diff --git a/api/src/index.js b/api/src/index.js
index ba234fe..70878ea 100644
--- a/api/src/index.js
+++ b/api/src/index.js
@@ -39,6 +39,13 @@ app.post(
             isArray: {
                 errorMessage: 'Supplied args is not an array',
             },
+        },
+        stdin: {
+            in: 'body',
+            optional: true,
+            isString: {
+                errorMessage: 'Supplied stdin is not a string',
+            },
         }
     }),
     async (req, res) => {
@@ -49,7 +56,7 @@ app.post(
                 language.aliases.includes(req.body.language.toLowerCase())
             );
 
-            const { stdout, stderr, output, ran } = await execute(language, req.body.source, req.body.args);
+            const { stdout, stderr, output, ran } = await execute(language, req.body.source, req.body.args, req.body.stdin);
 
             res.status(200).json({
                 ran,
diff --git a/cli/execute b/cli/execute
index a62d120..a8dc72c 100755
--- a/cli/execute
+++ b/cli/execute
@@ -26,7 +26,7 @@ const [languageName, sourceFile, ...args] = process.argv.slice(2);
         return;
     }
 
-    const { output } = await execute(language, source, args);
+    const { output } = await execute(language, source, '', args);
 
     console.log(output);
 })();
diff --git a/lxc/execute b/lxc/execute
index 42d5b52..14db573 100755
--- a/lxc/execute
+++ b/lxc/execute
@@ -14,13 +14,15 @@ epoch=$(date +%s%N)
 basepath="/var/lib/lxc/piston/rootfs"
 filepath="/tmp/$epoch/code.code"
 argpath="/tmp/$epoch/args.args"
+stdinpath="/tmp/$epoch/stdin.stdin"
 arg=$(basename $argpath)
 
 # write arg file
 mkdir -p $basepath/tmp/$epoch
 chmod 777 $basepath/tmp/$epoch
 cat $2 > $basepath$filepath
-echo "${@:3}" > $basepath$argpath
+cat $3 > $basepath$argpath
+echo "${@:4}" > $basepath$argpath
 
 # process incrementor
 exec 200>$dir/lockfile
diff --git a/lxc/executors/bash b/lxc/executors/bash
index c13ad07..410e383 100755
--- a/lxc/executors/bash
+++ b/lxc/executors/bash
@@ -1,2 +1,2 @@
 cd /tmp/$2
-runuser runner$1 -c "cd /tmp/$2 ; cat args.args | xargs -d '\n' timeout -s KILL 3 bash code.code"
+runuser runner$1 -c "cd /tmp/$2 ; cat args.args | xargs -d '\n' timeout -s KILL 3 bash code.code < stdin.stdin"
diff --git a/lxc/executors/brainfuck b/lxc/executors/brainfuck
index b4458a0..94fc7d9 100755
--- a/lxc/executors/brainfuck
+++ b/lxc/executors/brainfuck
@@ -1,2 +1,2 @@
 cd /tmp/$2
-runuser runner$1 -c "cd /tmp/$2 ; cat args.args | xargs -d '\n' timeout -s KILL 3 brainfuck code.code"
+runuser runner$1 -c "cd /tmp/$2 ; cat args.args | xargs -d '\n' timeout -s KILL 3 brainfuck code.code < stdin.stdin"
diff --git a/lxc/executors/c b/lxc/executors/c
index 3130257..79ba5b0 100755
--- a/lxc/executors/c
+++ b/lxc/executors/c
@@ -1,4 +1,4 @@
 runuser runner$1 -c "\
     cd /tmp/$2 ; \
     gcc -std=c11 -o binary -x c code.code ; \
-    cat args.args | xargs -d '\n' timeout -s KILL 3 ./binary"
+    cat args.args | xargs -d '\n' timeout -s KILL 3 ./binary < stdin.stdin"
diff --git a/lxc/executors/cpp b/lxc/executors/cpp
index 4b8c6cf..cfb02dd 100755
--- a/lxc/executors/cpp
+++ b/lxc/executors/cpp
@@ -1,4 +1,4 @@
 runuser runner$1 -c "\
     cd /tmp/$2 ; \
     g++ -std=c++17 -o binary -x c++ code.code ; \
-    cat args.args | xargs -d '\n' timeout -s KILL 3 ./binary"
+    cat args.args | xargs -d '\n' timeout -s KILL 3 ./binary < stdin.stdin"
diff --git a/lxc/executors/csharp b/lxc/executors/csharp
index 2c742c7..f2ee2ea 100755
--- a/lxc/executors/csharp
+++ b/lxc/executors/csharp
@@ -1,4 +1,4 @@
 runuser runner$1 -c "\
     cd /tmp/$2 ; \
     mcs $(echo code.code | sed 's/\///') -nowarn:0219 -out:binary ; \
-    cat args.args | xargs -d '\n' timeout -s KILL 3 mono binary"
+    cat args.args | xargs -d '\n' timeout -s KILL 3 mono binary < stdin.stdin"
diff --git a/lxc/executors/deno b/lxc/executors/deno
index b466288..1a92dc8 100755
--- a/lxc/executors/deno
+++ b/lxc/executors/deno
@@ -1,7 +1,7 @@
 cd /tmp/$2
 
