How to Convert ICO to G3 — Quick & Free
Fast, instant ICO to G3 (FAX) conversion. No signup required. Just drop your .ico file and get .g3 in seconds.
Batch Settings
Vous avez un fichier ICO et la nécessité de le convertir au format G3 ? Que ce soit pour des raisons de compatibilité, d'archivage ou d'intégration dans un système spécifique, cette opération est courante dans de nombreux contextes professionnels et académiques. Le format ICO, principalement utilisé pour les icônes Windows, ne se prête pas toujours aux exigences de certains systèmes d'information ou de communication. Le G3, quant à lui, est un format d'image compressé, souvent privilégié pour la télécopie et les documents numériques nécessitant une transmission rapide et efficace. Notre outil vous permet de réaliser cette conversion de manière fluide et sécurisée, en préservant l'intégrité de vos données. Fini les tracas liés aux formats incompatibles, notre solution est là pour simplifier vos démarches.
- Archivage de documents administratifs (France)
- Publication de schémas techniques (Belgique)
- Intégration de logos dans des systèmes d'information (Québec)
En Suisse, l'utilisation du format G3 est encore répandue dans le secteur bancaire et des assurances pour la numérisation et l'échange de documents scannés, garantissant une compatibilité avec des systèmes plus anciens tout en optimisant la taille des fichiers.
About ICO to G3 (FAX) Conversion
Short answer: yes, you can convert ICO to G3 online for free, and quality is well preserved with the right settings. Just upload your .ico file to CocoConvert, pick G3 as the output, and click Convert. The whole process takes seconds.
Now for the details. ICO is the icon format used for website favicons and Windows application icons. G3 is a widely used file format. Converting between these two formats lets you convert between formats quickly.
Your ICO file is decoded and re-encoded as G3. Converting ICO to G3 maintains high quality with CocoConvert's optimised encoder settings.
CocoConvert runs entirely online — no software to install, no account to create. Your files are encrypted during upload (TLS), processed on isolated servers in Germany, and permanently deleted after 24 hours. It works in Chrome, Safari, Firefox, Edge, and all mobile browsers.
Need to convert more than one file? Free users can do 5 per hour. Pro gets 100 per hour with files up to 5 GB each.
How to Convert ICO to G3 (FAX)
- 1
1. Upload ICO
Drop your .ico file onto the page (or tap "Browse" on mobile). Add multiple files for batch conversion.
- 2
2. Select G3
Choose .g3 from the output dropdown. Settings are pre-configured for best results.
- 3
3. Convert
One click. The server handles all the heavy lifting using FFmpeg and Sharp.
- 4
4. Download
Your .g3 file is ready. Download it directly or get all files as a zip archive.
What Happens When You Convert ICO to G3 (FAX)
Your ICO file is decoded and re-encoded as G3.
Your ICO 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
ICO
.ico file
| Extension | .ico |
| MIME Type | image/x-icon |
| Category | Image |
G3 (FAX)
.g3 file
| Extension | .g3 |
| MIME Type | image/g3fax |
| Category | Image |
Should You Convert ICO to G3 (FAX)?
When to Convert
- ✓When you need a G3 file
Frequently Asked Questions
Is ICO to G3 conversion free?
Yes. CocoConvert offers free ICO to G3 conversion with generous daily limits — 25 minutes of processing time and up to 5 files per hour (250 MB each). Pro plans remove these limits.
How fast is ICO to G3 conversion?
Most files convert in 2–10 seconds depending on size. Large image files may take 30 seconds. Batch jobs process in parallel for maximum speed.
What happens to my files after conversion?
Your uploaded ICO file and the converted G3 file are both automatically deleted from our servers within 24 hours. They are never shared, sold, or analysed.
Does converting ICO to G3 lose quality?
Converting ICO to G3 maintains high quality with CocoConvert's optimised encoder settings.
Can I convert G3 back to ICO?
Yes, CocoConvert supports G3 to ICO conversion as well. However, if the original conversion involved lossy compression, converting back won't recover the lost data.
Versions are pinned in our worker Dockerfile and re-built via CI on every change.