Image Specs
Post Image
| Dimensions | Up to 4000 × 4000 px |
|---|---|
| Aspect Ratio | Any (1.91:1 recommended for feed display) |
| Max File Size | 20 MB |
| File Formats | JPG, PNG, GIF |
| Notes | Gallery posts support up to 20 images |
Gallery Post
| Dimensions | Up to 4000 × 4000 px per image |
|---|---|
| Max File Size | 20 MB per image |
| File Formats | JPG, PNG, GIF |
| Notes | Up to 20 images; each can have its own caption (180 characters) |
[Ad]
Video Specs
Post Video
| Aspect Ratio | Any; 16:9 displays best |
|---|---|
| Max File Size | 1 GB |
| File Formats | MP4, MOV |
| Resolution | 1920 × 1080 px recommended |
| Max Duration | Up to 15 minutes |
| Notes | H.264 codec; audio optional but supported; GIF-style looping also available |
Text & Character Limits
Post Title
| Character Limit | 300 characters |
|---|---|
| Notes | Required; shown in feed and search results |
Post Body (Text)
| Character Limit | 40,000 characters |
|---|---|
| Notes | Rich text editor; supports Markdown formatting |
Comment
| Character Limit | 10,000 characters |
|---|
Profile Bio
| Character Limit | 200 characters |
|---|
Username
| Character Limit | 20 characters |
|---|---|
| Notes | Cannot be changed after creation |
Subreddit Name
| Character Limit | 21 characters |
|---|
Profile & Cover Assets
Avatar
| Dimensions | 256 × 256 px minimum |
|---|---|
| Max File Size | 10 MB |
| File Formats | JPG, PNG |
| Notes | Displayed as a circle |
Profile Banner
| Dimensions | 1600 × 600 px |
|---|---|
| Max File Size | 10 MB |
| File Formats | JPG, PNG |
Subreddit Icon
| Dimensions | 256 × 256 px |
|---|---|
| Max File Size | 500 KB |
| File Formats | JPG, PNG |
| Notes | Displayed as a circle |
Subreddit Banner
| Dimensions | 4000 × 640 px |
|---|---|
| Max File Size | 10 MB |
| File Formats | JPG, PNG |
Ad Specs
Promoted Post (Image)
| Dimensions | 1200 × 628 px or 1080 × 1080 px |
|---|---|
| Max File Size | 30 MB |
| File Formats | JPG, PNG |
Promoted Post (Video)
| Max File Size | 1 GB |
|---|---|
| File Formats | MP4, MOV |
| Resolution | 1920 × 1080 px or 1080 × 1080 px |
| Max Duration | Up to 30 minutes |
Carousel Ad
| Dimensions | 1080 × 1080 px per card |
|---|---|
| Notes | 2–6 cards per carousel |
Ad Headline
| Character Limit | 300 characters |
|---|
Ad Body
| Character Limit | 500 characters |
|---|