diff --git a/.github/workflows/fuzzers.yml b/.github/workflows/fuzzers.yml
new file mode 100644
index 00000000..b93e4a13
--- /dev/null
+++ b/.github/workflows/fuzzers.yml
@@ -0,0 +1,104 @@
+name: Run fuzzers on stored corpus and test it with valgrind
+
+# In the case of a pull request happening at the same time as a cron
+# job, there is a risk two jobs run at the same time. Therefore,
+# the corpus is only uploaded for the master branch. Pull requests will
+# fuzz for a short while, but the results are not uploaded.
+on:
+  push:
+  pull_request:
+  schedule:
+    - cron: 23 */8 * * *
+
+jobs:
+  build:    
+    runs-on: ubuntu-latest
+    env:
+      allfuzzers: parser dump
+    steps:
+    - name: Install packages necessary for building
+      run: |
+        sudo apt-get install --quiet ninja-build valgrind
+        wget https://apt.llvm.org/llvm.sh
+        chmod +x llvm.sh
+        sudo ./llvm.sh 8
+
+    - uses: actions/checkout@v1
+        # with:
+        # remove this once integrated
+        # ref: paul/fuzz_experiment
+    - name: Download the corpus from the last run
+      run: |
+        wget --quiet https://dl.bintray.com/pauldreik/simdjson-fuzz-corpus/corpus/corpus.tar
+        tar xf corpus.tar
+        rm corpus.tar
+    - name: List clang versions
+      run: |
+        ls /usr/bin/clang*
+        which clang++
+        clang++ --version
+    - name: Build all the variants
+      run: fuzz/build_fuzzer_variants.sh
+    - name: Run the fastest fuzzer to explore fast
+      run: |
+        for fuzzer in $allfuzzers; do
+          mkdir -p out/$fuzzer # in case this is a new fuzzer, or corpus.tar is broken
+          build-ossfuzz-fast8/fuzz/fuzz_$fuzzer         out/$fuzzer -max_total_time=30
+        done
+    - name: Run the other fuzzer variants for $fuzzer, with sanitizers etc
+      run: |
+        for fuzzer in $allfuzzers; do      
+          build-ossfuzz-withavx/fuzz/fuzz_$fuzzer       out/$fuzzer -max_total_time=20
+          build-ossfuzz-noavx/fuzz/fuzz_$fuzzer         out/$fuzzer -max_total_time=10
+          build-ossfuzz-noavx8/fuzz/fuzz_$fuzzer        out/$fuzzer -max_total_time=10
+          echo disable msan runs, it fails inside the fuzzing engine and not the fuzzed code!
+          echo build-ossfuzz-msan-noavx8/fuzz/fuzz_$fuzzer   out/$fuzzer -max_total_time=10 -reload=0
+          echo build-ossfuzz-msan-withavx8/fuzz/fuzz_$fuzzer out/$fuzzer -max_total_time=10 -reload=0
+          echo now have $(ls out/$fuzzer |wc -l) files in corpus        
+        done
+    - name: Minimize the corpus with the fast fuzzer
+      run: |
+        for fuzzer in $allfuzzers; do      
+          mkdir -p out/cmin/$fuzzer
+          build-ossfuzz-fast8/fuzz/fuzz_$fuzzer -merge=1  out/cmin/$fuzzer out/$fuzzer
+          rm -rf out/$fuzzer
+          mv out/cmin/$fuzzer out/$fuzzer
+        done
+    - name: Package the corpus into an artifact
+      run: |
+        for fuzzer in $allfuzzers; do      
+          tar rf corpus.tar out/$fuzzer
+        done
+    - name: Save the corpus as a github artifact
+      uses: actions/upload-artifact@v1
+      with:
+        name: corpus
+        path: corpus.tar