 if [[ -z $(grep '[^[:space:]]' args.args) ]]; then
-    runuser runner$1 -c "cd /tmp/$2 ; timeout -s KILL 3 deno run code.code"
+    runuser runner$1 -c "cd /tmp/$2 ; timeout -s KILL 3 deno run code.code < stdin.stdin"
 else
-    runuser runner$1 -c "cd /tmp/$2 ; cat args.args | xargs -d '\n' timeout -s KILL 3 deno run code.code"
+    runuser runner$1 -c "cd /tmp/$2 ; cat args.args | xargs -d '\n' timeout -s KILL 3 deno run code.code < stdin.stdin"
 fi
diff --git a/lxc/executors/elixir b/lxc/executors/elixir
index 49f9679..664501f 100755
--- a/lxc/executors/elixir
+++ b/lxc/executors/elixir
@@ -3,5 +3,5 @@ cd /tmp/$2
 if [[ -z $(grep '[^[:space:]]' args.args) ]]; then
     runuser runner$1 -c "cd /tmp/$2 ; timeout -s KILL 3 elixir code.code"
 else
-    runuser runner$1 -c "cd /tmp/$2 ; cat args.args ; xargs -d '\n' timeout -s KILL 3 elixir code.code"
+    runuser runner$1 -c "cd /tmp/$2 ; cat args.args ; xargs -d '\n' timeout -s KILL 3 elixir code.code < stdin.stdin"
 fi
diff --git a/lxc/executors/emacs b/lxc/executors/emacs
index 31f6186..6fb0553 100755
--- a/lxc/executors/emacs
+++ b/lxc/executors/emacs
@@ -3,5 +3,5 @@ cd /tmp/$2
 if [[ -z $(grep '[^[:space:]]' args.args) ]]; then
     runuser runner$1 -c "cd /tmp/$2 ; timeout -s KILL 3 emacs -Q --script code.code"
 else
-    runuser runner$1 -c "cd /tmp/$2 ; cat args.args | xargs -d '\n' timeout -s KILL 3 emacs -Q --script code.code"
+    runuser runner$1 -c "cd /tmp/$2 ; cat args.args | xargs -d '\n' timeout -s KILL 3 emacs -Q --script code.code < stdin.stdin"
 fi
diff --git a/lxc/executors/go b/lxc/executors/go
index 063af21..b713027 100755
--- a/lxc/executors/go
+++ b/lxc/executors/go
@@ -3,4 +3,4 @@ cp code.code interim.go
 file="interim.go"
 go build $file
 file=${file%%.*}
-runuser runner$1 -c "cd /tmp/$2 ; cat args.args | xargs -d '\n' timeout -s KILL 3 ./$file"
+runuser runner$1 -c "cd /tmp/$2 ; cat args.args | xargs -d '\n' timeout -s KILL 3 ./$file < stdin.stdin"
diff --git a/lxc/executors/haskell b/lxc/executors/haskell
index 7593b60..becc27f 100755
--- a/lxc/executors/haskell
+++ b/lxc/executors/haskell
@@ -4,4 +4,4 @@ mv code.code code.hs
 runuser runner$1 -c "\
     cd /tmp/$2 ; \
     ghc -dynamic -o binary code.hs > /dev/null 2>&1 ; \
-    cat args.args | xargs -d '\n' timeout -s KILL 3 ./binary"
+    cat args.args | xargs -d '\n' timeout -s KILL 3 ./binary < stdin.stdin"
diff --git a/lxc/executors/java b/lxc/executors/java
index 6fc09e0..7f84d81 100755
--- a/lxc/executors/java
+++ b/lxc/executors/java
@@ -6,4 +6,4 @@ mv interim.java $name.java
 runuser runner$1 -c "\
     cd /tmp/$2 ; \
     javac $name.java ; \
-    cat args.args | xargs -d '\n' timeout -s KILL 3 java $name"
