Language Support

The following languages and Language Servers are supported. To use Language Server features, you must first install the appropriate Language Server.

You can check the language support in your installed helix version with hx --health.

Also see the Language Configuration docs and the Adding Languages guide for more language configuration information.

Language	Syntax Highlighting	Treesitter Textobjects	Auto Indent	Rainbow Brackets	Default LSP
astro	✓
awk	✓	✓			`awk-language-server`
bash	✓	✓	✓	✓	`bash-language-server`
bass	✓				`bass`
beancount	✓
bibtex	✓				`texlab`
bicep	✓				`bicep-langserver`
blueprint	✓				`blueprint-compiler`
c	✓	✓	✓	✓	`clangd`
c-sharp	✓	✓			`OmniSharp`
cabal
cairo	✓	✓	✓		`cairo-language-server`
capnp	✓		✓
clojure	✓			✓	`clojure-lsp`
cmake	✓	✓	✓		`cmake-language-server`
comment	✓
common-lisp	✓			✓	`cl-lsp`
cpon	✓		✓
cpp	✓	✓	✓	✓	`clangd`
crystal	✓	✓			`crystalline`
css	✓			✓	`vscode-css-language-server`
cue	✓				`cuelsp`
d	✓	✓	✓		`serve-d`
dart	✓		✓		`dart`
devicetree	✓
dhall	✓	✓			`dhall-lsp-server`
diff	✓
dockerfile	✓				`docker-langserver`
dot	✓				`dot-language-server`
dtd	✓
edoc	✓
eex	✓
ejs	✓
elixir	✓	✓	✓	✓	`elixir-ls`
elm	✓	✓			`elm-language-server`
elvish	✓				`elvish`
env	✓
erb	✓
erlang	✓	✓		✓	`erlang_ls`
esdl	✓
fish	✓	✓	✓
forth	✓				`forth-lsp`
fortran	✓		✓		`fortls`
fsharp	✓				`fsautocomplete`
gas	✓	✓
gdscript	✓	✓	✓
gemini	✓
git-attributes	✓
git-commit	✓	✓
git-config	✓
git-ignore	✓
git-rebase	✓
gleam	✓	✓			`gleam`
glsl	✓	✓	✓
go	✓	✓	✓	✓	`gopls`
godot-resource	✓
gomod	✓				`gopls`
gotmpl	✓				`gopls`
gowork	✓				`gopls`
graphql	✓				`graphql-lsp`
hare	✓
haskell	✓	✓			`haskell-language-server-wrapper`
haskell-persistent	✓
hcl	✓		✓		`terraform-ls`
heex	✓	✓			`elixir-ls`
hosts	✓
html	✓			✓	`vscode-html-language-server`
hurl	✓		✓
idris					`idris2-lsp`
iex	✓
ini	✓
java	✓	✓	✓	✓	`jdtls`
javascript	✓	✓	✓	✓	`typescript-language-server`
jinja	✓
jsdoc	✓
json	✓		✓	✓	`vscode-json-language-server`
json5	✓
jsonnet	✓				`jsonnet-language-server`
jsx	✓	✓	✓	✓	`typescript-language-server`
julia	✓	✓	✓		`julia`
just	✓	✓	✓
kdl	✓
kotlin	✓				`kotlin-language-server`
latex	✓	✓			`texlab`
lean	✓				`lean`
ledger	✓
llvm	✓	✓	✓
llvm-mir	✓	✓	✓
llvm-mir-yaml	✓		✓
lua	✓	✓	✓		`lua-language-server`
make	✓
markdoc	✓				`markdoc-ls`
markdown	✓				`marksman`
markdown.inline	✓
matlab	✓	✓	✓
mermaid	✓
meson	✓		✓
mint					`mint`
msbuild	✓		✓
nasm	✓	✓
nickel	✓		✓		`nls`
nim	✓	✓	✓		`nimlangserver`
nix	✓			✓	`nil`
nu	✓
nunjucks	✓
ocaml	✓		✓		`ocamllsp`
ocaml-interface	✓				`ocamllsp`
odin	✓		✓		`ols`
opencl	✓	✓	✓		`clangd`
openscad	✓				`openscad-lsp`
org	✓
pascal	✓	✓			`pasls`
passwd	✓
pem	✓
perl	✓	✓	✓		`perlnavigator`
php	✓	✓	✓		`intelephense`
po	✓	✓
pod	✓
ponylang	✓	✓	✓
prisma	✓				`prisma-language-server`
prolog					`swipl`
protobuf	✓		✓		`bufls`, `pb`
prql	✓
purescript	✓	✓			`purescript-language-server`
python	✓	✓	✓	✓	`pylsp`
qml	✓		✓		`qmlls`
r	✓				`R`
racket	✓			✓	`racket`
regex	✓			✓
rego	✓				`regols`
rescript	✓	✓			`rescript-language-server`
rmarkdown	✓		✓		`R`
robot	✓				`robotframework_ls`
ron	✓		✓
rst	✓
ruby	✓	✓	✓	✓	`solargraph`
rust	✓	✓	✓	✓	`rust-analyzer`
sage	✓	✓
scala	✓		✓		`metals`
scheme	✓			✓
scss	✓			✓	`vscode-css-language-server`
slint	✓		✓		`slint-lsp`
smithy	✓				`cs`
sml	✓
solidity	✓				`solc`
sql	✓
sshclientconfig	✓
starlark	✓	✓		✓
strace	✓
svelte	✓		✓		`svelteserver`
sway	✓	✓	✓		`forc`
swift	✓				`sourcekit-lsp`
t32	✓
tablegen	✓	✓	✓
task	✓
templ	✓				`templ`
tfvars	✓		✓		`terraform-ls`
todotxt	✓
toml	✓			✓	`taplo`
tsq	✓			✓
tsx	✓	✓	✓	✓	`typescript-language-server`
twig	✓
typescript	✓	✓	✓	✓	`typescript-language-server`
ungrammar	✓
unison	✓
uxntal	✓
v	✓	✓	✓		`v-analyzer`
vala	✓				`vala-language-server`
verilog	✓	✓			`svlangserver`
vhdl	✓				`vhdl_ls`
vhs	✓
vue	✓				`vue-language-server`
wast	✓
wat	✓
webc	✓
wgsl	✓				`wgsl_analyzer`
wit	✓		✓
wren	✓	✓	✓
xit	✓
xml	✓		✓	✓
yaml	✓		✓	✓	`yaml-language-server`, `ansible-language-server`
yuck	✓
zig	✓	✓	✓	✓	`zls`