Browser Compatibility

DirectML Backend / Windows

WebNN	CPU	GPU	NPU
Windows	✅ LiteRT/XNNPACK 🚀ℹ️ WCR/MLAS (deprecated)	✅ DirectML	✅ DirectML

The WebNN DirectML backend mainly supported on Windows.

WebNN Spec	Operations	Chromium Version
argMax	✅ REDUCE_FUNCTION_ARGMAX	M122
argMin	✅ REDUCE_FUNCTION_ARGMIN	M122
batchNormalization	✅ BATCH_NORMALIZATION	M122
cast	✅ CAST	M122
clamp	✅ ELEMENT_WISE_CLIP	M119
concat	✅ JOIN	M120
conv2d	✅ CONVOLUTION	M119
convTranspose2d	✅ CONVOLUTION	M121
cumulativeSum	✅ CUMULATIVE_SUMMATION	M131
dequantizeLinear	✅ ELEMENT_WISE_DEQUANTIZE_LINEAR	M132
element-wise binary / add	✅ ELEMENT_WISE_ADD	M119
element-wise binary / div	✅ ELEMENT_WISE_DIVIDE	M119
element-wise binary / max	✅ ELEMENT_WISE_MAX	M119
element-wise binary / min	✅ ELEMENT_WISE_MIN	M119
element-wise binary / mul	✅ ELEMENT_WISE_MULTIPLY	M119
element-wise binary / notEqual	✅ Emulated with ELEMENT_WISE_LOGICAL_EQUALS and ELEMENT_WISE_LOGICAL_NOT	M134
element-wise binary / pow	✅ ELEMENT_WISE_POW	M119
element-wise binary / sub	✅ ELEMENT_WISE_SUBTRACT	M119
element-wise logical / equal	✅ ELEMENT_WISE_LOGICAL_EQUALS	M122
element-wise logical / greater	✅ ELEMENT_WISE_LOGICAL_GREATER_THAN	M122
element-wise logical / greaterOrEqual	✅ ELEMENT_WISE_LOGICAL_GREATER_THAN_OR_EQUAL	M122
element-wise logical / lesser	✅ ELEMENT_WISE_LOGICAL_LESS_THAN	M122
element-wise logical / lesserOrEqual	✅ ELEMENT_WISE_LOGICAL_LESS_THAN_OR_EQUAL	M122
element-wise logical / logicalAnd	✅ ELEMENT_WISE_LOGICAL_AND	M131
element-wise logical / logicalOr	✅ ELEMENT_WISE_LOGICAL_OR	M131
element-wise logical / logicalXor	✅ ELEMENT_WISE_LOGICAL_XOR	M131
element-wise logical / not	✅ ELEMENT_WISE_LOGICAL_NOT	M121
element-wise unary / abs	✅ ELEMENT_WISE_ABS	M121
element-wise unary / ceil	✅ ELEMENT_WISE_CEIL	M121
element-wise unary / identity	✅ ELEMENT_WISE_IDENTITY	M121
element-wise unary / cos	✅ ELEMENT_WISE_COS	M121
element-wise unary / erf	✅ ELEMENT_WISE_ERF	M121
element-wise unary / exp	✅ ELEMENT_WISE_EXP	M121
element-wise unary / floor	✅ ELEMENT_WISE_FLOOR	M121
element-wise unary / log	✅ ELEMENT_WISE_LOG	M121
element-wise unary / neg	✅ ELEMENT_WISE_NEGATE	M121
element-wise unary / reciprocal	✅ ELEMENT_WISE_RECIP	M121
element-wise unary / sin	✅ ELEMENT_WISE_SIN	M121
element-wise unary / sqrt	✅ ELEMENT_WISE_SQRT	M121
element-wise unary / tan	✅ ELEMENT_WISE_TAN	M121
elu	✅ ACTIVATION_ELU	M121
expand	✅ ELEMENT_WISE_IDENTITY	M121
gather	✅ GATHER	M122
gatherElements	✅ GATHER_ELEMENTS	M130
gatherND	✅ GATHER_ND	M131
gelu	✅ ACTIVATION_GELU	M126
gemm	✅ GEMM	M119
gru	✅ GRU	M125
gruCell	✅ GRU	M125
hardSigmoid	✅ ACTIVATION_HARD_SIGMOID	M123
hardSwish	✅ Map to other op	M123
instanceNormalization	✅ MEAN_VARIANCE_NORMALIZATION1	M122
layerNormalization	✅ MEAN_VARIANCE_NORMALIZATION1	M122
leakyRelu	✅ ACTIVATION_LEAKY_RELU	M121
linear	✅ ACTIVATION_LINEAR	M122
lstm	✅ LSTM	M125
lstmCell	✅ LSTM	M125
matmul	✅ GEMM	M121
pad	✅ PADDING	M120
pooling / averagePool2d	✅ AVERAGE_POOLING	M119
pooling / l2Pool2d	✅ LP_POOLING	M123
pooling / maxPool2d	✅ MAX_POOLING2	M119
prelu	✅ ACTIVATION_PARAMETERIZED_RELU	M120
quantizeLinear	✅ ELEMENT_WISE_QUANTIZE_LINEAR	M132
reduction / reduceL1	✅ REDUCE_FUNCTION_L1	M121
reduction / reduceL2	✅ REDUCE_FUNCTION_L2	M121
reduction / reduceLogSum	✅ REDUCE_FUNCTION_LOG_SUM	M121
reduction / reduceLogSumExp	✅ REDUCE_FUNCTION_LOG_SUM_EXP	M121
reduction / reduceMax	✅ REDUCE_FUNCTION_MAX	M121
reduction / reduceMean	✅ REDUCE_FUNCTION_AVERAGE	M121
reduction / reduceMin	✅ REDUCE_FUNCTION_MIN	M121
reduction / reduceProduct	✅ REDUCE_FUNCTION_MULTIPLY	M121
reduction / reduceSum	✅ REDUCE_FUNCTION_SUM	M121
reduction / reduceSumSquare	✅ REDUCE_FUNCTION_SUM_SQUARE	M121
relu	✅ ACTIVATION_RELU	M119
resample2d	✅ RESAMPLE	M121
reshape	✅ Supported by tensor strides	M119
reverse	✅ SLICE1	M133
scatterElements	✅ SCATTER_ELEMENTS	M132
scatterND	✅ SCATTER_ND	M131
sigmoid	✅ ACTIVATION_SIGMOID	M121
sign	✅ ELEMENT_WISE_SIGN	M130
slice	✅ SLICE	M120
softmax	✅ ACTIVATION_SOFTMAX	M119
softplus	✅ ACTIVATION_SOFTPLUS	M122
softsign	✅ ACTIVATION_SOFTSIGN	M123
split	✅ SPLIT	M120
tanh	✅ ACTIVATION_TANH	M121
tile	✅ TILE	M130
transpose	✅ Supported by tensor strides	M120
triangular	✅ Supported by combined operations	M126
where	✅ ELEMENT_WISE_IF	M122

Browser Compatibility

DirectML Backend / Windows

See Also