ResizeBox is a free online tool to resize, convert, and compress images with real-time preview and quality control.
- for
- Web designers, marketers, and anyone needing quick image resizing and optimization.
- pricing
- free
Key features
- Smart Image Resize — Uses intelligent algorithms to preserve detail and clarity while resizing.
- Image Compression — Compresses images to reduce file size without noticeable quality loss.
- Real-time Preview — Shows instant preview of resized images before download.
- High Quality Output — Maintains original detail and avoids artifacts during resizing.
- Multiple Format Support — Handles JPG, PNG, WebP, GIF and more, with format conversion.
- Flexible Sizing Options — Resize by pixels, inches, cm, mm, set DPI, aspect ratio or percentage.
Use cases
- Resize product photos for Shopify listings
- Create social-media graphics for Instagram and TikTok
- Prepare web-ready images with reduced file size for faster page loads
Image Resizer Tool vs alternatives
Frameright | Percept Pixel | Compress | toddle | ||
|---|---|---|---|---|---|
| Best for | Online image resizing with privacy | Responsive image management | Image CDN and on-the-fly transformations | Video compression | Rapid web app development |
| Pricing | Free | Free | Free | Free | Free |
| DevHunt upvotes | 0 | 78 | 18 | 55 | 147 |
| Launched | Jun 2025 | Jan 2023 | Jan 2024 | Mar 2024 | Jan 2023 |
- Image Resizer Tool vs Frameright: Focuses on responsive image behavior and container handling rather than bulk resizing.
- Image Resizer Tool vs Percept Pixel: Provides CDN delivery and transformation services, not a client-side resizer.
- Image Resizer Tool vs Compress: Compresses videos, not images, and targets a different media type.
- Image Resizer Tool vs toddle: A no-code web-app builder, unrelated to image resizing.
Image Resizer Tool FAQ
How do I resize an image?+
Upload the image (max 20 MB), set dimensions in pixels/inches/cm/mm, adjust quality or format, preview, then download.
Will quality decrease when resizing?+
The tool uses smart algorithms and a quality slider to keep maximum detail; you control the balance between size and clarity.
What formats are supported?+
JPG/JPEG, PNG, GIF, WebP, BMP, and TIFF are supported for both input and output.
Is the service free?+
Yes, ResizeBox is completely free with no hidden fees, watermarks, or registration required.
Are my images private?+
All processing happens locally in the browser; images never leave your device.
How can I reduce file size?+
Adjust the quality slider during resize or use the built-in compression feature to lower file size while preserving visual quality.
Summarized by DevHunt from resizebox.com · Sep 28, 2026. Details may change; check the official site.
Frameright
Percept Pixel
Compress
toddle









