How to Optimize Your Campaign Images on OptinMonster?

OptinMonster compresses new uploads automatically with Kraken.io. That has been true since June 2020. Official page: How to Optimize Your Campaign Images. Images uploaded before that date were not backfilled.
You still pick dimensions. Templates are usually 550–750px wide on desktop and 300–400px on mobile. Height follows the content. For retina, double the displayed size (a 600px-wide campaign wants a 1200px-wide image). Keep the file under 2MB.
Supported formats: JPG, JPEG, GIF, PNG, WebP, SVG.
1. In Design, select the image (or drop an Image block).

2. Open the image picker. Your Images is the account library. Unsplash is the built-in stock search.

3. Select from Computer to upload. Compression runs on the way in.

4. Save.
Exit-Intent and MonsterLinks preload images. That can still cost performance even after compression. OptinMonster documents an Api.js switch to disable preload. It also disables webfont preload. There is no separate toggle.
Help index: OptinMonster help.
Written and reviewed by

SEO Executive at Flatart
Emel Dalabasmaz graduated in Advertising and Public Relations from Anadolu University. She began in social media and carried that grounding — content, brand communication and performance — into SEO. For more than ten years she has worked on growth for brands across a range of industries, pairing a communications perspective with data and technical analysis to build a digital presence that holds up over time.
- Education
- Advertising and Public Relations, Anadolu University
- Writes about
- Popup builders, Conversion rate optimization, On-site messaging, SaaS pricing research, SEO, Technical SEO, Content strategy, Digital marketing

