Browser Compatibility

LiteRT Backend / chromeOS, Linux, Windows and Android

WebNN	CPU	GPU	NPU
chromsOS	✅ LiteRT/XNNPACK	🚀ℹ️ LiteRT To do, temporarily fallback to XNNPACK	🚀ℹ️ LiteRT To do, temporarily fallback to XNNPACK
Linux	✅ LiteRT/XNNPACK	🚀ℹ️ LiteRT To do, temporarily fallback to XNNPACK	🚀ℹ️ LiteRT To do, temporarily fallback to XNNPACK
Windows	✅ LiteRT/XNNPACK 🚀ℹ️ WCR/MLAS (deprecated)	✅ DirectML	✅ DirectML
Android	✅ LiteRT/XNNPACK	🚀ℹ️ LiteRT To do, temporarily fallback to XNNPACK	🚀ℹ️ LiteRT To do, temporarily fallback to XNNPACK

The WebNN LiteRT backend mainly supported on ChromeOS, Linux, Windows and Android.

WebNN Spec	Operations	Chromium Version
argMax	✅ ARG_MAX	M126
argMin	✅ ARG_MIN	M126
batchNormalization	✅ Emulated with Scale * ((Input - Mean) / sqrt(Variance + Epsilon)) + Bias	M127
cast	✅ CAST	M126
clamp	✅ RELU_N1_TO_1 ✅ RELU6 ✅ RELU	M112
concat	✅ CONCATENATION	M113
conv2d	✅ CONV_2D ✅ DEPTHWISE_CONV_2D	M112
convTranspose2d	✅ TRANSPOSE_CONV	M128
cumulativeSum	✅ CUMSUM	M132
dequantizeLinear	✅ QUANTIZE	M132
element-wise binary / add	✅ ADD	M112
element-wise binary / div	✅ DIV	M112
element-wise binary / max	✅ MAXIMUM	M112
element-wise binary / min	✅ MINIMUM	M112
element-wise binary / mul	✅ MUL	M112
element-wise binary / notEqual	✅ NotEqual	M134
element-wise binary / pow	✅ POW	M122
element-wise binary / sub	✅ SUB	M112
element-wise logical / equal	✅ EQUAL	M126
element-wise logical / greater	✅ GREATER	M126
element-wise logical / greaterOrEqual	✅ GREATER_EQUAL	M126
element-wise logical / lesser	✅ LESS	M126
element-wise logical / lesserOrEqual	✅ LESS_EQUAL	M126
element-wise logical / logicalAnd	✅ LOGICAL_AND	M132
element-wise logical / logicalOr	✅ LOGICAL_OR	M132
element-wise logical / logicalXor	✅ NOT_EQUAL	M132
element-wise logical / not	✅ LOGICAL_NOT	M126
element-wise unary / abs	✅ ABS	M116
element-wise unary / ceil	✅ CEIL	M116
element-wise unary / identity	✅ RESHAPE	M126
element-wise unary / cos	✅ COS	M123
element-wise unary / erf	✅ SIGN	M128
element-wise unary / exp	✅ EXP	M123
element-wise unary / floor	✅ FLOOR	M116
element-wise unary / log	✅ LOG	M123
element-wise unary / neg	✅ NEG	M116
element-wise unary / reciprocal	✅ Emulated with 1/x	M127
element-wise unary / sin	✅ SIN	M123
element-wise unary / sqrt	✅ SQRT	M122
elu	✅ ELU	M115
expand	✅ BROADCAST_TO	M128
gather	✅ GATHER	M126
gatherElements	✅ Emulated with GATHER_ND	M133
gatherND	✅ GATHER_ND	M132
gelu	✅ GELU	M128
gemm	✅ FULLY_CONNECTED	M112
gru	✅ Emulated	M129
gruCell	✅ Emulated	M129
hardSigmoid	✅ Emulated with y = max(0, min(1, alpha * // x + beta))	M126
hardSwish	✅ HARD_SWISH	M112
instanceNormalization	✅ Emulated with Scale * ((Input - Mean) / sqrt(Variance + Epsilon)) + Bias	M127
layerNormalization	✅ Emulated	M127
leakyRelu	✅ LEAKY_RELU	M113
linear	✅ Emulated with alpha * x + beta	M126
lstm	✅ Emulated	M129
lstmCell	✅ Emulated	M129
matmul	✅ BATCH_MATMUL	M126
pad	✅ PAD	M114
pooling / averagePool2d	✅ AVERAGE_POOL_2D	M112
pooling / l2Pool2d	🚀 L2_POOL_2D
pooling / maxPool2d	✅ MAX_POOL_2D	M112
prelu	✅ PRELU	M115
quantizeLinear	✅ QUANTIZE	M132
reduction / reduceL1	✅ Emulated with adding abs operation before reduceSum	M128
reduction / reduceL2	✅ Emulated with appending pow(x, 0.5) after reduceSumSquare	M128
reduction / reduceLogSum	✅ Emulated with log and reduceSum	M127
reduction / reduceLogSumExp	✅ Emulated with log, reduceSum and exp	M127
reduction / reduceMax	✅ REDUCE_MAX	M126
reduction / reduceMean	✅ MEAN	M120
reduction / reduceMin	✅ REDUCE_MIN	M126
reduction / reduceProduct	✅ REDUCE_PROD	M126
reduction / reduceSum	✅ SUM	M126
reduction / reduceSumSquare	✅ Emulated with reduceSum and square	M127
relu	✅ RELU	M112
resample2d	✅ RESIZE_BILINEAR ✅ RESIZE_NEAREST_NEIGHBOR	M112
reshape	✅ RESHAPE	M112
reverse	✅ REVERSE	M133
scatterElements	✅ Emulated with SCATTER_ND and WHERE	M133
scatterND	✅ SCATTER_ND	M132
sigmoid	✅ LOGISTIC	M112
sign	✅ SIGN	M130
slice	✅ SLICE	M116
softmax	✅ SOFTMAX	M112
softplus	✅ Emulated with ln(1 + exp(x))	M126
softsign	✅ Emulated with x / (1 + \|x\|)	M127
split	✅ SPLIT_V	M116
tanh	✅ TANH	M116
tile	✅ TILE	M131
transpose	✅ TRANSPOSE	M113
triangular	✅ Emulated	M128
where	✅ SELECT_V2	M126