Why PNG files fail in Gmail
PNG is lossless — great for quality, bad for email size. A single high-resolution screenshot or photo saved as PNG can be 5–15 MB. Attach several PNGs and you hit Gmail's cap fast. JPG uses efficient compression, so the same image often drops to a few hundred kilobytes.
Gmail attachment limits (quick reference)
- Direct attachment: up to 25 MB total per message
- Google Drive link: up to 10 GB (but recipient must download separately)
- Inline images: may be resized in the body but still affect load time
How to convert PNG to JPG for Gmail
- Open our PNG to JPG converter in Chrome, Safari, or Firefox.
- Click Choose PNG Image and select your file.
- Click Download JPG — the file stays on your device (never uploaded).
- In Gmail, click Attach files and select the new .jpg file.
Works on Windows, Mac, iPhone, and Android — no app store download needed.
When to keep PNG for email
Keep PNG if the image has transparent background (logos on clear backgrounds) or sharp text/UI where JPG artifacts would be visible. For plain photos, event pictures, and scans, JPG is almost always the better email format.
FAQ
What is Gmail's attachment size limit?
Gmail allows attachments up to 25 MB per email. Converting PNG to JPG is the fastest way to fit large images under that limit.
How much smaller is JPG than PNG?
For photos, JPG is often 70–90% smaller. A 10 MB PNG might become 800 KB–2 MB as JPG.
Will Gmail compress my PNG automatically?
Gmail may resize inline images, but large PNG attachments still count toward the limit. Convert to JPG before attaching for reliable results.