Tom is a general contractor. He spends most of his day on job sites, not in front of a computer. When he needs to send photos to a client — progress updates, material options, before-and-after shots — he takes them on his phone and tries to email them. Simple, right? Except it wasn't, because Tom was regularly sending 5 to 8 photos at once and hitting Gmail's 25MB attachment limit with the reliability of a freight train hitting a wall.
For months, his workaround was "send fewer photos per email." This led to a client receiving a project update split across seven separate emails, which led to a confused client, which led to a mildly awkward phone call, which led to Tom Googling "how to make photo smaller for email" at 7 AM in a truck.
The Problem
Modern smartphones take excellent photos — often too excellent, in the sense that each photo can be 4 to 12MB. That's great for printing and terrible for email. Gmail's attachment limit is 25MB total per message. Three high-resolution iPhone photos can hit that ceiling without any effort at all.
Tom's phone was also saving photos in HEIC format (Apple's default), which some clients couldn't even open on their Windows laptops — leading to a whole separate problem on top of the file size issue. He'd been copying photos to his computer, "exporting" them, attaching them, and still running into issues. Each photo he exported from his iPhone through iTunes (yes, he still does it that way) was landing at 7–9MB as a JPEG.
His clients were not thrilled. One of them asked if he could "just send smaller files." This request baffled Tom until he figured out what it actually meant.
The Fix
Tom's office manager found jpeg-optimizer.net and showed him the workflow: take photos, transfer to laptop, drag into the compressor, download compressed files, attach and send. His 7MB photos were coming out at 400–600KB — small enough to send a full set of eight job-site photos in a single email with plenty of room to spare.
His clients could now open the images on any device, in any email client, without downloading a separate app or scratching their heads over an unfamiliar file format. His HEIC issue also went away once he started using the HEIC to JPG converter as part of his send process.
He now sends all project photos in one email, every time. His clients say communication has improved. Tom says the difference is "night and day." His office manager says Tom now describes himself as "good at computers," which is a generous self-assessment but broadly in the right direction.
Why Compressed Images Work Better in Email
- Reduce image size below Gmail's 25MB attachment cap — fit more photos in each email
- Recipients open smaller attachments faster, especially on mobile
- Free image compressor — no subscription, no watermarks, no complexity
- JPEG format works in every email client on every device
- Compressed JPEGs still look perfectly sharp on any screen
- No software installation — use it from any computer or phone browser
The Bigger Picture on Image Sizes for Email
If you regularly send images by email — whether you're a contractor, a real estate agent sending property photos, a teacher sharing class photos, or literally anyone else — understanding file sizes for email is genuinely useful. Our guide on what is a good image file size for email attachments gives concrete numbers and recommendations.
For newsletters and marketing emails, the standards are different — images embedded in email campaigns have their own sizing best practices. If that's relevant to you, check out how to optimize images for email for the full breakdown.
And if you're an iPhone user who didn't know HEIC was causing problems — you're far from alone. The HEIC vs JPG comparison is worth a read if you're regularly sharing photos with people who don't use Apple devices.
Suggested image: A laptop screen showing a failed email bounce notification "Attachment exceeds size limit", next to a phone displaying a job site photo.