Tiny, copyright-free, PII-free collision PoCs

MD5

FastColl

GZip archives md5-1.gz / md5-2.gz
JPG images
- via UniColl md5-1.jpg / md5-2.jpg
- via modified FastColl md5-1fc.jpg / md5-2fc.jpg
PDF documents md5-1.pdf / md5-2.pdf
PNG images
- generic header, not 100% compatible
  - appended data md5-1.png / md5-2.png
  - appended data w/ correct CRCs md5-crc1.png / md5-crc2.png
  - synchronized comments md5-sync1.png / md5-sync2.png
- specific header w/ common dimensions/colorspace md5-s1.png / md5-s2.png
MP4
- generic header, 32b length (LTV) md5-1.mp4 / md5-2.mp4
- generic header, 64b length (TLV) md5-l1.mp4 / md5-l2.mp4
- specific header md5-s1.mp4 / md5-s2.mp4
ZIP md5-1.zip / md5-2.zip
LZ4 archives md5-1.lz4 / md5-2.lz4
Zstandard archives md5-1.zstd / md5-2.zstd
LZ4/Zstandard archives md5-c6a611ce.zstd / md5-c6a611ce.lz4
Wasm executables md5-1.wasm / md5-2.wasm

ZIP-based formats:

Office Open XML
- DOCX md5-1.docx / md5-2.docx
- PPTX md5-1.pptx / md5-2.pptx
- XLSX md5-1.xls / md5-2.xls
Open Container Format
- EPUB md5-1.epub / md5-2.epub
Open Packaging Conventions
- XPS md5-1.xps / md5-2.xps
- 3MF md5-1.3mf / md5-2.3mf