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.