Step-by-step guides for the Image tools, grouped by task. Follow along right in your browser, with nothing to install or upload.
Size
- How to reduce image file size (JPG and PNG)Shrink phone photos and screenshots while keeping them looking the same. How JPG and PNG shrink differently, and when to use WebP.
- How to resize an image (change its pixel size)Change the width and height of photos by percentage or in pixels. How to make many images the same size, the difference between keeping the aspect ratio and an exact size, and how size affects file size.
Convert
Edit
- How to stitch long screenshots into one imageWhen you capture a chat or a long page in several screenshots, here is how to join them into one long image. Learn how overlapping parts are removed, how to take screenshots that join well, and which format to choose or when to split.
- How to straighten a photo and crop it to any aspect ratioHow to level a tilted photo and crop it to the ratio of where you post it, such as 1:1, 4:5 or 16:9. Learn why straightening trims the edges, why some photos appear sideways, and how to choose a ratio.
- How to hide personal info in a photo (choosing mosaic, blur or black out)Which to choose when hiding license plates, phone numbers or faces in a photo, why blur and fine mosaic can be recovered, and what to check before you post the hidden photo.
Photo
- How to fit a photo to Korean passport and ID card sizeThe size (35×45 mm) and head length (32–36 mm) rules for Korean passport and resident ID photos, how to make the 413×531 pixel file for online applications, and what to watch when taking the photo at home.
- How to check and remove location data (EXIF) from photosPhone photos carry the latitude and longitude where they were taken, along with the date and device. Learn what is stored, when it travels with the file, how to check and remove it, and how to stop saving it.