Convert OTB to G4
Convert OTB images to G4 format, edit and optimize images online and free.
Drop Files Anywhere to Upload
The OTB (Over The Air Bitmap) file extension, developed by Nokia, is used for transmitting black and white bitmap images between mobile phones, particularly Nokia and Siemens models. These images, with a maximum resolution of 255x255 pixels, are often sent via SMS in either hexadecimal text or binary format. Historically, OTB files were popular in the early days of mobile communication for sending simple graphics, icons, and wallpapers when data transmission speeds were limited.
The G4 file extension, standing for CCITT Group 4 Fax Image, is a specialized format used primarily for storing black-and-white facsimile (fax) images. Its origins trace back to the Consultative Committee for International Telegraphy and Telephony (CCITT), now known as the ITU-T, which developed the Group 4 standard in the 1980s to improve fax transmission efficiency over digital networks. This format employs a high compression ratio to reduce file size while maintaining image quality, making it ideal for archiving documents and transmitting faxes in professional and business environments.
Drag and drop or manually select the OTB file from your system.
Customize the OTB to G4 conversion using available tools before confirming.
Finalize the G4 image conversion and proceed with downloading the file.
To change OTB format to G4, upload your OTB file to proceed to the preview page. Use any available tools if you want to edit and manipulate your OTB file. Click on the convert button and wait for the convert to complete. Download the converted G4 file afterward.
The Vertopal CLI ensures reliable conversion of OTB image into G4 image formats.
cd to move into the OTB directory or include the path.