The graphical workbench for PHREEQC
Manage water samples, run PHREEQC models, fit parameters and plot the results in one application for Windows and macOS. PHREEQC is included, nothing else to install.
Version 6.1.0 · PHREEQC 3.8.8 · Windows x64 · macOS (Apple Silicon)
From input to figure
Your PHREEQC model, its data and its plots in one project
No more copying selected output between text editors and spreadsheets. The model tree keeps inputs, parameters, studies and plots connected.
PHREEQC basics · Parametric mixing · saturation index over temperature and mixing fraction
Import what you already have
Open existing .pqi inputs and thermodynamic databases as they are. GibbsStudio runs the original PHREEQC engine and keeps the original output.
Parameterize any value
Replace numbers in your input with parameters or mathematical expressions, then run every combination as one study.
Plots that follow your model
Selected output feeds tables and interactive 2D and 3D plots that update after every run. Export to SVG for your report.
Water chemistry
Field data and model results in the same figure
Import analyses from CSV or SQLite, check their charge balance, classify them by water type and irrigation suitability, and draw them on Piper, Schoeller and USSL diagrams. Then plot them next to your PHREEQC results to check the calibration by eye.
Plots
Interactive 2D and 3D plots, ready for your report
Every plot below was made in GibbsStudio from PHREEQC output or sample data, and exported as SVG.
Pricing
Start free. Upgrade when a project needs the Pro modules.
Community includes Akva and Phreeqc at no cost. Professional adds predominance, statistics, optimization and database tools.
Community
Everything you need to run PHREEQC and analyse water samples.
Free
- Akva and Phreeqc modules
- Data import, filters and mathematical expressions
- Interactive plots, export to SVG, HTML or images
- Parametric runs up to 100 cases
Professional
All six modules for calibration, uncertainty and predominance work.
21 €
per month, billed yearly, VAT not included
- Everything in Community
- Predominance, Statistics, Optimization and Database modules
- Unlimited parametric runs
- Technical support
Enterprise
For teams and organisations with several users or specific needs.
Custom
- Everything in Professional
- Licences for all company computers, volume pricing
- Perpetual licences on request
- Custom modules and training courses
Students get free temporary Professional licences, PhD students a discount. Compare editions
See it working
See GibbsStudio in action
A tour of the main window: the model tree, a PHREEQC study, and plots updating after each run.
More tutorials →Trusted in research and consulting
Used in peer-reviewed geochemistry
Research groups and consultancies use GibbsStudio for the calculations and figures in their publications.
Official partner: Amphos 21Amphos 21 commercializes GibbsStudio worldwide.Management of sorption data to support radioactive waste disposal
Brassinnes, S., López-García, M., Canals, I., Álvarez, S., Nardi, A., et al. · Geological Society, London, Special Publications 561(1), 115–132 · 2026
Colàs, E., Rodríguez-Mestres, J., Pérez, D., Mas, R., dos Santos, P.F., et al. · Applied Geochemistry 179, 106256 · 2025
Abu, A., Carrey, R., Navarro-Ciurana, D., Margalef-Martí, R., et al. · Water Resources Research 60(5) · 2024
Isotopic and geochemical modeling approach to evaluate abiotic nitrite reduction by ferrous iron
Abu, A., Carrey, R., Navarro-Ciurana, D., Margalef-Martí, R., Soler, A., Otero, N., Domènech, C. · Chemical Geology 647, 121942 · 2024
7 more publicationsShow fewer
The origin of groundwater salinity in the Matanza-Riachuelo aquifer system, Argentina
Armengol, S., Manzano, M., Ayora, C., Martínez, S. · Groundwater for Sustainable Development 20, 100879 · 2023
López-García, M., Madé, B., Valls, A., Robinet, J.-C., Duro, L., García, D. · Chemosphere 341, 140097 · 2023
Domènech, C., Villanova-de-Benavent, C., Proenza, J.A., Tauler, E., et al. · Minerals 12(8), 927 · 2022
The role of loess weathering in the groundwater chemistry of the Chaco-Pampean Plain (Argentina)
Armengol, S., Ayora, C., Manzano, M., Bea, S.A., Martínez, S. · Journal of Hydrology 587, 124984 · 2020
Coffinite formation from UO2+x
Szenknect, S., Alby, D., García, M.L., et al. · Scientific Reports 10(1) · 2020
Systematic calculation of Pu Pourbaix diagrams: modelling support for the LANL ACRSP team
Reed, D.T., Coli, E., Garcia, D., Duro, L. · Los Alamos National Laboratory, LA-UR-20-26859 · 2020
Mercedes-Martín, R., Ayora, C., Tritlla, J., Sánchez-Román, M. · Earth-Science Reviews 198, 102938 · 2019
News
Latest releases and articles
GibbsStudio 6.1
GibbsStudio 6.1 brings the macOS build to the 6 line, adds water chemistry analysis and database comparison, makes Monte Carlo runs repeatable, and ships a rewritten manual.
GibbsStudio 6.0
GibbsStudio 6.0 adds PHREEQC keyword autocomplete and parameter expressions in the editor, updates to PHREEQC 3.8.8 and Qt 6.10.
GibbsStudio 5.3
GibbsStudio 5.3 is the first release to follow the official PHREEQC repository beyond the 3.8.5 release published by the USGS.
Bring your existing PHREEQC models
Inputs and databases import as they are. PHREEQC is bundled, so you can start in minutes.