Image Specs
Note Image (Portrait)
| Dimensions | 1080 × 1440 px |
|---|---|
| Aspect Ratio | 3:4 |
| Max File Size | 20 MB per image |
| File Formats | JPG, PNG |
| Notes | Primary/default format — displays largest in the discovery feed. A note must use one aspect ratio across all its images; mixing ratios within a single note is not supported |
Note Image (Square)
| Dimensions | 1080 × 1080 px |
|---|---|
| Aspect Ratio | 1:1 |
| Max File Size | 20 MB per image |
| File Formats | JPG, PNG |
Note Image (Landscape)
| Dimensions | 1080 × 810 px |
|---|---|
| Aspect Ratio | 4:3 |
| Max File Size | 20 MB per image |
| File Formats | JPG, PNG |
Note Cover
| Dimensions | 1080 × 1440 px (3:4) or 1080 × 1080 px (1:1) |
|---|---|
| Max File Size | 20 MB |
| File Formats | JPG, PNG |
| Notes | First image in the note; keep key text/subject in the top ~75% of the frame — the bottom 15–20% can be obscured by the title overlay in feed |
[Ad]
Video Specs
Note Video
| Aspect Ratio | 9:16 (vertical); 1:1 square also supported |
|---|---|
| Max File Size | Up to 500 MB (some third-party guides report up to 1 GB — not independently confirmed against an official source) |
| File Formats | MP4, MOV |
| Resolution | 1080 × 1920 px |
| Max Duration | Up to 15 minutes |
| Notes | H.264 codec recommended; minimum resolution 720p, 1080p+ recommended. 16:9 horizontal is technically accepted but not recommended for mobile-first feed display |
Video Cover
| Dimensions | 1080 × 1920 px (9:16) or 1080 × 1440 px (3:4) |
|---|---|
| Max File Size | 20 MB |
| File Formats | JPG, PNG |
| Notes | Custom thumbnail shown before playback and in the feed grid |
Text & Character Limits
Note Title
| Character Limit | 20 characters |
|---|
Note Body
| Character Limit | 1,000 characters |
|---|---|
| Notes | Includes punctuation and spaces; best completion/read-through rates are reported around 600–800 characters, well under the hard cap |
Bio
| Character Limit | 100 characters |
|---|
Images per Note
| Character Limit | 18 images |
|---|---|
| Notes | Expanded from a 9-image cap in 2024; 6–9 images is the commonly recommended range for engagement, even though more are technically allowed |
Profile & Account Assets
Profile Photo
| Dimensions | 800 × 800 px recommended (400 × 400 px minimum) |
|---|---|
| Max File Size | 20 MB |
| File Formats | JPG, PNG |
| Notes | Displayed as a circle; upload at 800×800 for retina sharpness |
Profile Background
| Dimensions | 1125 × 630 px |
|---|---|
| Aspect Ratio | ~16:9 |
| File Formats | JPG, PNG |
Username
| Character Limit | Not publicly documented characters |
|---|---|
| Notes | No official character-limit figure could be confirmed against a dated source at time of writing |
Ad Specs
In-Feed / Search Ad
| Dimensions | Same image/video specs as organic Notes (see above) |
|---|---|
| Notes | Run through RedNote's 聚光 (Juguang) ad platform. Ads are designed to be visually indistinguishable from high-performing organic Notes rather than following a distinct fixed-creative spec — exact character limits for ad-specific headline/CTA fields are not publicly documented in English or Chinese sources found during this pass |
Business Account
| Notes | A Verified Business Account is required to unlock advanced ad tools (Juguang, Pugongying/蒲公英 KOL marketplace, Chengfeng/Qianfan). Requires a registered business entity; process and requirements differ for mainland Chinese vs. international brands |
|---|