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Convert OST to GIF files online with our free email converter app. No matter your platform — Windows 10, Mac, Android or iPhone — you can convert OST files rapidly.
Common email-related file formats include MSG, EMLX, and VCF. MSG is used by Microsoft Outlook to store individual email messages with their metadata. EMLX is a similar format used by Apple Mail for single email files. VCF (vCard) is used for storing contact information.
To change OST to GIF, simply upload your OST file, choose a target format, and click Convert. Once done, your file will be ready to download instantly.
Check our videoAn OST (Outlook Offline Data File) is a file format used by Microsoft Outlook to store a synchronized copy of mailbox data locally, enabling offline access to emails, calendars, contacts, and other items. It is primarily used by Microsoft Outlook and can be accessed or converted using tools like Kernel OST to PST Converter, Stellar Converter for OST, and SysTools OST Viewer. The OST file structure is based on the Messaging Application Programming Interface (MAPI) and supports advanced features like synchronization with Exchange Server, encryption, and data compression for efficient storage and security.
The GIF is a widely used bitmap image format known for its support of animations and lossless compression, making it ideal for simple graphics and short animations. It is supported by most image viewers, web browsers, and editing tools like Adobe Photoshop, GIMP, and online platforms such as Canva. The format uses a color palette of up to 256 colors, supports transparency, and stores multiple frames in a single file, enabling looping animations with optional interlacing for progressive display.
You can also convert OST into many other file formats. Please see the complete list below.