PNG vs G3 — Comparison & Free Converter
Fast, instant PNG to G3 (FAX) conversion. No signup required. Just drop your .png file and get .g3 in seconds.
Batch Settings
Vous travaillez avec des images et le format PNG, si pratique pour sa qualité et sa transparence, ne répond plus tout à fait à vos besoins pour certaines applications ? Que ce soit pour optimiser l'envoi de télécopies, réduire drastiquement la taille de vos fichiers pour des archives, ou assurer une compatibilité maximale avec des systèmes plus anciens, la conversion de PNG vers G3 est une solution technique précise et efficace. Ce format, bien que moins courant aujourd'hui pour le grand public, reste un standard incontournable dans des domaines où la compression monochrome et la transmission fiable sont primordiales. Notre outil vous offre une méthode simple et rapide pour transformer vos images PNG en G3, garantissant ainsi une conformité et une efficacité optimales pour vos documents numériques. Découvrez comment simplifier vos flux de travail et garantir la pérennité de vos informations avec cette conversion ciblée.
- Archivage de documents administratifs dématérialisés
- Transmission de télécopies via des serveurs T.38
- Intégration dans des systèmes de gestion documentaire patrimoniaux
En France, en Belgique et en Suisse, le format G3 (Group 3 Fax) est encore fréquemment requis pour l'échange de documents officiels ou la numérisation de courriers, notamment pour les administrations et certaines professions libérales qui maintiennent des infrastructures de télécopie.
About PNG to G3 (FAX) Conversion
PNG or G3 — which format should you use? The answer depends on your needs. Here's a quick breakdown.
PNG uses lossless compression and supports transparency, making it perfect for graphics, logos, and screenshots. It has universal platform support. G3 is a widely used file format. It has common platform support.
So when should you convert PNG to G3? This conversion is ideal when you When you need a G3 file. This conversion helps you convert between formats quickly.
Converting PNG to G3 maintains high quality with CocoConvert's optimised encoder settings.
If you've decided G3 is the right choice, CocoConvert makes the conversion effortless. Upload your .png file, pick G3, and click Convert — done in seconds. The converter runs on secure servers in Germany, powered by FFmpeg, Sharp, and qpdf. Files are encrypted via TLS and erased within 24 hours.
Free tier: 5 files/hour, 250 MB each. Pro: 100 files/hour, 5 GB each. Works in every modern browser on desktop and mobile.
How to Convert PNG to G3 (FAX)
- 1
Choose your PNG file
Upload your .png file using drag-and-drop or the file browser. Batch mode lets you add multiple files.
- 2
Set format to G3
Select .g3 from the output options. The converter applies optimal quality settings automatically.
- 3
Run the conversion
Click Convert. Server-side processing means your device stays fast — even for large image files.
- 4
Get your G3 file
Download your converted file instantly. Batch downloads are available as a zip archive.
What Happens When You Convert PNG to G3 (FAX)
Your PNG file is decoded and re-encoded as G3.
Your PNG file is uploaded and validated
The file is decoded (parsed into its raw data)
The data is re-encoded in G3 format
The converted file is ready for download
Format Comparison
PNG
.png file
| Extension | .png |
| MIME Type | image/png |
| Category | Image |
G3 (FAX)
.g3 file
| Extension | .g3 |
| MIME Type | image/g3fax |
| Category | Image |
Should You Convert PNG to G3 (FAX)?
When to Convert
- ✓When you need a G3 file
Frequently Asked Questions
Should I use PNG or G3?
It depends on your goal. PNG preserves full quality. G3 preserves full quality. Choose based on whether file size or quality matters more for your use case.
Is G3 higher quality than PNG?
Not necessarily. Converting PNG to G3 maintains high quality with CocoConvert's optimised encoder settings. Quality depends on the compression type and settings, not just the format name.
Can I convert PNG to G3 on Mac and Windows?
Yes. CocoConvert is a web-based tool that works in all modern browsers — Chrome, Safari, Firefox, Edge — on any operating system including macOS, Windows, Linux, iOS, and Android.
Is CocoConvert free for PNG to G3?
Yes. Free users get 5 conversions per hour (250 MB each). Pro subscribers unlock 100 files per hour, 5 GB per file, and priority processing.
What tools does CocoConvert use for PNG to G3?
CocoConvert uses FFmpeg for audio/video, Sharp for images, and qpdf for documents — the same open-source libraries used by Netflix, YouTube, and major enterprise platforms.
Versions are pinned in our worker Dockerfile and re-built via CI on every change.