+    - name: Run the corpus through valgrind (normal build)
+      run: |
+        for fuzzer in $allfuzzers; do      
+          find out/$fuzzer -type f |sort|xargs valgrind build-plain-noavx/fuzz/fuzz_$fuzzer  2>&1|tee valgrind-$fuzzer-noavx.txt
+        done
+    - name: Run the corpus through valgrind (noavx build)
+      run: |
+        for fuzzer in $allfuzzers; do      
+          find out/$fuzzer -type f |sort|xargs valgrind build-plain-normal/fuzz/fuzz_$fuzzer 2>&1|tee valgrind-$fuzzer-normal.txt      
+        done  
+    - name: Compress the valgrind output
+      run: tar cf valgrind.tar valgrind-*.txt
+    - name: Save valgrind output as a github artifact
+      uses: actions/upload-artifact@v1
+      with:
+        name: valgrindresults
+        path: valgrind.tar
+    - name: Upload the corpus and results to bintray if we are on master
+      run: |
+        if [ $(git rev-parse --verify HEAD) = $(git rev-parse --verify origin/master) ] ; then
+          echo uploading each artifact twice, otherwise it will not be published
+          curl -T corpus.tar -upauldreik:${{ secrets.bintrayApiKey }} https://api.bintray.com/content/pauldreik/simdjson-fuzz-corpus/corpus/0/corpus/corpus.tar";publish=1;override=1"
+          curl -T corpus.tar -upauldreik:${{ secrets.bintrayApiKey }} https://api.bintray.com/content/pauldreik/simdjson-fuzz-corpus/corpus/0/corpus/corpus.tar";publish=1;override=1"
+          curl -T valgrind.tar -upauldreik:${{ secrets.bintrayApiKey }} https://api.bintray.com/content/pauldreik/simdjson-fuzz-corpus/corpus/0/corpus/valgrind.tar";publish=1;override=1"
+          curl -T valgrind.tar -upauldreik:${{ secrets.bintrayApiKey }} https://api.bintray.com/content/pauldreik/simdjson-fuzz-corpus/corpus/0/corpus/valgrind.tar";publish=1;override=1"
+        else
+          echo "not on master, won't upload to bintray"
+        fi
diff --git a/fuzz/build_fuzzer_variants.sh b/fuzz/build_fuzzer_variants.sh
new file mode 100755
index 00000000..59c42203
--- /dev/null
+++ b/fuzz/build_fuzzer_variants.sh
@@ -0,0 +1,151 @@
+#!/bin/sh
+#
+# This file builds multiple variants of the fuzzers
+# - different sanitizers
+# - different build options
+# - reproduce build, for running through valgrind
+
+# fail on error
+set -eu
+
+unset CXX CC CFLAGS CXXFLAGS LDFLAGS
+
+# A reproduce build, without avx but otherwise as plain
+# as it gets. No sanitizers or optimization.
+variant=plain-noavx
+if [ ! -d build-$variant ] ; then
+    mkdir build-$variant
+    cd build-$variant
+    
+    cmake .. \
+	  -GNinja \
+	  -DCMAKE_BUILD_TYPE=Debug \
+	  -DSIMDJSON_BUILD_STATIC=On \
+	  -DENABLE_FUZZING=On \
+	  -DSIMDJSON_FUZZ_LINKMAIN=On \
+	  -DSIMDJSON_DISABLE_AVX=On
+    
+    ninja
+    cd ..
+fi
+
+# A reproduce build as plain as it gets. Everythings tunable is
+# using the defaults.
+variant=plain-normal
+if [ ! -d build-$variant ] ; then
+    mkdir build-$variant
+    cd build-$variant
+    
+    cmake .. \
+	  -GNinja \
+	  -DCMAKE_BUILD_TYPE=Debug \
+	  -DSIMDJSON_BUILD_STATIC=On \
+	  -DENABLE_FUZZING=On \
+	  -DSIMDJSON_FUZZ_LINKMAIN=On
+    
+    ninja
+    cd ..
+fi
+
+# a fuzzer with sanitizers, built with avx disabled.
