A small website based on javascript for converting as much LaTeX-tags to their corresponding Unicode-symbols as possible. A running demo can be found at this location.
The following tags are currently supported (some of them only partially due to lack of suitable symbols):
\alpha | \Downarrow | \leqq | \oslash | \star |
\amalg | \ell | \lfloor | \otimes | \subset |
\angle | \emptyset | \lhd | \P | \subseteq |
\approx | \epsilon | \ll | \parallel | \succ |
\arccos | \equiv | \lneqq | \partial | \succeq |
\arccot | \eta | \lnsim | \perp | \sum |
\arcsin | \eth | \longleftarrow | \phi | \supset |
\arctan | \exists | \Longleftarrow | \Phi | \supseteq |
\ast | \flat | \longleftrightarrow | \pi | \surd |
\asymp | \forall | \Longleftrightarrow | \Pi | \swarrow |
\backslash | \frac | \longmapsto | \pm | \tan |
\bar | \frown | \longrightarrow | \prec | \tanh |
\beta | \gamma | \Longrightarrow | \preceq | \tau |
\bigcirc | \Gamma | \lor | \prime | \textbf |
\bigtriangledown | \ge | \mapsto | \prod | \textit |
\bigtriangleup | \geq | \mathbb | \propto | \theta |
\blacksquare | \gets | \mathcal | \psi | \theta |
\bot | \gg | \mathfrak | \Psi | \Theta |
\bowtie | \gneqq | \measuredangle | \rangle | \Theta |
\Box | \hbar | \mho | \rceil | \times |
\boxtimes | \heartsuit | \mid | \Re | \top |
\bullet | \hookleftarrow | \models | \rfloor | \triangle |
\bumpeq | \hookrightarrow | \mp | \rhd | \triangleleft |
\cap | \idotsint | \mu | \rho | \triangleright |
\cdot | \iff | \nabla | \rightarrow | \unlhd |
\cdots | \iiint | \natural | \Rightarrow | \unrhd |
\chi | \iint | \nearrow | \rightharpoondown | \uparrow |
\circ | \Im | \neg | \rightharpoonup | \Uparrow |
\clubsuit | \imath | \neq | \rightleftharpoons | \updownarrow |
\complement | \implies | \nexists | \S | \Updownarrow |
\cong | \in | \ngeq | \searrow | \uplus |
\copyright | \infty | \ngtr | \sec | \upsilon |
\cos | \int | \ni | \setminus | \upsilon |
\cosh | \iota | \nleq | \sharp | \Upsilon |
\cot | \jmath | \nless | \sigma | \varepsilon |
\coth | \Join | \nmid | \Sigma | \varnothing |
\csc | \kappa | \not | \sim | \varphi |
\cup | \lambda | \notin | \simeq | \varsigma |
\dagger | \Lambda | \nparallel | \sin | \vartheta |
\dashv | \land | \nsubseteq | \sinh | \vdash |
\ddagger | \langle | \nsupseteq | \smile | \vec |
\delta | \lceil | \nu | \spadesuit | \vee |
\Delta | \le | \nwarrow | \sphericalangle | \wedge |
\diamond | \leadsto | \odot | \sqcap | \wp |
\Diamond | \leftarrow | \oiiint | \sqcup | \wr |
\diamondsuit | \Leftarrow | \oiint | \sqrt | \xi |
\div | \leftharpoondown | \oint | \sqsubset | \Xi |
\dot | \leftharpoonup | \omega | \sqsubseteq | \zeta |
\doteq | \leftrightarrow | \Omega | \sqsupset | |
\dots | \Leftrightarrow | \ominus | \sqsupseteq | |
\downarrow | \leq | \oplus | \square |