Free Instagram Image Resizer: Feed, Portrait & Stories
Resize and center-crop photos to the exact pixel sizes Instagram wants for square feed posts, 4:5 portraits, and full-screen Stories or Reels. Everything runs in your browser; nothing is uploaded.
Drop an image here or click to browse
JPEG, PNG, WebP, up to 50 MB
Schedule everything, post everywhere
- Schedule to 9 platforms
- One content calendar
- AI adapts every post
Built for creators and teams
How It Works
Upload your photo
Drag and drop or click to select any JPEG, PNG, or WebP up to 50 MB. Begin with the sharpest, highest-resolution original you have so the result stays crisp.
Pick the Instagram format
Choose square feed, 4:5 portrait, or 9:16 Story/Reel. Each preset is locked to the exact dimensions Instagram displays, so nothing gets squeezed or stretched.
Resize and download
Hit download and your photo is center-cropped to spec, saved with a clear filename that names the format and size. Repeat for another format from the same upload.
Instagram Presets
| Platform | Format | Dimensions | Aspect Ratio |
|---|---|---|---|
| Feed Square | 1080 × 1080 px | 1:1 | |
| Feed Portrait | 1080 × 1350 px | 4:5 | |
| Story / Reel | 1080 × 1920 px | 9:16 |
Popular Use Cases
Grid Planners
Lock every feed post to a clean 1080×1080 square so your profile grid lines up evenly without Instagram cropping your composition for you.
Story & Reel Creators
Get vertical content to a true 9:16 1080×1920 frame so it fills the screen edge to edge instead of sitting in letterboxed bars.
Product Sellers
Turn one product shot into square and 4:5 portrait versions. The taller 4:5 takes up more feed real estate and tends to stop the scroll.
Social Managers
Prep an entire content batch in the three sizes Instagram uses before scheduling, so launch day has zero last-minute resizing.
Pro Tips
Use 4:5 portrait to dominate the feed
The 1080×1350 portrait is the tallest size Instagram allows in feed. It occupies more vertical space than a square, giving your post a bigger footprint as people scroll.
Start from your largest original
Scaling a big source down stays sharp; scaling a small one up turns soft. Upload the full-resolution file, not a previously exported or screenshotted copy.
Center your subject before uploading
This tool center-crops, filling the frame from the middle outward. Put the face, product, or focal point in the center of your original so it survives the crop.
Check Story safe zones
After resizing a 9:16 Story or Reel cover, run it through the Instagram Safe Zone checker so the username, caption, and tap buttons do not cover your key content.
Plan the grid before you post
Squares behave most predictably on the profile grid. Lay out how your squares sit next to each other with the Grid Maker before committing to a posting order.
Compress before uploading large files
A heavy resized file can be slow to push from a phone. Run it through the Image Compressor at high quality to shrink the size with no visible loss.
Next step
Sized for Instagram? Now make the whole feed work
A clean resize is the start. Lay out how your posts sit together with the grid maker, keep text and faces clear of the UI using the Instagram safe zone checker, then line everything up with the Instagram scheduler.
Common Issues & Solutions
Works Everywhere
Privacy, Security & Compliance
Your Privacy Matters
We don't store, log, or share any URLs or downloaded content. Your activity stays between you and the source platform.
Secure by Design
All requests are processed server-side over HTTPS. No client-side data collection or third-party trackers.
Legal Responsibility
Only download content you have rights to. Respect platform terms of service and copyright law.
This tool is intended for personal use and downloading content you own or have permission to download. Always respect the original creator's rights.
Frequently asked questions
Everything you need to know about using this tool.
Schedule and publish everywhere
Plan and schedule your social content across all 9 platforms from one calendar, with AI to tailor every post.
Loved by marketers worldwide
Join solo marketers and small teams posting smarter with Postprism
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“Postprism has completely transformed how I manage social media. What used to take me 3 hours now takes 15 minutes.”
Sarah Johnson
Marketing Manager, TechStart Inc.
“The AI adaptation is incredible. Each platform gets content that actually performs, not just copy-paste jobs.”
Michael Chen
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“I was skeptical about AI tools, but Postprism gets my brand voice right every time. Game changer.”
Emily Rodriguez
Content Creator, CreativeFlow
“Finally, a tool that understands LinkedIn is not Twitter. My LinkedIn engagement tripled in the first month.”
James Patel
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“I manage 4 client accounts solo. Postprism is the only reason that is even possible.”
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Indie Maker, ShipFast Labs
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Liam O'Brien
Content Strategist, Brandwise
“The brand voice feature is scary good. My audience said my posts felt more consistent than ever, they had no idea AI was involved.”
Priya Nair
Founder, Inkwell Studio
“Switched from Buffer and never looked back. The AI adaptations alone are worth the price.”
Carlos Vega
Growth Marketer, Launchpad Agency
“We grew our Instagram following by 40% in two months. The platform-specific tone makes a real difference.”
Mia Thornton
E-commerce Brand Manager, Glow & Go
“As a one-person team, I needed something that could scale with me. Postprism is exactly that tool.”
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Social Media Consultant, Clarity Social
“The calendar view keeps my whole content strategy visible at a glance. No more missed posts or gaps.”
Fatima Al-Rashid
Community Manager, HubCircle
“I write one good post and Postprism handles the rest. It is like having a social media team without the payroll.”
Daniel Park
Startup Founder, Loopify
“My TikTok and LinkedIn used to feel completely disconnected. Now my brand feels unified across every platform.”
Sophie Laurent
Personal Brand Coach, Evolve With Sophie
“The hashtag recommendations alone save me 20 minutes per post. Multiply that by seven platforms and it adds up fast.”
Ren Ishikawa
Digital Marketing Specialist, Orbit Media
“Honestly the best investment I made for my business this year. The time I get back goes straight into strategy.”
Grace Okonkwo
Social Media Consultant, Clarity Social
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