Automated Postly Tool
Resize Images Online for Every Platform
Auto-Fix applies the right dimensions and safe areas when you publish with Postly—no guessing, no re-exports. Create once, schedule everywhere.
Desktop preview
Safe areas & banners
Mobile preview
Stories, Reels & Shorts
Auto-apply on publish
No manual exports
Exact width presets per platform
Aspect ratios: 1:1, 4:5, 9:16, 16:9, 2:1
Safe-area guides for Reels/Stories/Shorts
Sharpness-preserving scaling
Pixel-perfect banners & thumbnails
Smart, face-aware crop (when applicable)
How Auto-Fix Works During Publishing
- Upload or select your creative in Postly.
- Choose platforms; Auto-Fix selects the right size and aspect ratio for each destination.
- Review live previews with safe-area overlays.
- Schedule or publish—Auto-Fix renders the final images per platform automatically.
Why resize images online with Postly?
- Resize images online with automated social media presets.
- Instagram, LinkedIn, TikTok, YouTube, Facebook, and Pinterest sizes supported.
- Keep branding consistent across campaigns and channels.
- Batch-prepare assets while scheduling posts in Postly.
- Reduce manual edits, rejections, and republishing cycles.
Supported presets
Instagram square/portrait/story/reel cover, X (Twitter) post/header, LinkedIn post/banner, TikTok story/cover, YouTube thumbnail, Facebook post/cover, Pinterest pin & more.
Frequently Asked Questions
How is this different from a regular image resizer?
Postly Auto-Fix is connected to publishing. It applies platform-specific sizes and safe areas automatically when you schedule posts—so your images are ready the moment you publish.
Can I lock a specific aspect ratio?
Yes. Choose 1:1, 4:5, 9:16, 16:9, and more. Auto-Fix adapts crops to preserve key content where possible.
Does resizing reduce my quality?
Auto-Fix uses quality-preserving scaling and optional sharpening for crisp results on mobile and desktop.
Is there a preview?
Yes, you’ll see a platform preview (with safe-area overlays) before publishing.