Faster Sending
Smaller attachments send instantly and avoid provider file-size limits (often 10MB per message).
Compress Images for Email
Large photos make emails slow to send and hard to deliver. Shrink your JPG and PNG images for email in seconds — locally in your browser, with no upload and no size limits on our side.
Last updated: August 6, 2026
Why Choose Image Toolkit
Better Deliverability
Oversized emails can be rejected by recipient servers. Compressed images help your message land in the inbox.
One Tool for JPG & PNG
Compress both formats with quality controls; PNG photos can be converted to JPEG for maximum savings.
How to Use
- 1
Upload an image
Click the upload area or drag & drop a JPG/PNG image onto the page.
- 2
Choose compression quality
High quality (near-lossless), Balanced (best for web), or Maximum compression (smallest size).
- 3
Download the result
Compare the file size and savings percentage, then download with one click.
Email providers impose hard limits on attachment size — typically 10MB per message — and large images are the most common reason emails get rejected or fail to send. Compressing your photos before attaching them solves the problem in seconds.
Why image size matters for email
- Send speed: A 5MB photo uploads much slower than a 300KB one.
- Delivery rates: Many recipient servers reject messages that exceed their size limits.
- Mobile users: Smaller attachments load faster on phones and cost less mobile data.
How to compress an image for email
- Upload your JPG or PNG image.
- Choose Balanced for good quality, or Maximum for the smallest file.
- Download the compressed image and attach it to your email.
Your images stay on your device the whole time — nothing is uploaded, nothing is stored, and no account is required.
Frequently Asked Questions
What image size is best for email?
Keep attachments under 1MB per image, and ideally under 500KB. Most email providers cap messages at 10MB total, so compressing images keeps shared photos quick to send and receive.
Does compressing an image for email ruin its quality?
The Balanced quality level keeps photos looking great on screens while cutting file size dramatically. Maximum compression is available when size matters more than detail.
Is this really private?
Yes. All processing happens locally in your browser using the Canvas API. Your photos are never uploaded to any server.