Online Image Editor & Photo Editor

Auto-Fix Images for Publishing - Resize, Compress & Convert

Postly's image editor automatically optimizes your visuals for every social platform. Resize, crop, convert formats (JPEG, PNG, WebP, HEIF, RAW), and compress with one click. Stay sharp, fast, and on-brand across Instagram, X (Twitter), LinkedIn, TikTok, YouTube and more.

  • Auto-resizing presets for Instagram, X (Twitter), LinkedIn, TikTok, YouTube & Facebook
  • Smart compression for smaller file sizes without visible quality loss
  • Format conversion: JPEG, PNG, BMP, TIFF, WebP, SVG, HEIF, RAW, ICO supported
  • Real-time previews per platform and safe-area guides
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Screenshot of Postly image editor showing auto-resize and compression preview

Auto-Resizing Presets

Perfect sizes for Instagram posts, Reels covers, Stories, LinkedIn banners, YouTube thumbnails, and more.

Format Conversion

Convert PNG ↔ JPG, WebP, HEIF, TIFF, RAW. Keep transparency where supported and export the best format for web.

Smart Compression

Reduce file size while preserving detail. Faster uploads and sharper visuals across devices.

What You Can Do With This Image Editor

  • Resize images online for any social media platform
  • Compress photos for web without losing visible quality
  • Convert HEIF/HEIC, WebP, PNG, and RAW to JPG
  • Batch-prepare campaign visuals with consistent specs
  • Preview safe areas for Reels, Stories, and Shorts
  • Standardize aspect ratios (1:1, 4:5, 16:9, 9:16)
  • Automate platform-specific exports and naming
  • Ship polished creatives faster with fewer edits

Frequently Asked Questions

How does the image editor handle platform requirements?

It automatically resizes, crops, converts formats, and compresses your image to meet each platform’s specs—no manual adjustments needed.

What if my image is the wrong format?

Postly will convert the image for you (JPEG, PNG, WebP, HEIF, TIFF, RAW). If a format is incompatible, you’ll get a clear prompt to replace or export differently.

Can I review changes before publishing?

Yes. Real-time previews show platform-specific outputs and safe areas so you can fine-tune before publishing.

Does it support professional formats like RAW or HEIF?

Absolutely. We support a broad range of formats including RAW and HEIF/HEIC, with exports optimized for web and social media.

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