Compress Image for Email
Reduce photo file size to fit email attachment limits. Works locally on your device — no uploads, no sign-up required.
Compress for Email
You'll save up to 4.2MB
We'll compress your photo to fit Gmail's 25MB limit. Estimated output: 800KB-1.2MB from the original 5MB.
Note: Set a target size in KB to match your email provider's limits
Email Attachment Size Limits
Know your limits before you send. Here are the attachment size limits for popular email providers.
| Email Provider | Attachment Limit | Recommended Image Size |
|---|---|---|
| Gmail | 25 MB | Under 5 MB per image |
| Outlook / Hotmail | 20 MB | Under 4 MB per image |
| Yahoo Mail | 25 MB | Under 5 MB per image |
| Apple iCloud Mail | 20 MB | Under 4 MB per image |
| ProtonMail | 25 MB | Under 5 MB per image |
| AOL Mail | 25 MB | Under 5 MB per image |
These limits apply to total attachment size. If sending 5 photos, each should be under 5MB to stay within a 25MB limit.
How It Works
Download & Install
Takes just 30 seconds. No account, no credit card required.
Browse & Select Your Images (JPEG, PNG, WebP, HEIC)
Navigate your files like a regular file browser. Batch processing supported.
Get Email-Ready Images (Instant)
Processing happens locally on your computer. No upload wait.
How Diwadi Compares to Alternatives
Most compressors are generic. Diwadi is built for the email workflow.
| Feature | Diwadi | iLoveIMG | Img2Go | TinyPNG | Compressnow | macOS Preview |
|---|---|---|---|---|---|---|
| Target Size (KB) | Yes | No | % only | No | No | Quality % |
| Works Offline | Yes | No | No | No | No | Yes |
| Privacy | Local processing | Cloud upload | Cloud upload | Cloud upload | Cloud upload | Local |
| Batch Compress | Unlimited | Limited | Limited | Limited | 10 max | No |
| Price | Free | Free (limited) | Free (limited) | Free (limited) | Free | Free |
| Email-Specific | Yes | No | No | No | No | No |
Why Diwadi for Email Attachments
Target Size Compression
Set an exact file size in KB to match email attachment limits. Compress to 100KB, 500KB, or any target.
100% Local Processing
Photos never leave your device. No cloud uploads of personal images — family photos, ID documents, and work files stay private.
Batch Compression
Compress multiple photos at once for a single email. Select 5, 10, or 50 images and compress them all together.
Quality Control
Adjust compression quality to balance file size and image clarity. See the estimated output size before compressing.
Multiple Formats
Compress JPEG, PNG, WebP, and HEIC images. Works with photos from iPhone, Android, and cameras.
Free to Use
No subscription, no sign-up. Available on Mac and Windows.
Who Uses This
Diwadi helps professionals and everyday users send images via email without bounced messages.
Office Workers
Compress screenshots and photos for email reports and attachments.
Sales Teams
Send product images and proposals without bounced emails.
Job Applicants
Compress resume photos and portfolio images for application emails.
Family & Friends
Share vacation photos via email without exceeding limits.
Why Diwadi Over Other Options
vs Online Compressors
- No uploading personal photos to servers
- Works completely offline
- No file size upload limits
- No ads or cookie popups
vs macOS Preview / Paint
- Target size in KB (not just quality %)
- Batch compression for multiple photos
- Visual quality comparison
- Multiple output format options
vs Email Provider Compression
- You control the quality level
- No surprise quality loss
- Works before hitting send
- Consistent results across providers
vs Cloud Storage Links
- Recipient gets the actual image
- No expired links or access issues
- Works for formal email contexts
- No dependency on third-party services
Frequently Asked Questions
How do I compress an image for email?
Open Diwadi, drag and drop your image, and set a target file size or quality level. The compressed image is saved locally on your computer, ready to attach to your email. No upload, no waiting — compression happens instantly on your device.
What is the maximum email attachment size for Gmail?
Gmail allows attachments up to 25MB total. If you're sending multiple images, keep each image under 5MB to stay within the limit. Diwadi can compress photos to any target size, making it easy to fit Gmail's requirements.
Can I compress images to a specific file size (e.g., 100KB, 50KB)?
Yes. Diwadi lets you set a target file size in KB. Need an image under 100KB for a form upload? Set 100KB as your target. Need a 50KB passport photo? Set 50KB. Diwadi adjusts quality automatically to hit your target size.
How do I compress multiple photos for one email?
Drag and drop all your photos into Diwadi at once. Set your compression settings (quality or target size), and all images are compressed together. No need to process one at a time like online tools.
Does compressing an image reduce its quality?
Compression trades file size for quality. At 80-90% quality, most people cannot see any difference. At 60-75%, there may be minor artifacts on close inspection. Diwadi shows you the estimated output size, so you can adjust quality until you find the right balance for your email.
What image format is best for email attachments?
JPEG is the best format for email. It compresses well, is universally supported, and works on every device. PNG is larger and best reserved for images that need transparency. Diwadi can compress JPEG, PNG, WebP, and HEIC files.
Can I compress images for email without uploading to a website?
Yes. Diwadi is a desktop app that processes images locally on your computer. Your photos never leave your device — no cloud uploads, no privacy concerns. This is especially important for personal photos, ID documents, and sensitive work images.
Is the image compressor free?
Yes. Diwadi is free with no limits on file count or file size. Compress unlimited images without watermarks, subscriptions, or credit cards. Available for Mac and Windows.
What is the recommended image size for email?
Keep individual images under 5MB for most email providers. For formal emails or recipients with older email systems, 1-2MB per image is safer. If you're sending multiple photos, divide your provider's limit by the number of images (e.g., 25MB ÷ 5 photos = 5MB each).
How do I compress iPhone photos for email?
iPhone photos are often 2-8MB each in HEIC format. Transfer photos to your Mac or Windows computer via AirDrop, iCloud, or cable. Open them in Diwadi, set a target size (e.g., 1MB), and compress. Diwadi supports HEIC format natively.
Does Outlook compress images automatically?
Outlook offers to resize images when you attach large photos, but you have limited control over quality. Compressing with Diwadi before attaching gives you precise control over file size and quality, ensuring consistent results.
What platforms does the compressor run on?
Diwadi runs on macOS (Intel and Apple Silicon), Windows 10/11. Download the version for your operating system and start compressing images in 30 seconds.
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Learn More
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Image Optimization Guide
Best practices for compressing images without losing quality
TinyPNG vs Diwadi
How Diwadi compares to the most popular online compressor
Desktop vs Online Compressors
Why local tools are faster and more private
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Quick fixes for oversized images in email and web
Compress Images for Email — Free, Local, No Uploads
Download Diwadi and start compressing photos for email attachments. Target any file size. Available for Mac and Windows.
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