+    cat args.args | xargs -d '\n' timeout -s KILL 3 java $name < stdin.stdin"
diff --git a/lxc/executors/jelly b/lxc/executors/jelly
index 4107b6b..32b79d9 100755
--- a/lxc/executors/jelly
+++ b/lxc/executors/jelly
@@ -1,2 +1,2 @@
 cd /tmp/$2
-runuser runner$1 -c "cd /tmp/$2 ; cat args.args | xargs -d '\n' timeout -s KILL 3 jelly fu code.code"
+runuser runner$1 -c "cd /tmp/$2 ; cat args.args | xargs -d '\n' timeout -s KILL 3 jelly fu code.code < stdin.stdin"
diff --git a/lxc/executors/julia b/lxc/executors/julia
index 7dddb24..3eeb323 100755
--- a/lxc/executors/julia
+++ b/lxc/executors/julia
@@ -1,2 +1,2 @@
 cd /tmp/$2
-runuser runner$1 -c "cd /tmp/$2 ; cat args.args | xargs -d '\n' timeout -s KILL 3 julia code.code"
+runuser runner$1 -c "cd /tmp/$2 ; cat args.args | xargs -d '\n' timeout -s KILL 3 julia code.code < stdin.stdin"
diff --git a/lxc/executors/kotlin b/lxc/executors/kotlin
index 5d5070a..6c034e6 100755
--- a/lxc/executors/kotlin
+++ b/lxc/executors/kotlin
@@ -3,4 +3,4 @@ cp code.code code.kt
 runuser runner$1 -c "\
     cd /tmp/$2 ; \
     kotlinc code.kt -include-runtime -d code.jar ; \
-    cat args.args | xargs -d '\n' timeout -s KILL 3 java -jar code.jar"
+    cat args.args | xargs -d '\n' timeout -s KILL 3 java -jar code.jar < stdin.stdin"
diff --git a/lxc/executors/lua b/lxc/executors/lua
index b412013..a5ab76f 100755
--- a/lxc/executors/lua
+++ b/lxc/executors/lua
@@ -1,2 +1,2 @@
 cd /tmp/$2
-runuser runner$1 -c "cd /tmp/$2 ; cat args.args | xargs -d '\n' timeout -s KILL 3 lua code.code"
+runuser runner$1 -c "cd /tmp/$2 ; cat args.args | xargs -d '\n' timeout -s KILL 3 lua code.code < stdin.stdin"
diff --git a/lxc/executors/nasm b/lxc/executors/nasm
index 22026af..45e1d1c 100755
--- a/lxc/executors/nasm
+++ b/lxc/executors/nasm
@@ -2,4 +2,4 @@ runuser runner$1 -c "\
     cd /tmp/$2 ; \
     nasm -f elf32 -o binary.o code.code ; \
     ld -m elf_i386 binary.o -o binary ; \
-    cat args.args | xargs -d '\n' timeout -s KILL 3 ./binary"
+    cat args.args | xargs -d '\n' timeout -s KILL 3 ./binary < stdin.stdin"
diff --git a/lxc/executors/nasm64 b/lxc/executors/nasm64
index a6dc197..d498a54 100755
--- a/lxc/executors/nasm64
+++ b/lxc/executors/nasm64
@@ -2,4 +2,4 @@ runuser runner$1 -c "\
     cd /tmp/$2 ; \
     nasm -f elf64 -o binary.o code.code ; \
     ld -m elf_x86_64 binary.o -o binary ; \
-    cat args.args | xargs -d '\n' timeout -s KILL 3 ./binary"
+    cat args.args | xargs -d '\n' timeout -s KILL 3 ./binary < stdin.stdin"
diff --git a/lxc/executors/node b/lxc/executors/node
index 5fd7d26..04113d2 100755
--- a/lxc/executors/node
+++ b/lxc/executors/node
@@ -1,7 +1,7 @@
 cd /tmp/$2
 
