Resize for the web, social media, forms and print
Every destination wants images a particular size: 1080 × 1080 for Instagram posts, 1200 × 630 for link previews, 600 × 600 for many visa and exam forms, a few hundred pixels for email signatures, and exact centimetres for prints. This resize image tool handles all three ways people think about size.
Three ways to resize
Exact pixels. Enter Width (px) and Height (0 = auto). The default width is 1,200 px – a good size for websites and email. With Keep aspect ratio ticked:
- Fill in one side and leave the other at 0: the other side is calculated so nothing is stretched.
- Fill in both: the image is scaled to fit inside that box, keeping its proportions.
Untick Keep aspect ratio only when you deliberately want the exact width and height, even if the image is distorted. To get exact dimensions without distortion, crop to the right shape first with Crop Image.
Percentage. Enter a Scale (%) – 50% halves the width and height (a quarter of the pixels), 200% doubles them. Handy for quickly shrinking a batch of photos.
Print size (cm/in + DPI). Enter the physical Width and Height, choose the Unit (cm, inches or mm) and the DPI (default 300). The tool calculates the pixels needed: a 10 × 15 cm print at 300 DPI is 1,181 × 1,772 px. Use this for photo prints, documents that specify sizes in millimetres, and print shops.
Choosing a format
- Same as original – keeps JPG as JPG and PNG as PNG.
- JPG – smallest for photos, no transparency.
- PNG – lossless, keeps transparency; best for logos and screenshots.
- WebP – small files with transparency; ideal for websites.
Common sizes
| Purpose | Size |
|---|---|
| Instagram square post | 1080 × 1080 px |
| Instagram portrait | 1080 × 1350 px |
| Facebook / LinkedIn link image | 1200 × 630 px |
| YouTube thumbnail | 1280 × 720 px |
| X/Twitter header | 1500 × 500 px |
| Website full-width image | 1920 px wide |
| 4 × 6 inch print | 1200 × 1800 px at 300 DPI |
| A4 at 300 DPI | 2480 × 3508 px |
Upscaling and quality
Shrinking images keeps them sharp. Enlarging them spreads the same detail over more pixels, so text and edges get soft. If a form demands a minimum size, a modest upscale (up to about 150%) is usually acceptable.
Resize and compress
Smaller dimensions mean smaller files, but if you have a strict file-size limit (for example 200 KB), follow up with Compress Image using a target size. For iPhone photos, convert first with HEIC to JPG if the destination does not accept HEIC.
Batch resizing
Choose several images and they are all resized with the same settings. Download them one by one or together as a ZIP – ideal for product photos, galleries and real-estate listings.
Privacy
Your images are resized on your device and never uploaded. The output is re-encoded, so it does not carry the original EXIF data such as location.
Frequently asked questions
How do I resize an image without stretching it?
Keep Keep aspect ratio ticked. Enter only a width (leave height 0) and the height is calculated automatically, or enter both and the image is fitted inside that box.
How do I resize a photo to 35 × 45 mm or another print size?
Choose Print size, select mm, enter 35 and 45 and set DPI to 300. For passport photos, Passport Photo Maker also crops to the official head size.
What DPI should I use for printing?
300 DPI is the standard for photo-quality prints. 150–200 DPI is fine for posters viewed from a distance.
Can I make an image bigger?
Yes, but enlarging cannot add detail, so large upscales look soft. Keep enlargements modest.
Can I resize many images at once?
Yes. Select several images and all are resized with the same settings; download them as a ZIP.
Are my images uploaded?
No. Resizing happens in your browser.