All JWST data products are archived in the Mikulski Archive for Space Telescopes (MAST) and can be searched and explored via the MAST Discovery Portal. Authorized users may visualize and retrieve queried data.


Data from all JWST instruments: MIRINIRCamNIRSpecNIRSS, and FGS, are archived in the Mikulski Archive for Space Telescopes (MAST). The data products include raw exposures and all levels of calibration processing, contemporaneous engineering and calibration reference data, and in some cases high-level science products contributed by investigating teams. All JWST data products can be searched via the MAST Discovery Portal, or through various community applications and software interfaces. Authorized users may visualize and retrieve queried data.

The JWST data archive: MAST

Data from all JWST instruments are archived in MAST, which is the permanent repository and access portal for data from many NASA UV/optical/IR missions and selected ground-based surveys. Users may discover particular JWST data in a variety of ways, including searches by:

  • the observing program in which they were obtained
  • the instrument used to obtain the data
  • sky coordinates
  • astrophysical source name

MAST Discovery Portal users can find all varieties of JWST data products along with co-spatial products from any other hosted mission archive. Authorized users may explore the JWST science data products, overlay science datasets from other missions and surveys, as well as browse the contemporaneous engineering data, calibration data, and data quality summaries. Authorized users may also retrieve JWST data products via the MAST web interface or through user-written scripts by calling the MAST Application Programming Interface (API).

The following sections describe the means to discover, explore, and retrieve JWST data products, and to obtain user support.




MAST API User Guide

Data Use Policy

MAST Discovery Portal User Guide

JWST technical documents

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Last updated

Published July 11, 2017


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Published March 2, 2017