CraigyBabyJ guide
Resize an image for an upload limit
Upload forms often reject images because the file is too large or the pixel dimensions do not match the required size.
Check the required dimensions first
Some sites care about file size, some care about pixel width and height, and some care about both. Read the error message before changing the file.
Resize before lowering quality
A smaller pixel size can reduce the file dramatically while keeping the image cleaner than heavy compression alone.
Compress the resized copy
After resizing, compress or convert the copy if the file is still too large. Keep the original file until the upload succeeds.
Useful tools for this job
Use these tools when you are ready to try the workflow on your own files.