How to Resize Images on Mobile — No App Needed

Need to quickly resize a photo on your phone? Most people think they need to install an app — but Resizo works perfectly in your mobile browser. No install, no storage space used, no account needed.

Why You Don't Need an Image Resizer App

• Apps consume storage space (50–200 MB each)
• Many free apps show intrusive ads
• Some apps upload your photos to their servers
• Apps require permissions you may not want to grant
• Resizo works in any mobile browser — Safari, Chrome, Firefox, Samsung Internet

How to Resize an Image on iPhone

• Open Safari and go to resizo.in
• Tap to select your photo from the camera roll
• Enter new dimensions — aspect ratio locks automatically
• Choose format (JPG for photos, PNG for screenshots)
• Tap Download — the resized image saves to your Files or Photos

How to Resize an Image on Android

• Open Chrome (or any browser) and go to resizo.in
• Tap to upload from Gallery or Files
• Set width or height — aspect ratio locks automatically
• Choose format and quality
• Tap Download — goes to your Downloads folder

Common Mobile Use Cases

Task	Recommended Size
Email attachment	800px wide, JPG 80%
Instagram post	1080 × 1350 (4:5)
WhatsApp profile	500 × 500
ID or document scan	1200px wide, PNG
Product listing	1000 × 1000, WebP

Everything Stays on Your Phone

Resizo processes your photos 100% in your mobile browser. Nothing is uploaded — your photos never leave your device. This is especially important when resizing personal photos, ID scans, or sensitive documents.