Image too large to upload? Make it smaller on Mac
Check whether the limit is the file size (MB) or the dimensions (pixels), then make a smaller copy. For file size, right-click the photo in Finder and choose FileMate › Compress Image; the result shows the new size, and Stronger or Maximum go further. For exact pixel dimensions, use Preview’s Tools › Adjust Size. iPhone HEIC photos may also need converting to JPEG first.
The photo is made smaller on your Mac. Only the finished copy gets uploaded.
Get the photo under the limit with FileMate
- Right-click the photo in Finder and choose FileMate › Compress Image.
- Compare the size in the result with the form’s limit.
- Still over? Click Want a smaller file? and try Stronger, then Maximum.
- Upload the compressed copy. The original stays full size.
MB or pixels? Read the message
| The form says | It means | Fix |
|---|---|---|
| “Maximum file size 2 MB” | File size | Compress Image |
| “Image must be under 5000 KB” | File size (about 5 MB) | Compress Image |
| “Maximum 2000 × 2000 px” | Dimensions | Resize in Preview to that size or less |
| “Minimum 600 × 600 px” | Dimensions, the other way | Don’t shrink below it |
| “Only JPG or PNG” | Format, not size | Convert to JPEG |
Common upload limits
Profile photos and forum avatars often allow 1 to 5 MB. Job portals, school systems and government forms commonly allow 2 to 10 MB per file. Online shops and listing sites often allow 10 to 20 MB but recommend less. A current iPhone photo is often 2 to 5 MB, and 48-megapixel shots considerably more.
Why phone photos trip these limits
Phone cameras save photos at their full resolution and high quality, because storage is cheap and you might print them. An upload form usually shows the photo at a few hundred pixels wide. Reducing the quality slightly and, if needed, the dimensions loses nothing you’d see in that context.
With Preview
- Open the photo in Preview.
- For dimensions: Tools › Adjust Size, enter a width, click OK.
- For file size: File › Export, choose JPEG, drag the Quality slider while watching the size.
- Save under a new name.
Get FileMate
The form sets the limit. FileMate makes the photo fit from Finder, on your Mac, without sending it to another website first.
Normal price €9.99, now €4.99 incl. VAT
One payment, no subscription. macOS 14 Sonoma or later, Apple silicon or Intel.