What is a .GTL file?
GTL is the Gerber file for a circuit board’s top copper layer.
- Did you know
- Joseph Gerber, whose company gave the format its name, fled Nazi-occupied Vienna as a boy and built his first invention from the elastic waistband of his pyjamas.
- The Gerber format is named after Joseph Gerber, whose company built the photoplotters that first turned these files into circuit-board artwork.
- Extended Gerber (RS-274X), now stewarded by Ucamco, embeds all aperture definitions directly in each layer file so no separate table is needed.
- What Analyser reads
- Open scientific, medical and engineering files: DICOM scans, NIfTI brain volumes, Garmin FIT/TCX activities, FITS astronomy frames, FASTA/FASTQ sequences, chemistry structures (MOL/SDF/MOL2/CIF/XYZ), Gerber/Excellon PCB data, SPICE netlists, EDF/BDF biosignals, JCAMP-DX spectra, SPSS/Stata/SAS datasets and VTK/ParaView meshes - metadata extracted entirely in-browser.
- Depth of analysis
- .GTL is an identification-grade format: Analyser recognises it from its bytes and decodes the header metadata it carries, rather than opening it in a full viewer. Formats that do get a full viewer are marked "Full" on the formats page.
- Open a .GTL file
- Drag a .GTL file onto the Analyser home page (or tap to pick one). It is identified entirely in your browser - nothing is uploaded, there is no account, and it works offline once installed.