A before/after slider that outlives every plugin

Drop in a before photo and an after photo, drag the divider to preview, then export one self-contained HTML file with both images baked in as data URIs. No plugin, no CDN call, no account — paste it anywhere.

Before photo

Click or drop the before photo

After photo

Click or drop the after photo

"Before" label

"After" label

Both photos are read locally and baked into the exported file as data URIs — nothing is uploaded, and the exported comparison works offline forever with no script or CDN dependency. The paid download adds the desktop app with a slider-style library (line, circle, fade), batch export for whole galleries and WordPress-ready embed snippets.

What is this page?

This is the real Before / After Slider Generator — the same tool Untracked sells as a download — running free, right here in your browser. Everything is processed entirely on your own device: nothing is uploaded, no account is needed, and the page makes no network requests after it loads. You can verify that yourself: load the page, open your browser's network inspector, or even disconnect from the internet and keep using it.

Free page vs. the €4.50 download

Here (free): unlimited comparisons, drag preview, one self-contained export file each — images baked in.

The download (€4.50, once): the same generator as a single HTML file you own — slider style library (line, circle, fade), batch export for galleries and WordPress embed snippets. Plus the commercial-use licence. Full details →

Questions people ask

What exactly do I get when I export?

One HTML file with both photos embedded as data URIs and a tiny built-in drag script. No external script, no CDN call, no account — paste it into any page or send it as-is and it works offline forever.

Will it work in my website builder?

Anywhere you can paste HTML — WordPress, Squarespace code blocks, Ghost, a plain page. If your builder strips