Gwyddion (software)

Gwyddion
Original authorsDavid Nečas (Yeti), Petr Klapetek
DeveloperCzech Metrology Institute
Initial release2 March 2004 (preview version 0.99.1).
Stable release
2.70  / 28 December 2025 (28 December 2025)
Preview release
3.7  / 7 January 2026 (7 January 2026)
Written inC
Operating systemCross-platform
Available inEnglish
TypeSPM Data Analysis Program
LicenseGPL (Free software)
Websitegwyddion.net
Repository

Gwyddion is a multiplatform modular free software for visualization and analysis of data from scanning probe microscopy (SPM) techniques (like AFM, MFM, STM, SNOM/NSOM). The project is led by its main developers David Nečas (Yeti) and Petr Klapetek who work together with various developers across the world. The software is made available as free software under the terms of the GNU General Public License. The name “Gwyddion” is that of a prominent god in Welsh Mythology (see Gwydion).

It is created for the analysis of height fields and other 2D (image) data. While it is primarily intended for data originating from scanning probe microscopy techniques (like AFM, MFM, STM, SNOM/NSOM), it may also be used for the analysis of profilometry data, for instance. Data is calculated and stored in the native file format (.gwy) in double precision.

Gwyddion supports many different file types and performs many image-based functions. Among others it can open and save the following graphics file formats:

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