Photo Will Not Upload? Fix File Size, Dimensions and Format
Read the error, then fix one thing at a time. Too large in KB or MB: compress it. Wrong width or height in pixels: resize it. Wrong format, often HEIC from an iPhone: convert it to JPG. Then open the saved file and check its size before you try again.
Three different limits
Upload forms check three separate things, and photos fail for different reasons.
File size is how much space the file takes, measured in KB or MB. Dimensions are how many pixels wide and tall the image is. Format is the type of file, such as JPG, PNG, WebP or HEIC.
A photo can have small dimensions and still be a large file, or large dimensions and a small file, so fix the limit the form complains about.
File too large
Phone photos are often 3 to 8 MB, and many forms accept far less. Open Compress Image, drop the photo and set Target size to the limit, for example 50 KB, or choose Custom and type it. SleekCut finds the best quality that fits and only makes the photo smaller if it has to.
Compression is a trade off: very small files lose detail. Look at the result at full size, and if it looks blotchy, raise the quality and reduce the width instead.
Wrong dimensions
Some forms ask for an exact size, such as 600 x 600 pixels, or a minimum, such as at least 1000 pixels wide. Use Resize Image and type the width and height. Choose Crop to fill if the shape must change, or Whole photo to keep everything and fill the empty space.
Making a small photo bigger does not add detail. If a form asks for more pixels than your photo has, start from the original photo rather than a copy that was sent through a chat app.
Format not accepted
iPhones save photos as HEIC by default, and many websites and Windows computers do not accept it. Convert with HEIC to JPG, which works for almost every form.
If a form wants PNG, for example for a signature or logo with a transparent background, use Image Converter and choose PNG. Transparent areas turn white when saved as JPG.
Check before you submit
After saving, open the downloaded file and check three things: the file size in KB, the dimensions in pixels and the file type at the end of the name. SleekCut shows the format and file size on the download button.
If the form still rejects it, read the error again. Some forms also require a specific shape, a plain background or a recent photo, which no converter can fix.
Your photos stay on your device
Upload forms are often for official documents, so the photos can be sensitive. Compressing, resizing and converting in SleekCut happens in your browser, and nothing is uploaded until you choose to submit it to the form yourself.