Best Free Online Developer Tools to Use in 2026
A practical, opinionated list of the best free online developer tools worth using in 2026, organized by category so you can find what you need fast.
Aug 08, 2026
HTML Entities • Math Symbol
Math Symbol
Comprehensive mathematical HTML entities covering operators, relations, set theory symbols, logic operators, integrals, and special constants essential for writing formulas and scientific notation in web content.
Tip: search by the symbol itself, HTML entity, unicode, or shortcut text.
58
Entries
Math Symbol
Category
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Quickly locate the right entity and jump to its explanation page without extra navigation.
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Math Symbol entities
Showing 58 entries.
Click a description to open the entity detail view.
| Symbol | Description | HTML Entity | Unicode | Mac shortcut | Windows shortcut | Action |
|---|---|---|---|---|---|---|
| [ |
Left Square Bracket (opening)
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[ | U+005B | ⌥5 | Alt 0091 | Detail |
| ] |
Right Square Bracket (closing)
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] | U+005D | ⌥6 | Alt 0093 | Detail |
| { |
Left Curly Bracket (opening)
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{ | U+007B | ⌥8 | Alt 0123 | Detail |
| } |
Right Curly Bracket (closing)
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} | U+007D | ⌥9 | Alt 0125 | Detail |
| ⟨ |
Left Angle Bracket (opening)
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⟨ | U+3008 | Detail | ||
| ⟩ |
Right Angle Bracket (closing)
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⟩ | U+3009 | Detail | ||
| ∼ |
Similar To
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∼ | U+223C | Detail | ||
| ≈ |
Asymptotic To / Almost Equal To
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≈ | U+2248 | ⌥X | Detail | |
| ≅ |
Congruent
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≅ | U+2245 | Detail | ||
| ≡ |
Equivalent / Identical To
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≡ | U+2261 | Detail | ||
| ≠ |
Not Equal To
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≠ | U+2260 | ⌥0 | Detail | |
| − |
Minus Sign
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− | U+2212 | Detail | ||
| ± |
Plus-minus Sign
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± | U+00B1 | ⌥+ | Alt 0177 | Detail |
| √ |
Radical Sign ("square Root")
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√ | U+221A | ⌥V | Detail | |
| ⋅ |
Dot Operator / Interpunct
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⋅ | U+22C5 | ⇧⌥9 | Detail | |
| × |
Multiplication Sign / Times Sign
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× | U+00D7 | Alt 0215 | Detail | |
| ∗ |
Asterisk Operator
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∗ | U+002A | Detail | ||
| ÷ |
Division Sign (obelus)
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÷ | U+00F7 | ⇧⌥. | Alt 0241 | Detail |
| ¼ |
Fraction One Quarter
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¼ | U+00BC | Alt 0188 | Detail | |
| ½ |
Fraction One Half
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½ | U+00BD | Alt 0189 | Detail | |
| ¾ |
Fraction Three Quarters
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¾ | U+00BE | Alt 1090 | Detail | |
| ∝ |
Proportional To
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∝ | U+221D | Detail | ||
| ∞ |
Infinity Sign
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∞ | U+221E | ⌥, | Detail | |
| < |
Less Than
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< | U+003C | Alt 0060 | Detail | |
| ≤ |
Less Than Or Equal To
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≤ | U+2264 | ⌥< | Detail | |
| > |
Greater Than
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> | U+003E | Alt 0062 | Detail | |
| ≥ |
Greater Than Or Equal To
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≥ | U+2265 | ⇧⌥< | Detail | |
| ƒ |
Mathematical Function F(x)
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ƒ | U+0192 | ⌥F | Alt 0131 | Detail |
| ∫ |
Integral
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∫ | U+222B | ⌥B | Detail | |
| ∂ |
Partial Differential
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∂ | U+2202 | ⌥D | Detail | |
| ∠ |
Angle
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∠ | U+2220 | Detail | ||
| ⊥ |
Perpendicular To / Orthogonal To
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⊥ | U+22A5 | Detail | ||
| ° |
Degree Sign
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° | U+00B0 | ⇧⌥Ü | Alt 0176 | Detail |
| ′ |
Minutes
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′ | U+2032 | Detail | ||
| ″ |
Seconds
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″ | U+2033 | Detail | ||
| ⊕ |
Direct Sum
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⊕ | U+2295 | Detail | ||
| ⊗ |
Tensor Product
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⊗ | U+2297 | Detail | ||
| ∇ |
Nabla / Differential Operator
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∇ | U+2207 | Detail | ||
| ⋅ |
Dot Operator / Scalar Product
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⋅ | U+22C5 | ⇧⌥9 | Detail | |
| × |
Cross Product
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× | U+00D7 | Alt 0215 | Detail | |
| ∧ |
And (logical Conjunction)
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∧ | U+2227 | Detail | ||
| ∨ |
Or (logical Disjunction)
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∨ | U+2228 | Detail | ||
| ¬ |
Not Sign (negation)
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¬ | U+00AC | Alt 0172 | Detail | |
| ∴ |
Therefore
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∴ | U+2234 | Detail | ||
| ∈ |
Element Of
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∈ | U+2208 | Detail | ||
| ∉ |
Not An Element Of
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∉ | U+2209 | Detail | ||
| ∋ |
Contains As Member
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∋ | U+220B | Detail | ||
| ∀ |
For All
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∀ | U+2200 | Detail | ||
| ∃ |
Exists
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∃ | U+2203 | Detail | ||
| ∅ |
Empty Set / Diameter
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∅ | U+2205 | Detail | ||
| ∩ |
Intersection / Cap
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∩ | U+2229 | Detail | ||
| ∪ |
Union / Cup
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∪ | U+222A | Detail | ||
| ⊃ |
Superset Of
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⊃ | U+2283 | Detail | ||
| ⊇ |
Superset Of Or Equal To
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⊇ | U+2287 | Detail | ||
| ⊂ |
Subset Of
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⊂ | U+2282 | Detail | ||
| ⊆ |
Subset Of Or Equal To
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⊆ | U+2286 | Detail | ||
| ⊄ |
Not A Subset Of
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⊄ | U+2284 | Detail | ||
| → |
Material Conditional (implication) Rightwards Arrow
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→ | U+2192 | Detail | ||
| No entities match your search. | ||||||
Other Categories
Space Characters
Special chars & HTML
Latin Letter
Diacritical marks
Greek Alphabet - Capital letters
Greek Alphabet - Small letters
Math Symbol
Currency Symbol
Quotation Marks
Punctuation Marks
Superscript
Arrows
Symbols, Dingbats
Number Forms
Letterlike Symbols
Geometric Shapes
Miscellaneous Symbols
Last updated: 17 Aug 2026
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