.png QA Fixtures Modern Media & Spatial 3D CC0 Public Domain · CI/CD Safe

Sample .png (PNG) Test Files & Edge Cases

Deterministic Portable Network Graphics (PNG) 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-2x2-rgba.png

Real 8-bit RGBA PNG encoded by Pillow with valid CRC32 checksums on every chunk.

↓ Download (83 B)

SHA-256: 275f56b84188ce563dfa9364ba7d2b3dfec7beb5d62de11bddcafb0390e85752

Exact: 83 bytes

curl -fsSL https://fileformat.co/fixtures/v1/png/minimal-2x2-rgba.png -o minimal-2x2-rgba.png \
  && echo "275f56b84188ce563dfa9364ba7d2b3dfec7beb5d62de11bddcafb0390e85752  minimal-2x2-rgba.png" | shasum -a 256 -c

realisticexpect: valid

ai-prompt-metadata.png

16×16 RGBA PNG from Pillow containing AI generation prompt metadata inside a standard tEXt chunk.

↓ Download (305 B)

SHA-256: 1c159eb8d483c4379933d83bac5ba8581b50e5651f9877c059e999cc102840de

Exact: 305 bytes

curl -fsSL https://fileformat.co/fixtures/v1/png/ai-prompt-metadata.png -o ai-prompt-metadata.png \
  && echo "1c159eb8d483c4379933d83bac5ba8581b50e5651f9877c059e999cc102840de  ai-prompt-metadata.png" | shasum -a 256 -c

edge-caseTruncated IDAT Payloadexpect: parser_error

truncated-idat.png

Real Pillow PNG truncated inside the compressed IDAT payload — decode must fail (missing IEND alone would still decode).

↓ Download (47 B)

SHA-256: ac4cc6aeb4c37baeee650f26c1651411aaade073ecee5db776d40defcac6e53a

Exact: 47 bytes

curl -fsSL https://fileformat.co/fixtures/v1/png/truncated-idat.png -o truncated-idat.png \
  && echo "ac4cc6aeb4c37baeee650f26c1651411aaade073ecee5db776d40defcac6e53a  truncated-idat.png" | 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-2x2-rgba.png directly in your browser without hosting unsafe payloads on public URLs.

1. Base Input Source

Default Fixture: minimal-2x2-rgba.png

2. Select Mutation Operator

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