Resize Image Online — Free, Private, In Your Browser

Guide: resizing images to exact pixel dimensions

What happens when you click Resize

The resizer draws your image onto a new canvas of the size you chose, using the browser's high-quality smoothing, and saves it in the same format you uploaded. JPG and WEBP are saved at quality 0.92 and PNG is saved without loss. Width and height can each be anything from 1 to 10,000 pixels. The result screen shows the old and new dimensions and the change in file size, and the download is named after the new size, for example resized-1080x1350.jpg. Everything runs in your browser and nothing is uploaded.

The three ways to set a size

• Dimensions: the boxes start with your original width and height. With Lock ratio switched on (the default), typing one side calculates the other so the picture keeps its shape.
• Percentage: a slider from 10 to 200 percent, starting at 50. The exact pixel result is shown next to it.
• Presets: six fixed sizes: Instagram Square 1080x1080, Instagram Story 1080x1920, Facebook Cover 820x312, YouTube Thumb 1280x720, Twitter Post 1200x675 and LinkedIn Post 1200x627.

Presets stretch, they do not crop

This is the most important thing to know about the presets. A preset sets both the width and the height exactly, so if your photo has a different shape, it will be squashed or stretched to fit. A normal 4:3 phone photo resized to Instagram Story will make people look thin and tall. The same happens in the Dimensions tab if you switch Lock ratio off and type both numbers.

To avoid distortion, crop the photo to the preset's shape first with the Crop tool: 1:1 for Instagram Square, 9:16 for Story, and 16:9 for YouTube and Twitter. The Facebook Cover and LinkedIn shapes are wider, so use Free crop and keep the frame long and narrow. Then apply the preset, and the picture will only be scaled, not bent.

Resizing for forms and documents

Exam, job and scholarship portals in India usually give two separate limits: dimensions in pixels and file size in KB. This tool handles the first. Crop to the required shape, enter the exact width and height, then reduce the file with Compress to Size or a fixed target such as Compress to 50 KB. Making an image smaller in pixels does reduce its file size, but it does not guarantee a particular KB number.

If a form gives the size in centimetres, convert it to pixels first. At 300 pixels per inch, 1 cm is about 118 pixels, so 3.5 cm is roughly 413 pixels. The resizer works only in pixels and does not write a DPI value into the file.

Resizing a photo for a passport or visa

Passport and visa photos have a fixed shape, so resizing alone is not enough: a phone photo is usually 3:4 or 9:16, and typing passport pixels straight into the boxes would squash your face. Crop to the right shape first with the Crop tool, keeping your head centred with a little space above it, then enter the pixel size here. These are the usual pixel sizes at 300 DPI:

• 35 × 45 mm (3.5 × 4.5 cm) for India, the UK, Schengen countries and many others: 413 × 531 pixels.
• 2 × 2 inches (51 × 51 mm) for US passports and visas: 600 × 600 pixels. The US online visa form accepts square images from 600 × 600 to 1200 × 1200 pixels.
• 50 × 70 mm for Canada: 591 × 827 pixels.
• Exam and job forms usually state their own pixels, such as 200 × 230, and a KB range. Use those numbers exactly, then bring the file inside the range with Photo 50 KB to 100 KB or Compress to Size.
• Want the crop, a plain white background and the pixel size in one step? The Passport Photo Maker has presets for India, the US and Schengen. Our passport photo size in pixels guide lists more countries.

Making images bigger

You can type dimensions up to 10,000 pixels, and the percentage slider goes to 200 percent, but enlarging this way only spreads the existing pixels over a bigger area, so the result looks soft. The resizer is at its best when making images smaller. When you need a genuinely larger, sharper picture, use the AI Image Upscaler, which predicts new detail, and then fine-tune the exact size here.

Before you resize

• Keep the original; resizing down throws away pixels for good.
• Know the target in pixels, not only in centimetres or KB.
• Check that the photo's shape matches the target, or crop it first.
• This tool handles one image at a time. Bulk Compress reduces the file size of many images, but it keeps their dimensions.
• Need a different format afterwards? Use PNG to JPG or JPG to PNG.

Related guides

• How to Resize Images Without Losing Quality
• Photo and Signature Size for Online Forms: KB, Pixels and Format
• What Is Image Resolution? Pixels, DPI and PPI Explained Simply