When creating assets on NFT.io, there are various different file types to choose from for the asset media.
To help you choose, here is a breakdown of the supported file types:
| Media Type | File Type | Description | Best For |
| Image | JPG / JPEG | Lightweight image file, loads fast, usually lower quality. | Large collections; good when you want to save storage space and don’t mind losing quality. |
| Image | PNG | Heavyweight image file, high-quality, loads slower than jpeg. Supports transparency. | Best image quality / when transparency is needed. |
| Image / Animation | WEBP | Best of both worlds. High-quality lightweight image /animation file that supports transparency. |
High-quality image / animation. The only disadvantage is that it is less used and not widely supported. |
| Animation | GIF | Supports transparency and basic animation. Lightweight low-quality animation. | Low quality animations / when transparency is needed in an animation. |
| 3D Object | GLB | A 3D object that may contain information about 3D scenes, models, lighting, materials, node hierarchy, and animations. | 3D objects |
| Video + Audio | MP4 | Most common and most popular video format, can be compressed with a very slight loss of quality. | If there are no special requirements, usually go with MP4 for videos. |
| Video + Audio | OGV | Lightweight video file, less popular. | If you need the lightest file size. |
| Video + Audio | WEBM | Used for web pages for faster loading. | Use for faster video loading. |
| Audio | MP3 | Most common and most popular audio format. Lightweight, and not the best audio quality. |
If there are no special requirements, usually go with MP3 for audio. |
| Audio | WAV | Heavyweight audio file, high-quality. | When high-quality audio is needed. |
| Audio | OGG | Technically can store video as well, primarily used for audio. OGG can store more audio channels than MP3. |
When more audio channels are needed. |
| Audio | MPEG (audio) | Standard for audio compression and encoding | Storing audio files that require a balance between file size and audio quality. Widely used for music streaming, digital downloads, and broadcasting. |
| Video | X-M4V | Used to store digital video and digital audio streams, commonly associated with Apple's iTunes Store. Supports advanced features like chapter markers, menus, and hyperlinks | Streaming video content (especially for Apple devices). |
| Video + Audio + Subtitle | X-MATROSKA | Also known as MKV. Can hold unlimited number of video, audio, picture, or subtitle tracks in one file. | Storing high-definition video, including 4K and beyond. |
Note: the max file size is 50MB and recommended size is 1000x1000.