Create a collage: upload photos, pick your layout and output size, then download—private and client-side.
The Photo Collage Builder by ConvertResize.com is a fast, free tool for creating beautiful photo collages right in your browser. No registration, no watermarks, and no hidden fees—just upload your pictures and start designing.
Our collage maker is designed for maximum privacy: all processing happens locally in your browser, so your images never leave your device. Whether you’re making Instagram posts, Facebook collages, or custom layouts, you have complete control over your files.
With flexible grid layouts, instant drag-and-drop uploading, and support for all major image formats, this tool is perfect for social media sharing, school projects, event invitations, and much more. It works seamlessly on desktops, laptops, tablets, and smartphones.
Yes! This collage maker works 100% client-side. Once loaded, you can use it without an internet connection.
Will my images ever leave my device?No, all processing is done in your browser. Your photos never leave your computer, tablet, or phone.
What formats are supported?You can upload JPG, PNG, WebP, and other common image files. Download your finished collage as PNG or JPG.
Can I use this for Instagram, Facebook, or YouTube?Yes! Use the built-in size presets for instant social-ready collages for Instagram posts, Facebook, YouTube thumbnails, and more.
Images not showing up? Double-check that you’re uploading supported image formats like JPG, PNG, or WebP.
Nothing happens after uploading? Try refreshing the page or using a different web browser. Sometimes browser extensions or privacy settings may block file access.
Downloaded collage looks blank? Ensure you’ve added images and selected a grid layout before clicking “Download Collage.”
Can’t drag and drop on mobile? On some phones, drag-and-drop isn’t supported—use the “Choose Files” button instead.
Still stuck? Clear your browser cache or contact us using the link in the footer for more help.