RedNote (Xiaohongshu) Content Specs for Marketers: Complete 2026 Guide

RedNote — known in China as Xiaohongshu (小红书), literally "Little Red Book" — spent over a decade as a Chinese lifestyle and shopping app before most Western marketers had heard of it. That changed in January 2025, when a looming US TikTok ban sent millions of American users looking for an alternative overnight, and RedNote picked up 3 million new international users in 72 hours. It's kept growing since: the platform now counts 300+ million monthly active users and over 170,000 brand accounts, with 2025 profit estimated to have tripled year over year. Functionally, it's a hybrid of Instagram and Pinterest — visual "Notes" (image or video posts) organized around discovery and product research rather than a pure social graph. This guide covers every spec you need to publish on it correctly.

RedNote Note Image Specs

A "Note" is RedNote's core content unit — a post made up of images or a video, a title, and a body caption. Notes support three aspect ratios, but a single Note must use one ratio consistently across all its images; mixing ratios within one Note isn't supported.

Format	Dimensions	Aspect Ratio	Notes
Portrait (default)	1080 × 1440 px	3:4	Displays largest in the discovery feed; the recommended default for nearly all content
Square	1080 × 1080 px	1:1	Common for side-by-side comparisons and product shots
Landscape	1080 × 810 px	4:3	Least common in-feed; use sparingly

Cover safe zoneThe first image in a Note doubles as its cover in the feed. Keep your subject and any text in the top ~75% of the frame — the bottom 15–20% is where RedNote overlays the title, and content down there gets obscured.

RedNote Note image specs comparing 3:4, 1:1, and 4:3 aspect ratios with the cover safe zone highlighted

3:4 portrait (1080×1440) is RedNote's recommended default and displays largest in the discovery feed.

RedNote Video Specs

RedNote video leans vertical and mobile-first, closer to TikTok than to a horizontal YouTube-style player. Minimum accepted resolution is 720p, but 1080p or higher is recommended for feed placement.

Content Type	Resolution	Aspect Ratio	Max Duration	Max File Size
Note Video	1080 × 1920 px	9:16 (vertical); 1:1 also supported	Up to 15 minutes	Up to 500 MB

Duration reality check15 minutes is the technical ceiling, not the target. Product reviews typically run 2–4 minutes, tutorials 3–5 minutes, and quick tips 30–60 seconds. Longer isn't better here — completion rate drives distribution.

RedNote Text & Character Limits

Field	Limit	Notes
Note Title	20 characters	Chinese-character count; the single tightest title limit of any major platform this site tracks
Note Body	1,000 characters	Includes punctuation and spaces; best completion rates are reported around 600–800 characters
Bio	100 characters	—
Images per Note	18 images	Expanded from a 9-image cap in 2024; 6–9 is still the commonly recommended range for engagement

20 characters is not a typoRedNote's title field caps out at 20 Chinese characters — tighter than WeChat's 30-character ad headline or Pinterest's 100-character Pin title. Write the title first and treat everything else as secondary; there is very little room to work with.

RedNote video and text specs summary: 9:16 vertical only, up to 15 minutes, up to 500 MB, 720p minimum resolution, 20-character title, 1,000-character body, 100-character bio

15 minutes is the technical ceiling on video length, not the target — treat it the same way as the 1,000-character body cap.

RedNote Profile & Account Specs

Asset	Dimensions	Notes
Profile Photo	800 × 800 px recommended (400 × 400 px minimum)	Displayed as a circle
Profile Background	1125 × 630 px	~16:9 banner shown behind the profile header
Username	No published limit	No official character-count figure could be confirmed — leave generous margin

RedNote Ad Specs

RedNote's paid tools run through its 聚光 (Juguang) ad platform, reachable once an account upgrades to a Verified Business Account. Rather than a distinct fixed ad-creative spec, In-Feed and Search Ads reuse the same image and video formats as organic Notes above — the platform's own guidance is that ads should be visually indistinguishable from high-performing organic content, not polished brand collateral. A Business Account also unlocks 蒲公英 (Pugongying), RedNote's official KOL/creator marketplace, for influencer collaborations.

No separate ad-creative specUnlike Meta or LinkedIn, RedNote doesn't publish a distinct pixel spec for ad units — an In-Feed Ad is just a Note with a promotion flag. Design for the organic Note specs above and you're already ad-ready. Exact character limits for ad-specific headline/CTA fields aren't publicly documented; test conservatively.

An organic Note and a Promoted Note on RedNote use the exact same layout — the only difference is a small "Promoted" tag.

Quick Reference: RedNote at a Glance

Surface	Image Size	Video Size	Max Duration	Key Text Limit
Note (portrait)	1080 × 1440 px / 20 MB	—	—	20 chars title / 1,000 chars body
Note Video	1080 × 1920 px cover	Up to 500 MB	15 minutes	20 chars title
Profile	800 × 800 px	—	—	100 chars bio
In-Feed / Search Ad	Same as organic Note	Same as organic Note	Same as organic Note	Not publicly documented

Before you launchRedNote is still primarily a Mandarin-language platform with a China-centric user base, even with its international growth. If you're a brand outside China testing the waters, budget for real localization — not just translated captions — and expect the platform's discovery-first, authenticity-over-polish algorithm to reward native-feeling content over repurposed ad creative from other channels.