Resize Image
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Resize Image, free and private
Make a photo smaller for email, a website or an upload form, or give it exact pixel dimensions for a print or a post. Width and height stay in proportion unless you unlock them. Your photos are edited on your device and never uploaded.
How to resize Image4 steps, all on your device
- Bring in the image. Drag it onto the workspace, paste a screenshot, or open it from your files or camera roll.
- Set the new size. In Resize, type a width or height in pixels, or a percentage. With the lock on, the other side follows so nothing gets stretched.
- Or change the canvas. Canvas size adds or trims space around the picture without scaling it. One of nine anchor points decides which sides grow or shrink.
- Check the size and download. In Export, pick the format and quality. The estimate comes from encoding the real file, so you know whether it fits a size limit before saving.
Pixels, file size and keeping it sharp
Pixel dimensions and file size are linked but not the same thing. Halving the width and height leaves a quarter of the pixels, which usually cuts the file a lot, yet the format and quality setting matter just as much: a large JPEG at a modest quality can weigh less than a much smaller PNG of the same scene, because PNG never throws detail away. If a form wants a file under a certain number of kilobytes, try lowering the JPEG or WebP quality before shrinking the picture any further.
Going smaller is safe: neighbouring pixels are combined into fewer ones, and detail stays crisp at the new size. Going bigger is different. Enlarging can only spread the existing pixels further apart and blend between them, so a 600-pixel image stretched to 2400 looks soft. No resizer can recover detail the camera never captured, so always start from the largest original you have.
Leave the aspect lock on unless you truly want a new shape. Typing 1080 × 1080 for a 4:3 photo with the lock off squashes people sideways. To reach a different shape without distortion, crop to that ratio first and resize afterwards.
Canvas size is for adding room, not for scaling. Use it to put a plain border around a picture, make space above it for a heading, or extend a portrait into a square. The anchor decides where the new space goes: the centre point spreads it evenly, while the top-left point puts it all on the right and bottom.
For print, pixels per inch is what counts. At 300 ppi, a usual target for photo prints, a full A4 page needs about 2480 × 3508 pixels; at 150 ppi it needs half that in each direction. Divide the pixel width by the print width in inches to see what your photo can manage.
Good to know
- A4 paper measures 210 × 297 mm. At 300 pixels per inch (25.4 mm) that is about 2480 × 3508 pixels, the size of this editor’s A4 preset. Source: ISO 216:2007, writing paper and certain classes of printed matter
- Instagram sizes a photo wider than 1080 pixels down to 1080, and enlarges one narrower than 320 pixels up to 320, so a feed photo gains nothing from extra width. Source: Instagram Help Center: Image resolution of photos you share on Instagram
- A custom YouTube thumbnail sent from a phone must stay under 2 MB (50 MB from a computer) and be at least 640 pixels wide. Source: YouTube Help: Add video thumbnails
Frequently Asked Questions
How do I get an image under a certain size in KB?
Set the pixel size first, then open Export and lower the JPEG or WebP quality while watching the size estimate. Because the estimate is made by actually encoding your image, the downloaded file comes out at the size shown.
Will resizing make my photo blurry?
Shrinking keeps it sharp at its new size. Enlarging past the original pixel count softens it, since the new pixels are blended from existing ones. If you need a bigger file, enlarge modestly and view it at the size it will really be used.
What is the difference between image size and canvas size?
Image size scales everything: the photo, its text and its shapes all get bigger or smaller together. Canvas size changes only the area around them, adding empty room or trimming the edges, and leaves the content at its current scale.
Can I resize by percentage?
Yes. Switch to percent and type 50 to halve both sides, or 25 for a quarter. Export also has its own output width and height, handy when you want to keep the project large and save a smaller copy alongside it.