GV to G4 Converter

Convert graph-based GV images to G4 format online

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Cross-Platform

The converter works on Windows, macOS, Linux, iOS, and Android. Convert GV to G4 from whichever device you have at hand.

Quality Preserved

The converter extracts the best visual data from your GV source. The resulting G4 output maintains the quality your original data supports.

Format Bridge

Go from specialized GV (graph visualization and network diagrams) to universally supported G4 — making your data accessible to anyone without niche software.

How to convert GV to G4

1

Select files from Computer, Google Drive, Dropbox, URL or by dragging it on the page.

2

Choose g4 or any other format you need as a result (more than 200 formats supported)

3

Let the file convert and you can download your g4 file right afterwards

About formats

GV is a file extension associated with the DOT graph description language, developed at AT&T Labs Research beginning in 1991, and used by the Graphviz (Graph Visualization Software) suite to define and render structured diagrams of graphs, networks, and hierarchical relationships. A GV file is a plain-text document that describes a graph using a declarative syntax: nodes are named, edges connect them with directed (digraph) or undirected (graph) links, and attributes control visual properties like shape, color, font, label text, and layout hints. The Graphviz layout engines — dot (hierarchical), neato (spring model), fdp (force-directed), circo (circular), twopi (radial), and sfdp (scalable force-directed) — read GV files and produce rendered output in formats like SVG, PNG, PDF, and PostScript. The language supports subgraphs, clusters, record-shaped nodes for database schemas, HTML-like label formatting, and rank constraints for precise control over node positioning in hierarchical layouts. One advantage is the separation of content from layout — the graph structure is specified declaratively, and the layout algorithm handles all positioning automatically, eliminating the tedious manual arrangement required by visual diagramming tools. This makes GV files ideal for programmatically generated diagrams: build systems, documentation generators, and code analysis tools can emit DOT syntax and produce professional-quality diagrams without any graphical interface. Graphviz is open source, available across all platforms, and its DOT language is supported by numerous tools including Jupyter notebooks, Doxygen, and many IDE plugins.
Developer: AT&T Labs Research
Initial release: 1991
G4 is a monochrome image format based on the ITU-T Group 4 facsimile coding standard (Recommendation T.6), ratified by the CCITT in 1984 as an improvement over Group 3 for use on error-free digital networks like ISDN rather than analog telephone lines. G4 files contain 1-bit image data compressed using exclusively two-dimensional Modified Modified READ (MMR) coding, where each scanline is encoded as a set of differences (changing elements) relative to the line above it. By eliminating the one-dimensional coding fallback and the end-of-line synchronization markers required by Group 3, G4 achieves 20-50% better compression ratios on typical document pages while producing a simpler, more regular bitstream. The format is most commonly encountered as a compression method within TIFF files (TIFF compression tag 4), where it became the standard archival format for scanned documents in enterprise document management, government records, and legal imaging systems. G4 compression is specified at 200, 300, or 400 dpi depending on the scanning application, with 300 dpi being the most common for archival-quality document imaging. One advantage is exceptional compression efficiency for document content: G4's two-dimensional prediction exploits the strong vertical correlation in text and line art pages, typically compressing a 300 dpi letter-size page to 30-50 KB — roughly half the size of equivalent Group 3 encoding. The format's entrenchment in document management infrastructure is another strength — G4 TIFF is the mandated format for many government digital records systems, court filing systems, and corporate archives, supported by every enterprise imaging platform.
Developer: ITU-T (CCITT)
Initial release: 1984

Frequently Asked Questions

Why convert GV to G4?

Group 4 fax compression for document archival — converting GV to G4 gives your graph descriptions broader reach and easier sharing across standard platforms.

What programs open G4?

Open G4 with standard tools like Windows Photos, Preview on macOS, GIMP, Photoshop, or any web browser — no special software needed.

Is the output quality comparable?

The conversion extracts the best possible quality from your GV data. The G4 output reflects the format's capabilities accurately.

Can I convert multiple GV images at once?

Yes — upload several GV images in one session and convert them all to G4 simultaneously. Batch processing saves significant time.

What platforms are supported?

The converter works on any device with a browser — Windows, macOS, Linux, iOS, Android. No platform-specific software needed.