RomDetective
Runs locally · no uploads

RomDetective

ROM Identification Service

Identify arcade ROMs through CRC32, SHA-1 and the MAME database. Unknown dumps are automatically analyzed for common bootleg transformations, scrambling and split ROM layouts.

SUPPORTED ROM TYPES

P 68KS FIXC GFXM Z80V ADPCM

What can RomDetective do?

MAME Identification

RomDetective can identify arcade ROMs using CRC32 and SHA-1 against the MAME database.

Bootleg Analysis

Automatically recognizes many bootleg ROMs by applying supported classic transformations, including byte swap, nibble swap, data-line swap, address-line swap, and common ROM layout transformations.

Archives and Results

  • Detects partial matches or split ROMs and shows the percentage of identified coverage.
  • Analyzes multiple ZIP archives while keeping the results of each archive separate.
  • Calculates MAME Candidate Sets independently for each archive.
  • Shows ROM region/type when available, such as CPU, graphics, Z80/audio, and ADPCM.
  • Shows file size, CRC32, SHA-1, MAME ROM name, and transformations used.
  • Automatically runs bootleg analysis when a ROM is not identified directly.

ROMs are analyzed locally in your browser and are never uploaded to the server.

Bootleg analysis is automatic but intentionally limited to the supported transformations. A "not identified" result does not necessarily mean the dump does not belong to a known game.

Drop your ROMs here

ZIP archives or files with any extension, including 10.8a and 11.9a

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Bootleg ROM Analyzer runs automatically when direct identification fails. It tries classic data/address swaps and ROM layouts. Up to 2 steps and 5,000 checks per ROM; 32 MB per input and 64 MB retained per batch. The search is bounded, not exhaustive.

DB

MAME MATCHES

Waiting for ROMs

Identification by file hashes

—
0ROM
0 BTOTAL SIZE
0UNIDENTIFIED
ROM fileRoleRegionSizeCRC32Status

ROM data and full hashes stay in your browser. Only database indexes are downloaded from this site. Source: Official MAME XML. Includes systems, devices and BIOS metadata; excludes separate software lists and CHD contents. Limits: 32 MiB per ROM, 256 MiB per ZIP, 512 MiB per upload, 1 GiB uncompressed per upload.

A ROM may belong to multiple sets or clones. Its role is interpreted from the MAME region; unclear roles are marked for interpretation. “Not in database” does not necessarily mean the ROM is faulty.