SEG-Y File Viewer & Seismic Visualization Software
SEG-Y viewer
Open any SEG-Y. See it instantly.
g-Viewer is Geomage's SEG-Y data visualization and quality-control software — drag-and-drop loading for any dataset size, multiple datasets in one synchronized workspace, interactive location maps, and full pre-stack and post-stack QC with 3D views.
Any size
Dataset, loaded fast
Drag & drop
Instant loading
Win · Linux · Mac
Apple Silicon ready
In view
Synchronized QC workspace
Any size
SEG-Y datasets
Multi
Datasets, one workspace
Pre + Post
Stack QC tools
3D
Pre & post-stack views
Free
To start — full function
Win/Lin/Mac
macOS on Apple Silicon
g-Viewer is professional SEG-Y visualization and QC from a seismic processing company. Load any dataset size fast with drag and drop — or point it at a folder and let it sync automatically. Work with multiple datasets in one workspace with synchronized view navigation, an interactive location map for geometry QC, and full control of trace headers, styles, filters and normalization. QC pre-stack gathers with velocity overlays, spectra and cross-plots; inspect post-stack volumes in wiggle, variable density and 3D with opacity mode; and export annotated, to-scale views ready for reports.
What's inside
Four toolsets. One viewer.
From instant loading to deep pre-stack and post-stack QC — everything a geoscientist needs to see, check and share SEG-Y data.
VISUALIZATION & WORKSPACE
Visualization & QC Workspace
Any dataset size, fully synchronized
SEG-Y visualization and quality control for any dataset size, in a customizable workspace of adjustable, linked panels.
- Fast loading with drag and drop
- Multiple datasets in one workspace
- Synchronized view navigation across panels
- Full control of trace headers, styles, filters, normalization
- Interactive location map for geometry QC
- Scale bars, ruler and snapshot tools
DATASETS & GEOMETRY
Multiple Datasets & Geometry Tools
Bulk loading, headers & maps
Bring in whole surveys at once — bulk SEG-Y loading, geometry from trace headers, and instant access from a location map.
- Bulk loading of multiple SEG-Y files and geometry from trace headers
- Edit / save EBCDIC and Bin headers; standard & custom SGY header formats
- Select seismic datasets directly from the location map
- Geographic ASCII data; data preview without loading
- Preserved zoom when switching versions of the same line
- Automatic folder synchronization for instant data loading
PRE-STACK QC
Pre-stack QC Tools
Gathers, spectra & cross-plots
Inspect CS, CR and CDP gathers with velocity overlays, animation, spectral analysis and header-driven QC displays.
- CS / CR / CDP gather display with common-gather grouping
- Common-gather animation at user-defined speed
- Velocity line plotted on top of gathers for QC
- Cross-plot of any three trace headers; spectral analysis of multiple areas
- AGC / bandpass; region zoom map with header-based symbols
- 3D view for pre-stack data; 2D line display across survey volume
POST-STACK QC
Post-stack Data Views & QC
Sections, volumes & export
Wiggle and variable-density sections, 3D volumes with opacity, palettes and header plots — and annotated, to-scale image export.
- Wiggle and/or variable density; changeable seismic palettes
- Zoom by axis drag, mouse wheel or toolbar; advanced crop by IL/XL/time
- Trace headers plotted above the seismic as graphs or values
- Spectral analysis (multiple areas); AGC / bandpass; legend & colorbar
- Synchronized selected-trace display; region zoom map
- 3D view for post-stack volumes with opacity mode
Editions
Start free. Grow when ready.
g-Viewer is free to start — a fully functional trial with auto-update, so you always run the latest version.
Free trial
g-Viewer
Windows · Linux · macOS (ARM)Fully functional free trial — drag-and-drop SEG-Y loading, multi-dataset workspace, pre-stack and post-stack QC, 3D views, and auto-update with every new release.
Download nowExtended
g-Viewer Plus
SubscriptionThe extended edition for power users — with a 3-month free trial offer. See the pricing page for current plans and what's included.
See pricingIncluded
Bundled with g-Platform
Every licenseEvery g-Platform seismic processing license ships with g-Viewer, so processing teams and their clients review data and results in the same viewer.
About g-PlatformUniversities & research institutions: the full suite is free for teaching and non-commercial research under the Academic License Program.
How it works
From file to figure in six steps.
1
Drop your files
Drag and drop SEG-Y — single lines or bulk-load whole surveys with geometry read from trace headers. Preview data before loading.
2
Sync a folder
Point g-Viewer at a folder for automatic synchronization — new data appears in the workspace the moment it lands.
