First, compress the image, and if it is still large, reduce the long side to about 1600 to 2000px. For photos, JPEG or WebP are easier to use, and it is safe to keep the originals separately.
why can't i send a photo
Due to the high resolution of smartphone photos, each photo can be several MB. Emails and inquiry forms have a maximum attachment capacity, which can easily be exceeded if you select multiple attachments.
The unit of capacity is 1MB, which is approximately 1000KB. If you specify "less than 5MB", the standard is that the total does not exceed 5000KB. Because there are errors in the display, leave a little leeway rather than just at the upper limit.
Order to reduce weight while maintaining image quality
At first, adjust only the compression ratio. If you try starting from 70 to 85% while still being able to read text and details, you may notice a significant reduction in capacity while maintaining the appearance.
If it is still heavy, reduce the vertical and horizontal size of the image. For viewing on a screen, it is often sufficient to make a photo with several thousand pixels to 1600 to 2000px on the long side. If you plan to print an image, check the required resolution before reducing it.
- Do not overwrite the original
- First, check the compression result with one image.
- If you have multiple sheets, check the total capacity as well.
How do you choose JPEG, PNG, and WebP?
For photos taken with a camera, JPEG is easier to handle, and WebP may be even lighter. PNG is suitable for logos, diagrams, and images with transparent parts, but photos tend to take up a lot of space.
If the destination has specified a format, that format will take precedence. JPEG is safe for email attachments that do not specify a format.
Places to look before sending
Open the saved image once and enlarge it to see the face, text, scratches on the product, and other parts you want to show to the other person. Rather than leaving the file name as "IMG_1234," it would be helpful to use a name that indicates the contents and order.
Processing conditions confirmed with current tools
Confirmed on August 23, 2026 based on publicly available implementation and automated testing. The difference in capacity due to compression rate varies depending on the image content and browser, so a fixed reduction rate is not guaranteed.
4 points before sending
- ✓Marginally smaller than the specified capacity
- ✓Can read necessary characters and details
- ✓The image is in the specified format
- ✓The original high-resolution image was saved separately.
image compression
You can select an image and save it while comparing the size and appearance after compression.
image compression→This article gives general guidance. If a recipient, printer or official service provides its own requirements, follow those requirements first.
A SMALL NOTE FROM SPACEAlthough the photos may be lighter, they will never be as heavy as the memories. Deliver only what you need, neatly.