+variant=ossfuzz-noavx
+if [ ! -d build-$variant ] ; then
+    
+    export CC=clang
+    export CXX="clang++"
+    export CFLAGS="-fsanitize=fuzzer-no-link,address,undefined -fno-sanitize-recover=undefined -mno-avx2 -mno-avx "
+    export CXXFLAGS="-fsanitize=fuzzer-no-link,address,undefined -fno-sanitize-recover=undefined -mno-avx2 -mno-avx"
+    export LIB_FUZZING_ENGINE="-fsanitize=fuzzer"
+    
+    mkdir build-$variant
+    cd build-$variant
+    
+    cmake .. \
+	  -GNinja \
+	  -DCMAKE_BUILD_TYPE=Debug \
+	  -DSIMDJSON_BUILD_STATIC=On \
+	  -DENABLE_FUZZING=On \
+	  -DSIMDJSON_FUZZ_LINKMAIN=Off \
+	  -DSIMDJSON_FUZZ_LDFLAGS=$LIB_FUZZING_ENGINE \
+	  -DSIMDJSON_DISABLE_AVX=On
+    
+    ninja
+    cd ..
+fi
+
+
+# a fuzzer with sanitizers, built with avx disabled.
+variant=ossfuzz-noavx8
+if [ ! -d build-$variant ] ; then
+    
+    export CC=clang-8
+    export CXX="clang++-8"
+    export CFLAGS="-fsanitize=fuzzer-no-link,address,undefined -fno-sanitize-recover=undefined -mno-avx2 -mno-avx "
+    export CXXFLAGS="-fsanitize=fuzzer-no-link,address,undefined -fno-sanitize-recover=undefined -mno-avx2 -mno-avx"
+    export LIB_FUZZING_ENGINE="-fsanitize=fuzzer"
+    
+    mkdir build-$variant
+    cd build-$variant
+    
+    cmake .. \
+	  -GNinja \
+	  -DCMAKE_BUILD_TYPE=Debug \
+	  -DSIMDJSON_BUILD_STATIC=On \
+	  -DENABLE_FUZZING=On \
+	  -DSIMDJSON_FUZZ_LINKMAIN=Off \
+	  -DSIMDJSON_FUZZ_LDFLAGS=$LIB_FUZZING_ENGINE \
+	  -DSIMDJSON_DISABLE_AVX=On
+    
+    ninja
+    cd ..
+fi
+
+# a fuzzer with sanitizers, default built
+variant=ossfuzz-withavx
+if [ ! -d build-$variant ] ; then
+    
+    export CC=clang
+    export CXX="clang++"
+    export CFLAGS="-fsanitize=fuzzer-no-link,address,undefined -fno-sanitize-recover=undefined"
+    export CXXFLAGS="-fsanitize=fuzzer-no-link,address,undefined -fno-sanitize-recover=undefined"
+    export LIB_FUZZING_ENGINE="-fsanitize=fuzzer"
+    
+    mkdir build-$variant
+    cd build-$variant
+    
+    cmake .. \
+	  -GNinja \
+	  -DCMAKE_BUILD_TYPE=Debug \
+	  -DSIMDJSON_BUILD_STATIC=On \
+	  -DENABLE_FUZZING=On \
+	  -DSIMDJSON_FUZZ_LINKMAIN=Off \
+	  -DSIMDJSON_FUZZ_LDFLAGS=$LIB_FUZZING_ENGINE
+    
+    ninja
+    cd ..
+fi
+
+# a fast fuzzer, for fast exploration
+variant=ossfuzz-fast8
+if [ ! -d build-$variant ] ; then
+    export CC=clang-8
+    export CXX="clang++-8"
+    export CFLAGS="-fsanitize=fuzzer-no-link -O3 -g"
+    export CXXFLAGS="-fsanitize=fuzzer-no-link -O3 -g"
+    export LIB_FUZZING_ENGINE="-fsanitize=fuzzer"
+    
+    mkdir build-$variant
+    cd build-$variant
+    
+    cmake .. \
+	  -GNinja \
+	  -DCMAKE_BUILD_TYPE= \
+	  -DSIMDJSON_BUILD_STATIC=On \
+	  -DENABLE_FUZZING=On \
+	  -DSIMDJSON_FUZZ_LINKMAIN=Off \
+	  -DSIMDJSON_FUZZ_LDFLAGS=$LIB_FUZZING_ENGINE
+    
+    ninja
+    
+    cd ..
+fi