How to use the Image Resizer
- Add your image
- Enter the new width in pixels and choose a format
- Click Convert and download the resized image
About this tool
Resize photos for websites, social media or email by setting a new width. Height is calculated automatically so the picture is never stretched. Smaller dimensions also mean smaller files and faster pages.
Resize or compress: which do you need?
Resizing changes the width and height in pixels, which reduces file size because there are fewer pixels to store. Compressing keeps the size in pixels and lowers the quality setting. For big camera photos, resizing first and then using the Image Compressor gives the smallest result.
Common widths to use
- 1920 px: full-width website banners and Full HD screens.
- 1200 px: a typical width for social sharing images and large blog images.
- 1080 px: a common width for social media feed posts.
- 800 px: a comfortable width for images inside blog posts and emails.
- 300–400 px: thumbnails and small avatars.
How the tool resizes
You set the new width in pixels and the height is calculated automatically, so the picture is never stretched. Making an image larger than the original is possible, but it cannot add real detail, so enlarged images look soft. You can also choose the output format: PNG, JPG or WebP.
Privacy and limits
Files are processed inside your browser and are not uploaded to FormatVolt. Each file can be up to 50 MB. Very large images or PDFs can fail on devices with little memory, so try a smaller file or a desktop browser if that happens.
Frequently asked questions
Is it really free?
Yes. There are no limits, watermarks or sign-ups.
Are my files uploaded anywhere?
No. The conversion runs inside your browser, so your files never leave your device.
Will my image be stretched?
No. The height is calculated from the width, so the aspect ratio stays the same.
Can I make an image larger?
Yes, but enlarging cannot add detail, so very large increases look soft.
Does the Image Resizer keep the aspect ratio?
Yes. You enter the width and the height changes in proportion, so the image is not distorted.
Can I make an image bigger?
You can, but the tool cannot invent detail, so the result looks blurrier. For the best quality, start from the largest original you have.
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Last updated: November 6, 2026