Batch Resize Images Online — Free, Bulk Resize
Resize many images to any width × height in one click. Smart crop, fit, or stretch — all in your browser. No upload, no signup, no watermarks.
· Free forever · No registration
Batch image resizing means changing many images to the same dimensions at once. Resizo's free batch resizer runs 100% in your browser — drag in up to hundreds of photos, pick a target width and height, choose Smart crop, Fit, or Stretch, and download everything as a ZIP. JPG and WEBP support a quality slider; PNG is always lossless. No upload, no account, no watermark.
Drop images to resize
or click to browse · JPG · PNG · WEBP · GIF
Common Resize Sizes
| Use Case | Dimensions | Aspect Ratio |
|---|---|---|
| Instagram Post | 1080 × 1080 | 1:1 |
| Instagram Story / Reels | 1080 × 1920 | 9:16 |
| YouTube Thumbnail | 1280 × 720 | 16:9 |
| Twitter / X Post | 1200 × 675 | 16:9 |
| LinkedIn Banner | 1200 × 627 | ~1.91:1 |
| Ecommerce Product | 2000 × 2000 | 1:1 |
Other Batch Tools
FAQ
How many images can I resize at once?
No hard limit. Browsers handle hundreds of files at once. Files larger than 20 MB are skipped automatically to keep the page responsive.
What is Smart vs Fit vs Stretch?
Smart fills the target box by cropping from the center. Fit scales the entire image inside the box and adds transparent or white padding. Stretch ignores aspect ratio entirely.
Will resizing reduce image quality?
Downscaling preserves quality nearly perfectly. Upscaling cannot add new detail. Quality slider only affects JPG and WEBP outputs (PNG is lossless).
Are images uploaded to a server?
No. Everything runs in your browser using the Canvas API. Images never leave your device.