What Gerber formats does this support?

RS-274X (extended Gerber) and Gerber X2 attributes. Excellon and XNC drill files are auto-detected. Older RS-274D (no embedded apertures) is not supported.

What archive formats can I drop?

.zip, .tar, .tar.gz, and .tgz. Loose .gbr / .drl / .gtl / .gbl files are also accepted.

Can it open ODB++ or IPC-2581?

Not yet. Gerber RS-274X / X2 plus Excellon are the MVP. ODB++ and IPC-2581 are on the roadmap.

How accurate are the measurements?

Distances are computed in the file's native coordinate system (typically millimeters at 0.1 µm resolution). Pad-center snap is geometric (centroid of the aperture flash).

Is Gerber a trademark?

Yes — Gerber is a registered trademark of Ucamco NV. Loft Tools is an independent third-party viewer and is not affiliated with or endorsed by Ucamco.

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Drop a ZIP, TAR, or loose Gerber files. Layer toggles, snap-to-pad measurement, 3D mode, diff — every feature, free.

.zip
.tar
.tgz
.gbr
.drl

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