Convert GBR to BMP
Convert GBR to BMP online: the PCB layer artwork drawn at 300 dpi in sharp detail, saved as an uncompressed BMP bitmap. Free, no sign-up.
Drop your GBR files here
Up to 50MB per file.
Conversion Settings
Files are encrypted and auto-deleted after conversion
How to Convert
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Upload your GBR files
Drag and drop or select GBR files from your device. You can upload multiple files at once.
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Configure Output
Choose any available BMP output options, then start the conversion.
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Download BMP files
Once conversion finishes, download your files individually or as a compressed ZIP archive.
Why convert GBR to BMP?
GBR is the Extended Gerber (RS-274X) format that PCB design tools export for each board layer, such as copper, solder mask, silkscreen and board outline. The layer's pads, tracks, fills and outlines are drawn in teal on a white background at 300 dpi, with anti-aliased edges.
BMP stores every pixel uncompressed, so the image is exact and simple to read by any software that handles Windows bitmaps.
Frequently Asked Questions
How do I convert GBR to BMP?
Drop your GBR file above and press Convert. Our servers render the Gerber layer with gerbv at 300 dpi, producing an anti-aliased PNG that is then encoded in the format you chose. The result is saved as an uncompressed BMP bitmap, ready to download.
What colours does the GBR layer use in the BMP?
The layer's artwork is drawn in teal (#007F73) on a plain white background, which keeps pads, tracks and copper pours clearly visible.
At what resolution is the GBR layer drawn for the BMP?
gerbv, the open-source Gerber viewer from the gEDA project, draws the layer at 300 dots per inch with anti-aliasing, so every inch of board becomes 300 pixels before the BMP is encoded.
How big is the BMP image from a GBR file?
The Gerber layer is drawn at 300 dpi, so the board's dimensions translate directly into pixels.
What kind of BMP does the GBR converter create?
A standard Windows bitmap with every pixel stored uncompressed, so the image is an exact copy of the rendered result.
Is my .gbr file kept private?
Your file is uploaded over an encrypted connection, converted on our servers and deleted automatically within 24 hours. We never read, share or keep your files, and no account is needed.