What is a .GBL file?
GBL is the Gerber file for a circuit board’s bottom copper layer.
- Did you know
- Each PCB layer gets its own Gerber file when sent off for fabrication.
- In the Protel naming scheme a .gbl is the Gerber Bottom copper Layer, the “G”, “B” and “L” spelling out its role.
- That Protel extension convention became the de facto standard most board fabricators expect.
- 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
- .GBL 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 .GBL file
- Drag a .GBL 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.