Content Composer

Create engaging posts for all your social media platforms

Overview

The Content Composer is where you create posts for one or multiple platforms simultaneously. It provides a clean, distraction-free interface with real-time character counts, media upload, and platform-specific previews.

Multi-Platform

Write once, publish to Facebook, Instagram, Twitter, and more

Rich Media

Upload images, videos, and carousels

Auto-Save

Drafts automatically save every 30 seconds

Composer Interface

The composer uses a two-column layout for easy content creation:

Left Column (Main Editor)

•Content editor with character counter
•Media upload section (images/videos)
•Additional options (hashtags, mentions, links)

Right Column (Settings & Actions)

•Platform selector (choose accounts)
•Schedule selector (when to publish)
•Action buttons (Schedule, Post Now, Save Draft)

Writing Content

Character Limits

Each platform has different character limits. Postle shows you a live counter for each selected platform and warns you if you exceed the limit.

Platform	Character Limit	Notes
X	280	Most restrictive - write concisely
Pinterest	500	Short descriptions work best
Instagram	2,200	Caption limit for posts and reels
TikTok	2,200	Caption limit for videos
LinkedIn	3,000	Good for longer professional content
YouTube	5,000	Description limit for videos
Facebook	63,206	Practically unlimited

When posting to multiple platforms, write for the most restrictive platform (Twitter at 280 characters) to ensure your content fits everywhere.

Character Counter Visual States

The character counter changes color to help you:

Gray (0-80%): Safe zone - plenty of room
Amber (80-100%): Warning - approaching limit
Red (over 100%): Error - content too long for this platform

You cannot schedule a post if the content exceeds the character limit for any selected platform. Either shorten the content or deselect platforms with stricter limits.

Hashtags and Mentions

You can include hashtags (#) and mentions (@) directly in your content:

Hashtags: Use #hashtag anywhere in your text. They help categorize content and improve discoverability.
Mentions: Use @username to tag other users or brands. Platform-specific: Instagram and Facebook support mentions, Twitter auto-links them.
Character counting: Hashtags and mentions count toward your character limit on all platforms.

Emojis and Special Characters

All platforms support emojis and most special characters:

Use emojis to add personality and visual interest
Some emojis count as 2 characters on Twitter - the counter adjusts automatically
Line breaks are preserved on all platforms
Bullet points (•) and other symbols work on all platforms

Media Upload

Video Support Coming Soon

Video uploads are currently in development (Phase 2). Image posts are fully supported now.

Enhance your posts with images and videos. Postle handles the upload and provides previews before publishing.

Supported Image Formats

Formats: JPEG, PNG, GIF, WebP
Max size: 8MB per image
Recommended dimensions: 1080x1080 (square) or 1080x1350 (portrait) for best quality on all platforms
Multiple images: Upload up to 10 images for carousel posts (Instagram, Facebook)

Supported Video Formats

Formats: MP4, MOV, AVI
Max size: 500MB per video
Duration limits: Varies by platform (see table below)
Recommended: MP4 with H.264 codec for best compatibility

Platform	Recommended Aspect Ratio	Max Duration	Max Size
Instagram	9:16 (vertical) or 1:1 (square)	90 seconds (Reels)	500MB
TikTok	9:16 (vertical)	10 minutes	500MB
YouTube	9:16 (Shorts) or 16:9 (regular)	60 seconds (Shorts)	500MB
Facebook	16:9 or 1:1	4 hours	500MB
X	16:9 or 1:1	2 min 20 sec	500MB
LinkedIn	16:9 or 1:1	30 minutes	500MB

When uploading a video, Postle automatically detects the aspect ratio and duration, then shows warnings if the video doesn't meet requirements for any selected platform.

Image Optimization Tips

Compress before uploading: Use tools like TinyPNG or Squoosh to reduce file size without losing quality
Use high-quality images: Low-resolution images look blurry on high-DPI screens
Match platform ratios: Square (1:1) works everywhere, portrait (4:5) is best for Instagram feed
Add text overlays sparingly: Make sure text is readable on mobile

Platform-Specific Features

While Postle provides a unified interface, some platforms have unique features:

Instagram

• First 30 hashtags are active (clickable)
• Carousel posts support up to 10 images/videos
• Alt text for accessibility (added in additional options)
• Location tags (coming in Phase 2)

Facebook

• Link previews automatically generated from URLs
• Tag other Facebook Pages with @PageName
• Supports long-form content (up to 63k chars)
• Album posts with multiple photos

YouTube

• Video title required (separate from description)
• Description supports timestamps and chapters
• Hashtags limited to 3 recommended
• Tags and category (coming in Phase 2)

X

• Images don't count toward character limit
• Links are auto-shortened to 23 characters
• Max 4 images per tweet
• Thread support (coming in Phase 2)

Additional Options

Expand the "Additional Options" section in the composer to access:

Hashtag Manager

Add hashtags outside of your main content. They'll be appended to the end of your post on platforms that support them.

Tip: Save frequently-used hashtag groups for easy reuse

Mentions

Tag other users or brands. On Instagram and Facebook, mentioned accounts receive notifications.

Tip: Mentioning relevant accounts can increase visibility

Link URL

Add a URL that will be included with your post. Facebook automatically generates a preview card.

Tip: Use UTM parameters to track click sources in analytics

Publishing Options

Schedule for Later

Choose a specific date and time to publish your post:

Select "Schedule" mode in the schedule selector
Pick a date from the calendar
Choose a time (or use suggested optimal times)
Click "Schedule Post" to add it to your calendar

The schedule selector shows suggested optimal posting times based on when your audience is most active. Look for the "Optimal" badge next to recommended times.

Post Now

Publish immediately to all selected platforms:

Select "Post Now" mode in the schedule selector
Click "Post Now" button
Your post will be published within 1-2 minutes

"Post Now" cannot be undone. Once you click the button, the post will be published to all selected platforms. Double-check your content before posting!

Save as Draft

Save your work without scheduling or publishing:

Click "Save Draft" to manually save
Drafts auto-save every 30 seconds as you type
Access saved drafts from the Content Library
Drafts can be edited and scheduled later

Cross-Posting Considerations

When posting to multiple platforms simultaneously:

Character limits: Write for the most restrictive platform (Twitter at 280 characters)
Video formats: Vertical (9:16) works best for TikTok, Instagram Reels, and YouTube Shorts
Hashtags: Different platforms have different hashtag cultures. 1-3 hashtags work universally.
Image dimensions: Square (1:1) or portrait (4:5) work well everywhere

For best results, consider creating platform-specific versions of your content rather than cross-posting identical content everywhere. This allows you to optimize for each platform's unique culture and best practices.