G4 to AI Converter

Digitize G4 files to AI — free online converter

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Secure Processing

Source G4 files are deleted instantly after conversion. AI output files are auto-removed within 24 hours.

Multiple Files

Process several G4 files in a single session. Each produces a separate AI file for individual download.

Fax Preservation

Preserve fax content by converting G4 to widely supported AI — future-proof your document archive.

How to convert G4 to AI

1

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

2

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

3

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

About formats

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
AI (Adobe Illustrator Artwork) is the native file format of Adobe Illustrator, the industry-standard vector graphics editor first released in January 1987 for the Apple Macintosh. Early versions of the format were based on the PostScript page description language, with each file being a conforming EPS document that could be placed in other layouts and interpreted by PostScript printers. Starting with Illustrator 9 in 2000, Adobe transitioned the AI format to a PDF-based structure, embedding Illustrator-specific editing data within a valid PDF wrapper — this dual nature means modern AI files can be opened in any PDF viewer for display, while preserving the full editable artwork including layers, artboards, and live effects when reopened in Illustrator. The format supports complex vector constructs like gradient meshes, clipping masks, symbol libraries, transparency blending modes, and multiple artboards within a single document. One significant advantage is lossless scalability — artwork maintains perfect precision at any size, from favicon to billboard, because geometry is defined mathematically rather than as pixels. Deep integration with the Adobe Creative Cloud ecosystem is another strength, enabling seamless round-tripping between Illustrator, Photoshop, InDesign, and After Effects without format conversion. AI remains the de facto standard for professional illustration, logo design, and print production workflows worldwide.
Developer: Adobe Systems
Initial release: January 1987

Frequently Asked Questions

Why convert G4 to AI?

AI conversion preserves fax content as scalable graphics — ideal for print materials, CAD, or technical documents.

Which viewers support AI?

Open AI files using Adobe Illustrator, Inkscape, or CorelDRAW.

Will the AI result match G4 quality?

G4 to AI conversion is lossless for document content. Lines, text, and graphics all remain intact.

Does converting G4 to AI cost money?

No — standard conversions cost nothing. Premium plans offer higher limits for power users.

Does the converter accept multiple uploads?

Yes — the converter handles multiple files per session. Each G4 upload converts to AI on its own.

Do I need to create an account?

No registration is needed for standard conversions. Upload your G4 file, convert, and download the AI result.