How to resize an image
- Drop your images into the box above.
- Enter a width and/or height in pixels — or switch to percentage to scale them.
- Download the resized images one by one or as a ZIP.
Common image sizes
- Website hero image: 1920 × 1080 px
- Blog image: 1200 px wide
- Instagram post: 1080 × 1080 px (square) or 1080 × 1350 px (portrait)
- YouTube thumbnail: 1280 × 720 px
- Email attachment: 1024–1600 px on the long side keeps files small
With Keep aspect ratio on, entering only a width calculates the height automatically, and entering both fits the image inside that box without stretching it.
Frequently asked questions
Are my images uploaded to a server?
No. ToolSmith processes every image locally in your browser. Your files are never uploaded, stored or seen by anyone — you can even disconnect from the internet after the page loads and the tool keeps working.
Will resizing make my image blurry?
Making an image smaller keeps it sharp. Enlarging beyond its original size cannot add real detail, so large upscales may look soft.
Can I resize to an exact size without keeping proportions?
Yes. Untick “Keep aspect ratio” and enter both width and height — the image will be stretched to exactly that size.
Can I process many images at once?
Yes. The free version handles up to 20 images per batch, and you can download them all as a single ZIP file. ToolSmith Pro removes the limit.
Does it work on my phone?
Yes. It works in any modern browser on Windows, macOS, Linux, iPhone, iPad and Android — there is no app to install.