diff --git a/base/Base.jl b/base/Base.jl
index 63728fdba3e4e..ed234bdbc5893 100644
--- a/base/Base.jl
+++ b/base/Base.jl
@@ -512,6 +512,11 @@ function __init__()
     if haskey(ENV, "JULIA_MAX_NUM_PRECOMPILE_FILES")
         MAX_NUM_PRECOMPILE_FILES[] = parse(Int, ENV["JULIA_MAX_NUM_PRECOMPILE_FILES"])
     end
+    if get(ENV, "JULIA_USE_NEW_PARSER", "true") == "true"
+        JuliaSyntax = require(PkgId(
+            UUID((0x70703baa_626e_46a2, 0xa12c_08ffd08c73b4)), "JuliaSyntax"))
+        JuliaSyntax.enable_in_core!()
+    end
     nothing
 end
 
diff --git a/base/boot.jl b/base/boot.jl
index 5f3b99df1c716..cc2cec5ec6e57 100644
--- a/base/boot.jl
+++ b/base/boot.jl
@@ -826,9 +826,11 @@ GlobalRef(m::Module, s::Symbol) = GlobalRef(m, s, bitcast(Ptr{Nothing}, 0))
 # `_parse` must return an `svec` containing an `Expr` and the new offset as an
 # `Int`.
 #
-# The internal jl_parse which will call into Core._parse if not `nothing`.
+# The internal jl_parse will call into Core._parse if not `nothing`.
 _parse = nothing
 
+_setparser!(parser) = setglobal!(Core, :_parse, parser)
+
 # support for deprecated uses of internal _apply function
 _apply(x...) = Core._apply_iterate(Main.Base.iterate, x...)
 
diff --git a/base/compiler/compiler.jl b/base/compiler/compiler.jl
index 3c41c353e86ad..b6e8b2b57e383 100644
--- a/base/compiler/compiler.jl
+++ b/base/compiler/compiler.jl
@@ -170,7 +170,7 @@ include("compiler/bootstrap.jl")
 ccall(:jl_set_typeinf_func, Cvoid, (Any,), typeinf_ext_toplevel)
 
 include("compiler/parsing.jl")
-Core.eval(Core, :(_parse = Compiler.fl_parse))
+Core._setparser!(fl_parse)
 
 end # baremodule Compiler
 ))
diff --git a/base/sysimg.jl b/base/sysimg.jl
index 5a14bf5bfd3b9..00c145c5b8d61 100644
--- a/base/sysimg.jl
+++ b/base/sysimg.jl
@@ -38,6 +38,7 @@ let
         :Unicode,
 
         # 1-depth packages
+        :JuliaSyntax,
         :LinearAlgebra,
         :Markdown,
         :Printf,
diff --git a/contrib/generate_precompile.jl b/contrib/generate_precompile.jl
index acd61be502465..b5ea9bcb58f37 100644
--- a/contrib/generate_precompile.jl
+++ b/contrib/generate_precompile.jl
@@ -156,6 +156,13 @@ if Artifacts !== nothing
     """
 end
 
+JuliaSyntax = get(Base.loaded_modules,
+          Base.PkgId(Base.UUID("70703baa-626e-46a2-a12c-08ffd08c73b4"), "JuliaSyntax"),
+          nothing)
+if JuliaSyntax !== nothing
+    precompile_script *= read(joinpath(pkgdir(JuliaSyntax),
+                                       "sysimage", "precompile_exec.jl"), String) * "\n"
+end
 
 Pkg = get(Base.loaded_modules,
           Base.PkgId(Base.UUID("44cfe95a-1eb2-52ea-b672-e2afdf69b78f"), "Pkg"),
diff --git a/deps/checksums/JuliaSyntax-d3d8fdeaea37bcae05191cad50a326e608035d97.tar.gz/md5 b/deps/checksums/JuliaSyntax-d3d8fdeaea37bcae05191cad50a326e608035d97.tar.gz/md5
new file mode 100644
index 0000000000000..cf4e98bec4a17
--- /dev/null
+++ b/deps/checksums/JuliaSyntax-d3d8fdeaea37bcae05191cad50a326e608035d97.tar.gz/md5
@@ -0,0 +1 @@
+29ccd296e538403829ffd90b3cce67d8
diff --git a/deps/checksums/JuliaSyntax-d3d8fdeaea37bcae05191cad50a326e608035d97.tar.gz/sha512 b/deps/checksums/JuliaSyntax-d3d8fdeaea37bcae05191cad50a326e608035d97.tar.gz/sha512
new file mode 100644
index 0000000000000..d11ea973b1119
--- /dev/null
+++ b/deps/checksums/JuliaSyntax-d3d8fdeaea37bcae05191cad50a326e608035d97.tar.gz/sha512
@@ -0,0 +1 @@
+b3c26d6f7880f069b1f6f21ee3978cd3e797acd9ca6fb1e7ece28cf4dea576872bed3e8c3121d1d6cfe559518a17004595139f9978fd2591669cbe8128f7c1ac
diff --git a/stdlib/.gitignore b/stdlib/.gitignore
index ffbc2f12f52da..05cc5cfc3eecd 100644
--- a/stdlib/.gitignore
+++ b/stdlib/.gitignore
@@ -19,5 +19,7 @@
 /SparseArrays
 /SHA-*
 /SHA
+/JuliaSyntax-*
+/JuliaSyntax
 /*_jll/StdlibArtifacts.toml
 /*/Manifest.toml
diff --git a/stdlib/JuliaSyntax.version b/stdlib/JuliaSyntax.version
new file mode 100644
index 0000000000000..cc66c1185d796
--- /dev/null
+++ b/stdlib/JuliaSyntax.version
@@ -0,0 +1,4 @@
+JULIASYNTAX_BRANCH = main
+JULIASYNTAX_SHA1 = 6465cceaf4b3766e66e4338c15a38e6c7281b1e3
+JULIASYNTAX_GIT_URL := https://github.com/JuliaLang/JuliaSyntax.jl.git
+JULIASYNTAX_TAR_URL = https://api.github.com/repos/JuliaLang/JuliaSyntax.jl/tarball/$1
diff --git a/stdlib/Makefile b/stdlib/Makefile
index d45be468626cd..1473dd1b9193e 100644
--- a/stdlib/Makefile
+++ b/stdlib/Makefile
@@ -47,7 +47,7 @@ STDLIBS = Artifacts Base64 CRC32c Dates Distributed FileWatching \
           SharedArrays Sockets SparseArrays SuiteSparse Test TOML Unicode UUIDs \
           $(JLL_NAMES)
 
-STDLIBS_EXT = Pkg Statistics LibCURL Downloads ArgTools Tar NetworkOptions SuiteSparse SparseArrays SHA
+STDLIBS_EXT = Pkg Statistics LibCURL Downloads ArgTools Tar NetworkOptions SuiteSparse SparseArrays SHA JuliaSyntax
 
 $(foreach module, $(STDLIBS_EXT), $(eval $(call stdlib-external,$(module),$(shell echo $(module) | tr a-z A-Z))))