FindRomCover scans the ROM folder for files whose extension is in the supported-extensions list. The default list covers cartridge, disk, tape, and archive formats from most retro platforms.

1. Open Settings > Edit Supported Extensions....
2. Add an extension (without the dot) and press Enter or click Add.
3. Remove an extension by selecting it and clicking Remove.
4. Click Save.

Extensions are normalized to lower case and sorted alphabetically. Changing the list triggers an immediate re-scan so the missing covers list stays accurate.

2hd, 3ds, 7z, 88d, a78, arc, bat, bin, bs, cas, ccd, cdi, cdt, chd, cht,
ciso, cmd, col, cpr, cso, cue, cv, d64, d71, d81, d88, dim, dol, dsk, dup,
dummy, elf, exe, fdi, fds, fig, g64, gb, gcm, gcz, gdi, gg, gz, hdf, hdm,
img, int, ipf, iso, lnk, lnx, m3u, mdf, mds, ms1, msa, mx1, mx2, n64, nbz,
nca, ndd, nds, nes, nib, nrg, nro, nso, nsp, o, pbp, pce, prg, prx, rar, ri,
rom, rvz, sc, scl, sda, sf, sfc, sfx, sg, smc, sms, sna, st, stx, swc, t64,
tap, tgc, toc, trd, tzx, u1, unf, unif, url, v64, voc, wad, wbfs, wua, xci,
xdf, z64, z80, zip, zso, gba, gbc, snes, md, smd, gen, 32x, sgg

Tip: Add console-specific extensions you use, such as adf, xex, atr, or d64, to catch formats that are not in the default list.

• Extensions are compared case-insensitively, so .ZIP matches zip.
• Subfolders are scanned recursively.
• A ROM is considered covered when an image with the same base name exists in the image folder, regardless of the image extension.
• Files with extensions outside the list are ignored entirely.

• Folders & Scanning
• File Formats
• Missing Covers List