Most tools are either:

• Desktop-only (hello, Photoshop)

• Overkill

• Full of ads and watermarks

• Or just… slow

I built Combine Images to solve that problem in the simplest way possible.

🛠️ Why I Built It

I'm a product manager and part-time builder. I often need to:

• Combine mobile UI screenshots for feature proposals

• Make long vertical scroll images for documentation

• Create “before and after” grids for product showcases

Doing this manually in design tools felt heavy and slow. I just wanted something:

• Lightweight

• Instant

• Private (runs locally, no uploads)

• With a clean export

So I built one.

💡 How It Works

Combine Images is a client-side web app. That means:

• No images are uploaded to any server

• All processing happens in your browser

• You can use it offline after the first load (thanks to service workers)

Key features:

• Horizontal / Vertical / Grid layout options

• Adjustable spacing and background color

• Drag & drop support

• Exports as PNG

No login. No watermark. No ads.

⚙️ Tech Stack

It’s built with:

• Vanilla JS + HTML5 canvas for rendering

• Parcel for bundling

• A sprinkle of Tailwind CSS for UI

• Hosted on Cloudflare Pages

I'm deliberately keeping it framework-free to make it snappy and keep the bundle size under control.

🔗 Try It Out

If you ever need to quickly combine a few images (screenshots, app UIs, flow charts), give it a try:

👉 https://combineimages.online

It’s totally free and open to feedback.

🤔 What’s Next?

A few features I’m considering:

• Output to PDF

• Grid layout with fixed rows/columns

• Mobile-first UI improvements

• Image annotation or arrows?

If you have suggestions or want to fork it into something better, I'd love to chat!

✍️ Final Thoughts

This was one of those weekend projects that actually solved a real problem I had — and it’s been fun seeing it become a part of my own daily workflow.

If you're building small tools like this, or using simple utilities to improve your dev or product workflows, I'd love to hear what works for you.

Drop your favorite “tiny web tools” in the comments 👇