 if [[ -z $(grep '[^[:space:]]' args.args) ]]; then
-    runuser runner$1 -c "cd /tmp/$2 ; timeout -s KILL 3 node code.code"
+    runuser runner$1 -c "cd /tmp/$2 ; timeout -s KILL 3 node code.code < stdin.stdin"
 else
-    runuser runner$1 -c "cd /tmp/$2 ; cat args.args | xargs -d '\n' timeout -s KILL 3 node code.code"
+    runuser runner$1 -c "cd /tmp/$2 ; cat args.args | xargs -d '\n' timeout -s KILL 3 node code.code < stdin.stdin"
 fi
diff --git a/lxc/executors/perl b/lxc/executors/perl
index afb8ad5..9951e18 100755
--- a/lxc/executors/perl
+++ b/lxc/executors/perl
@@ -1,2 +1,2 @@
 cd /tmp/$2
-runuser runner$1 -c "cd /tmp/$2 ; cat args.args | xargs -d '\n' timeout -s KILL 3 perl code.code"
+runuser runner$1 -c "cd /tmp/$2 ; cat args.args | xargs -d '\n' timeout -s KILL 3 perl code.code < stdin.stdin"
diff --git a/lxc/executors/php b/lxc/executors/php
index d88a8d2..470f494 100755
--- a/lxc/executors/php
+++ b/lxc/executors/php
@@ -1,2 +1,2 @@
 cd /tmp/$2
-runuser runner$1 -c "cd /tmp/$2 ; cat args.args | xargs -d '\n' timeout -s KILL 3 php code.code"
+runuser runner$1 -c "cd /tmp/$2 ; cat args.args | xargs -d '\n' timeout -s KILL 3 php code.code < stdin.stdin"
diff --git a/lxc/executors/python2 b/lxc/executors/python2
index d172f18..15b65de 100755
--- a/lxc/executors/python2
+++ b/lxc/executors/python2
@@ -1,2 +1,2 @@
 cd /tmp/$2
-runuser runner$1 -c "cd /tmp/$2 ; cat args.args | xargs -d '\n' timeout -s KILL 3 python code.code"
+runuser runner$1 -c "cd /tmp/$2 ; cat args.args | xargs -d '\n' timeout -s KILL 3 python code.code < stdin.stdin"
diff --git a/lxc/executors/python3 b/lxc/executors/python3
index 0749d88..a2bc47f 100755
--- a/lxc/executors/python3
+++ b/lxc/executors/python3
@@ -1,2 +1,2 @@
 cd /tmp/$2
-runuser runner$1 -c "cd /tmp/$2 ; cat args.args | xargs -d '\n' timeout -s KILL 3 python3.8 code.code"
+runuser runner$1 -c "cd /tmp/$2 ; cat args.args | xargs -d '\n' timeout -s KILL 3 python3.8 code.code < stdin.stdin"
diff --git a/lxc/executors/ruby b/lxc/executors/ruby
index 9de7477..5c5b181 100755
--- a/lxc/executors/ruby
+++ b/lxc/executors/ruby
@@ -1,2 +1,2 @@
 cd /tmp/$2
-runuser runner$1 -c "cd /tmp/$2 ; cat args.args | xargs -d '\n' timeout -s KILL 3 ruby code.code"
+runuser runner$1 -c "cd /tmp/$2 ; cat args.args | xargs -d '\n' timeout -s KILL 3 ruby code.code < stdin.stdin"
diff --git a/lxc/executors/rust b/lxc/executors/rust
index c939259..ad7d8e2 100755
--- a/lxc/executors/rust
+++ b/lxc/executors/rust
@@ -2,4 +2,4 @@ cd /tmp/$2
 rustc -o binary code.code
 runuser runner$1 -c "\
     cd /tmp/$2 ; \
-    cat args.args | xargs -d '\n' timeout -s KILL 3 ./binary"
+    cat args.args | xargs -d '\n' timeout -s KILL 3 ./binary < stdin.stdin"
diff --git a/lxc/executors/swift b/lxc/executors/swift
index 4b5d8a1..fd8eb9f 100755
--- a/lxc/executors/swift
+++ b/lxc/executors/swift
@@ -1,2 +1,2 @@
 cd /tmp/$2
-runuser runner$1 -c "cd /tmp/$2 ; cat args.args | xargs -d '\n' timeout -s KILL 3 swift code.code"
+runuser runner$1 -c "cd /tmp/$2 ; cat args.args | xargs -d '\n' timeout -s KILL 3 swift code.code < stdin.stdin"
diff --git a/lxc/executors/typescript b/lxc/executors/typescript
index 863d8d0..26adfba 100755
--- a/lxc/executors/typescript
+++ b/lxc/executors/typescript
@@ -4,4 +4,4 @@ runuser runner$1 -c "\
     tsc interim.ts ; \
     rm -f interim.ts ; \
     mv interim.js code.code ; \
-    cat args.args | xargs -d '\n' timeout -s KILL 3 node code.code"
+    cat args.args | xargs -d '\n' timeout -s KILL 3 node code.code < stdin.stdin"
diff --git a/shared/execute.js b/shared/execute.js
index ed612bf..fbfd5de 100644
--- a/shared/execute.js
+++ b/shared/execute.js
@@ -1,7 +1,7 @@
 const { writeFile } = require('fs/promises');
 const { spawn } = require('child_process');
 
-function execute(language, source, args) {
+function execute(language, source, args, stdin) {
     return new Promise(async resolve => {
         const stamp = new Date().getTime();
         const sourceFile = `/tmp/${stamp}.code`;
@@ -11,6 +11,7 @@ function execute(language, source, args) {
         const process = spawn(__dirname + '/../lxc/execute', [
             language.name,
             sourceFile,
+            stdin ?? '',
             args?.join('\n') ?? '',
         ]);