Why convert images before sending or posting?
Convert images first because email and social platforms penalize heavy files — through clipping, slow loads, and aggressive re-compression. Handing them a clean, correctly sized JPEG gives you the best final result you can control.
You can't change how Gmail or Instagram process images, but you can give them the best possible starting file. That's the difference between a crisp newsletter photo and a blurry, slow-loading one.
How to prepare images for email newsletters
For newsletters, convert photos to JPEG, compress to around 80%, and keep each image well under 1MB. Email clients load images over potentially slow connections, and Gmail clips messages that get too large — so lightness matters more here than almost anywhere.
- Use JPEG for photos, PNG only for your logo.
- Resize to the width your email template displays (usually 600px).
- Compress so each image is a few hundred KB at most.
| Channel | Format | Recommended size |
|---|---|---|
| Email newsletter | JPEG | 600px wide, <500KB |
| Instagram portrait | JPEG | 1080×1350 |
| Instagram square | JPEG | 1080×1080 |
| Facebook / X post | JPEG | 1200×630 |
How to prepare images for social media
Upload JPEG at each platform's native dimensions so its automatic compression has minimal work to do. Every major social platform re-encodes your upload; starting correct means the re-compression degrades your image far less.
For Instagram, that's 1080×1350 for portrait posts and 1080×1080 for square. For most platforms, a properly sized JPEG at 80–90% quality survives re-compression noticeably better than an oversized PNG.
Why does social media ruin my image quality?
Social platforms re-compress every image to save bandwidth, and that compression is harsher on files that are oversized or in the wrong aspect ratio. When you upload a 6000px image, the platform aggressively shrinks it, often producing visible softness.
The fix is to do the resizing yourself, cleanly, before uploading — then the platform has less to alter. A pre-sized JPEG at the exact target dimensions is your best defense against social-media compression artifacts.
A simple pre-publish checklist
Before any image goes into an email or social post: convert to JPEG, resize to the platform spec, compress to 80%, and check the file is light. This 30-second routine protects your image quality across every channel.
The converter lets you batch this — drop in all your images for a campaign, set the size and quality once, and download the whole set ready to publish.