Compress Image for Email
Compress images to fit email attachment limits. Reduce file size for Gmail, Outlook, Yahoo. Free, no upload, instant.
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Drop image here or click to upload
Supports PNG, JPEG, WebP, HEIC
What to Expect
When to Compress to Under 1MB
Compress images for Email — meet platform upload limits, share photos faster, and save storage space.
Format Tips for Under 1MB
Gmail caps attachments at 25MB. To send 10-20 images in one email, compress each to 200KB-500KB.
💡 Pro Tip: Gmail caps attachments at 25MB. To send 10-20 images in one email, compress each to 200KB-500KB.
Learn More About Image Optimization
Want to dive deeper into image compression? Check out these authoritative resources:
Why Choose CompressNow?
100% Private
All compression happens in your browser. Your images never leave your device.
No File Limits
Compress as many images as you want. No daily limits, no registration required.
Exact File Size
Get precise file size control. Hit your target size every time.
How to Compress Images to Under 1MB
Upload Your Image
Drag and drop your image or click to browse. Supports PNG, JPEG, WebP, and HEIC formats up to 25MB.
Set Target Size
Choose your desired file size or quality level. Our smart algorithm will optimize automatically.
Download Compressed
Preview the result and download your compressed image. It's that simple!
[GUIDE] New to image compression? Read our Complete Guide to Image Compression — learn how to choose the right format, size, and quality for any use case.
Frequently Asked Questions
What's the email attachment size limit?
Gmail: 25MB. Outlook: 20MB. Yahoo: 25MB.
Can I compress multiple images for one email?
Yes. Upload multiple images and the tool compresses them one by one.