www.unicode.org/reports/tr11/, and the years are from https://www.unicode.org/history/publicationdates.html. Alt codes are from the code page 437 table (https://www.unicode.org/Public/MAPPINGS/VENDORS/MICSFT/PC/CP437.TXT), the PC graphics table for codes 1 to 31 (https://www.unicode.org/Public/MAPPINGS/VENDORS/MISC/IBMGRAPH.TXT) and the code page 1252 table (https://www.unicode.org/Public/MAPPINGS/VENDORS/MICSFT/WINDOWS/CP1252.TXT); the dotless i at 213 is from the code page 850 table (https://www.unicode.org/Public/MAPPINGS/VENDORS/MICSFT/PC/CP850.TXT). Typing a code point and then Alt and X is from https://support.microsoft.com/en-us/office/insert-ascii-or-unicode-latin-based-symbols-and-characters-d13f58d3-7bcb-44a7-a4d5-972ee12e50e0. Option keys were read from a U.S. keyboard layout; other layouts differ. HTML entity names are from https://html.spec.whatwg.org/entities.json, the HTML 4 name first where there is one, else the shortest. LaTeX macros are listed only when LaTeX's own fontdef.dtx (https://raw.githubusercontent.com/latex3/latex2e/develop/base/fontdef.dtx) or the amssymb and amsfonts sources (https://mirrors.ctan.org/fonts/amsfonts/source/) define them, matched to a code point through unicode-math-table.tex (https://github.com/latex3/unicode-math). What the marks are for, as the articles record it: Quine corners, https://en.wikipedia.org/wiki/Quasi-quotation; half brackets, https://en.wikipedia.org/wiki/Bracket; Japanese corner brackets, https://en.wikipedia.org/wiki/Japanese_punctuation; the dentistry corners, https://en.wikipedia.org/wiki/Palmer_notation; ceilings and floors, https://en.wikipedia.org/wiki/Floor_and_ceiling_functions; box drawing, https://en.wikipedia.org/wiki/Box-drawing_characters. Which way each corner faces was checked by drawing every character. The last group holds characters that one ordinary computer had no font for on the day this list was checked; your device may differ. Their positions are taken from their names. What is listed: single characters drawn as one right-angled or rounded corner, the six lines that join the box corners, and this site's own sets of four and pairs, which are several of those characters in a row with nothing between them. A position chip says where the piece goes on a frame; crop marks follow their names and everything else follows its shape. Left out: tees, crosses and the rest of the Box Drawing block, finished frames (they are on the text borders page), ordinary brackets, and the diagonal and sextant pieces of Symbols for Legacy Computing. The Start here group, the made rows and the order are this site's own choice. All sources were checked on 2026-09-19. Licence: own work (facts from the Unicode Character Database, Unicode License v3, and from Wikipedia, CC BY-SA 4.0, restated in our own words; aliases and notes marked as Unicode's are quoted from NamesList.txt, Copyright © 1991-2026 Unicode, Inc., https://www.unicode.org/license.txt)