How to Compress PNG for Email Attachments (Under Size Limits Fast)
By admin · Jun 16, 2026
One of the most frustrating email experiences: you try to attach a PNG image and get an error message — "File too large." This guide shows you exactly how to compress PNG files to fit email attachment limits — fast, free, and without losing quality.
Email Attachment Size Limits
| Email Service | Attachment Limit | Recommended PNG Size |
|---|---|---|
| Gmail | 25 MB per email | Under 5 MB per image |
| Outlook / Hotmail | 20 MB per email | Under 4 MB per image |
| Yahoo Mail | 25 MB per email | Under 5 MB per image |
| Apple Mail (iCloud) | 5 MB standard | Under 2 MB per image |
| Corporate Email (Exchange) | 10 MB typical | Under 2 MB per image |
Step-by-Step: Compress PNG for Email
Step 1: Check your PNG file size
Right-click the file > Properties (Windows) or Get Info (Mac). Note the file size.
Step 2: Go to compresspngfile.com
Open in your browser — works on desktop and mobile.
Step 3: Upload your PNG
Drag and drop or click to upload. You can add up to 20 images at once if sending multiple.
Step 4: Download compressed PNG
Your compressed image is typically 70–80% smaller. A 5 MB PNG becomes around 1 MB.
Step 5: Attach to your email
Now attach the compressed PNG to your email — it should easily fit within the size limit.
How Much Will My PNG Shrink for Email?
| Original PNG Size | After Compression | Email Ready? |
|---|---|---|
| 500 KB | ~100 KB | Yes — easily |
| 2 MB | ~400 KB | Yes — easily |
| 5 MB | ~1 MB | Yes — easily |
| 10 MB | ~2 MB | Yes — easily |
| 25 MB | ~5 MB | Yes — within most limits |
Alternative: Send via Google Drive or Dropbox
If your PNG is extremely large (50 MB+) or you're sending many images, consider sharing via cloud storage:
- Upload to Google Drive or Dropbox
- Share the link in your email body
- No file size limit — recipients can download at full quality
Tips for PNG Images in Email
- Always compress PNG before attaching — even if it fits, smaller files are faster to send and receive
- For logos and branded graphics in email newsletters, keep PNG files under 500 KB
- If sending photos, consider saving as JPG instead — photos don't need PNG's lossless quality
- For images with transparent backgrounds (like logos), PNG is the right choice — JPG would add a white background
Conclusion
Compressing PNG files for email is quick and easy with compresspngfile.com. A few seconds of compression can turn a 10 MB PNG into a 2 MB file that sends instantly and loads fast for your recipient.