Docu StopSee what it does
Resize images by pixels or percentage
Resize images to exact dimensions
Every platform wants a specific image size — social media headers, profile pictures, thumbnails, and email signatures all have their own ideal dimensions. Our resizer changes image dimensions by exact pixels or by percentage, so you can fit any requirement precisely. Aspect ratio is maintained by default to prevent distortion; turn it off when you need a specific width and height regardless of the original shape.
Supported formats include JPG, PNG, GIF, and WebP, and the resized output is ready to drop straight into whatever needs it. Resizing is free, works in your browser, and your image is automatically deleted from our servers after processing.
How to resize an image
- Upload your image
- Choose Pixels mode and enter width and height, or Percentage mode and a value
- Keep Maintain Aspect Ratio enabled to avoid distortion
- Click Process to resize
- Download your resized image
Tips for best results
- Resize by percentage (e.g. 50 to halve, 200 to double) when you only need a scale factor.
- Enable aspect-ratio lock for photos, disable it for exact-fit requirements like banners.
- Downscale rather than upscale whenever possible — enlarging a small image reduces sharpness.
- Resize before compressing for the smallest final file.
When should you resize an image?
Resizing is a daily task for anyone who publishes or shares images. Prepare cover photos at platform-recommended dimensions, shrink high-res camera shots before uploading to websites, create uniform thumbnails and profile pictures, and standardize product images for marketplaces. Getting the size right before upload avoids rejection by forms and layout breakage on landing pages.
What to know before you start
By default the aspect ratio is preserved, so setting one dimension scales the other automatically; disable it to force exact dimensions. The tool accepts JPG, PNG, GIF, and WebP. Processing is free, encrypted, and files are deleted automatically after the job.
Frequently asked questions
Can I resize by percentage instead of pixels?
Yes — choose "Percentage" mode and enter a value like 50 to halve the dimensions, or 200 to double them.
Will resizing distort my image?
By default, "Maintain Aspect Ratio" is enabled, so your image proportions stay correct. Disable it for custom dimensions.
What image formats are supported?
JPG, PNG, GIF, and WebP — all common web formats.
Is this tool free?
Yes, all Docu Stop web tools are completely free to use with no hidden charges or credit card required.
Are my files private and secure?
Absolutely. Files are processed over encrypted connections and automatically deleted from our servers after processing. We never access, store, or share your documents.
What is the file size limit?
Uploads are limited to approximately 4.5 MB per request due to server constraints. For larger files, download the Docu Stop mobile app which supports documents of any size.