Email services impose attachment size limits that make image compression essential. Gmail allows 25MB total, Outlook allows 20MB, and many corporate email servers limit attachments to 10MB or less. Compressing images before attaching them ensures successful delivery.
For email, the ideal approach depends on your purpose. Professional photos for review should be compressed to 500KB-1MB each at 85% quality. Quick reference images can be 100-200KB at 75% quality. Email signature images should be under 50KB.
With ImgTools, upload your image and use the Compress tab to reduce file size. For email, JPEG format provides the best compression for photographs. If you are sending multiple images, consider resizing them to 1200x900 or smaller before compressing.
Most email recipients view images on screens, not print, so web-optimized dimensions (1200px on the longest side) are more than sufficient. Sending original camera files (often 5-10MB each) is wasteful and may cause delivery failures.
ImgTools processes everything locally. Your private photos and documents are never uploaded to any server, making it safe to compress sensitive content before emailing.