# Supported File Types and Image Requirements for NFTs on Mintable

### ✅ Recommended Image Dimensions

* **Minimum size:** 800px × 800px
* **Recommended:** Use **high-resolution** images larger than 800px × 800px for best results on listings and collection pages
* **Supported formats:** JPG, PNG, GIF, WEBP

***

### 🎥 Uploading MP4 and GLB Files

Mintable also supports **interactive 3D files and video files** as part of your NFT preview.

| File Type          | Description                                                      |
| ------------------ | ---------------------------------------------------------------- |
| **.GLB (3D File)** | Allows users to interact with a 3D model directly in the browser |
| **.MP4 (Video)**   | Lets users watch a video preview in the NFT’s item page          |

> ⚠️ **Important:** You must **still upload a basic image** (JPG/PNG/etc.) to serve as the **default display image**, even if you're including an MP4 or GLB file.

***

### 🚫 File Naming Requirements

Avoid special characters in file names. The following **will prevent your file from uploading**:

* Symbols like: `$ % * & # @ ( ) [ ]`
* **Non-English characters**, including accented or non-Latin scripts

> ✅ Stick to **letters, numbers, underscores, or hyphens** in file names to ensure successful uploads.

***

### 🛠️ Having Upload Issues?

If your file won’t upload, try the following troubleshooting steps:

1. **Check your file name** – remove any special characters
2. **Disable all browser extensions except MetaMask**
3. **Close all Mintable tabs**, refresh your browser, and try uploading again
4. Ensure your file meets size and format requirements