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

  1. Upload or select your creative in Postly.
  2. Choose platforms; Auto-Fix selects the right size and aspect ratio for each destination.
  3. Review live previews with safe-area overlays.
  4. 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.