Method 1: Browser-based tools (best option)
The simplest approach is using a browser-based tool directly on your phone:
- Open PhotoResizer.in in Chrome or Safari.
- Tap to upload your photo from your gallery.
- Set your target dimensions and/or KB size.
- Download the resized image.
This works on any phone with a browser — no app installation needed. The image is processed locally on your device.
Method 2: Built-in iPhone tools
- iOS Shortcuts app: Create a shortcut that resizes images automatically. Open Shortcuts → Create New → Add "Resize Image" action → set dimensions → Add "Save to Photo Album".
- Mail trick: Attach the photo to an email, iOS will prompt you to choose Small, Medium, or Large. Save the resized version.
Method 3: Android built-in options
- Google Photos: Share the photo → select quality/size before sharing.
- Samsung Gallery: Edit → Resize option (available on Samsung devices).
- Files by Google: Can compress images as part of its cleanup feature.
Method 4: Lightweight apps
If you frequently need to resize photos on mobile, consider these lightweight apps:
- Photo Compress 2.0 (Android) — simple and ad-free.
- Image Size (iOS) — resize by pixels, mm, cm, or inches.
For a comprehensive comparison, see our best passport photo apps guide.