.onnx QA Fixtures AI & Model Weights CC0 Public Domain · CI/CD Safe

Sample .onnx (ONNX) Test Files & Edge Cases

Deterministic ONNX (Open Neural Network Exchange) fixtures engineered for automated unit tests, parser fuzzing, and upload validation pipelines. Pull directly in GitHub Actions with immutable SHA-256 verification.

minimalexpect: valid

minimal-linear.onnx

Real ONNX ModelProto (ir_version=9, opset=21) verified by onnx.checker.check_model — MatMul + Relu.

↓ Download (319 B)

SHA-256: aa4e82d69b4579c1a7bfbf12228776f121238825abb64a45e937d4e1299a33fb

Exact: 319 bytes

curl -fsSL https://fileformat.co/fixtures/v1/onnx/minimal-linear.onnx -o minimal-linear.onnx \
  && echo "aa4e82d69b4579c1a7bfbf12228776f121238825abb64a45e937d4e1299a33fb  minimal-linear.onnx" | shasum -a 256 -c

realisticexpect: valid

mlp-classifier.onnx

onnx.helper-built MLP with float32 TensorProto initializers, Gelu activation — passes onnx.checker.

↓ Download (702 B)

SHA-256: bc52092748c786119aa203b36f61a706a5f40a426b9626ed0469552d9566ff4e

Exact: 702 bytes

curl -fsSL https://fileformat.co/fixtures/v1/onnx/mlp-classifier.onnx -o mlp-classifier.onnx \
  && echo "bc52092748c786119aa203b36f61a706a5f40a426b9626ed0469552d9566ff4e  mlp-classifier.onnx" | shasum -a 256 -c

edge-caseTruncated Protobuf Frameexpect: parser_error

truncated-protobuf.onnx

ModelProto wire frame truncated mid-GraphProto — ModelProto.ParseFromString must raise DecodeError.

↓ Download (56 B)

SHA-256: d4db86720670b6fb423cba89dae6fd0d3dc7a92624f836148e6fc29a590b06f4

Exact: 56 bytes

curl -fsSL https://fileformat.co/fixtures/v1/onnx/truncated-protobuf.onnx -o truncated-protobuf.onnx \
  && echo "d4db86720670b6fb423cba89dae6fd0d3dc7a92624f836148e6fc29a590b06f4  truncated-protobuf.onnx" | shasum -a 256 -c

Safe-by-Design Client-Side Synthesizer

In-Browser Edge-Case & Malformed Fixture Mutator

Zero Upload · Generated in RAM

Need negative test fixtures for parser fuzzing or upload gateway validation? Mutate minimal-linear.onnx directly in your browser without hosting unsafe payloads on public URLs.

1. Base Input Source

Default Fixture: minimal-linear.onnx

2. Select Mutation Operator

Tests graceful EOF / footer corruption handling without process panic or OOM.