3
Check geometry on the map
QC geometry on the interactive location map and open any dataset directly from it.
4
QC pre-stack gathers
Animate common gathers, overlay velocity lines, cross-plot headers, and run spectral analysis over multiple areas.
5
Inspect post-stack volumes
Wiggle or variable density, advanced IL/XL/time cropping, palettes, header plots — and 3D views with opacity mode.
6
Snapshot & share
Export any view to image at a predefined scale, with annotations, scale bars, legend and colorbar — ready for reports.
See it in action
Your data, every angle.
Why g-Viewer
A viewer built by processors.
Fast on any dataset size
Visualization and QC for any dataset size, with fast drag-and-drop loading and data preview before you commit.
True multi-dataset workspace
Multiple datasets side by side with synchronized navigation, linked panels and preserved zoom between line versions.
Real QC, not just display
Velocity overlays, header cross-plots, spectral analysis, histograms and header-symbol maps — QC tooling from a processing company.
Free to start, always current
A fully functional free trial with auto-update — every new version arrives as soon as it's available.
Data & system
Your files. Your machine.
Data & headers
SEG-Y in, with full header control
SEG-YStandard SGY header formatsCustom SGY header formatsGeographic ASCII
Header tools
Edit / save EBCDICEdit / save Bin headerGeometry from trace headersHeader cross-plots
System
Desktop software, three platforms
Operating system
Windows, Linux, and macOS on Apple Silicon (ARM).
Loading
Drag and drop; bulk loading; automatic folder synchronization; preview without loading.
Updates
Auto-update — new versions delivered as soon as they are available.
Getting started
Free, fully functional trial — download and open your first SEG-Y in minutes.
The Geomage family
The viewer that ships with a platform.
g-Viewer
SEG-Y visualization & QC for any dataset size — free to start, bundled with g-Platform.
g-Platform
Full-scale 2D/3D/4D/VSP seismic processing and imaging — time, depth and VSP — on CPU/GPU clusters.
Explore g-Platform 
g-Space
Integrated seismic interpretation and 3D geomodeling — horizons, faults, petrophysics, AVO and geobodies.
Explore g-Space FAQ
Questions, answered.
What is g-Viewer?
g-Viewer is Geomage's SEG-Y data visualization and quality-control software. It loads any dataset size fast with drag and drop, supports multiple datasets in one synchronized workspace, and provides an interactive location map, full trace-header control, and pre-stack and post-stack QC tools including 3D views.
Is g-Viewer really free?
Yes — g-Viewer offers a fully functional free trial with auto-update, so you always run the latest version. An extended edition, g-Viewer Plus, is available by subscription with a 3-month free trial offer; see the pricing page for details.
Which platforms does it run on?
Windows, Linux, and macOS on Apple Silicon (ARM).
What data and header tools are included?
SEG-Y with both standard and custom SGY header formats, bulk loading of multiple files, geometry from trace headers, edit/save of EBCDIC and Bin headers, geographic ASCII data, data preview without loading, and automatic folder synchronization for instant loading.
What can I do with pre-stack data?
Display CS, CR and CDP gathers with common-gather grouping and animation at user-defined speed; plot velocity lines on top of gathers for QC; cross-plot any three trace headers; run spectral analysis over multiple areas; apply AGC/bandpass; and use region zoom maps, header-based symbols, 3D pre-stack views and 2D line displays across the survey volume.
What can I do with post-stack data?
View sections as wiggle and/or variable density with changeable palettes; zoom by axis drag, mouse wheel or toolbar; crop by inline/crossline/time; plot trace headers above the seismic; run spectral analysis; add legends and colorbars; display synchronized selected traces; and explore 3D post-stack volumes with opacity mode. Any view exports to image at a predefined scale with annotations.
Where can I download the free SEGY viewer?
Right here — g-Viewer is a free SEGY viewer download: a fully functional trial with auto-update. Click Download Free on this page, install, and drag in your first SEG-Y file in minutes.
Is there a SEG-Y viewer for Mac?
Yes — g-Viewer runs natively on macOS with Apple Silicon (ARM), as well as Windows and Linux, making it one of the few professional SEGY viewers available for Mac.
How does g-Viewer relate to g-Platform?
g-Viewer is bundled with every g-Platform seismic processing license, so processing teams and their clients can review data and results in the same viewer. It is also available standalone — free to start.
Get started free
Your SEG-Y, on screen in minutes.
Download the fully functional free trial — drag in a SEG-Y and start QC-ing. Windows, Linux and macOS (Apple Silicon), with auto-update always keeping you current.