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File Conversion

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Client-side decoding (no server required)

Relay decodes the vast majority of scientific image formats directly in the browser using WebAssembly — no BioFormats server, no conversion step, and no round-trip to a backend. This covers 95%+ of scientific image file types including TIFF, OME-TIFF, CZI, ND2, LIF, DICOM, FITS, and more. Most web-based scientific viewers require a server-side rendering pipeline (typically BioFormats or similar) to convert proprietary formats before they can be displayed. Relay skips this entirely — files open instantly in the browser.

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Supported client-side formats

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Optional export conversion

While viewing is fully client-side, Relay also supports exporting files to open standards when needed (e.g., for sharing or archival):

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Metadata extraction

On upload, Relay automatically extracts metadata from your files: