Increase contrast
Make darks darker and lights lighter so a flat photo pops.
How to use it
- Add your file. Drop it on the box above or tap it to pick it from your device.
- Choose and run. Set the strength if you like, then drop your pictures.
- Download. Press Download. Nothing was uploaded, so nothing is stored anywhere.
What it does
Make darks darker and lights lighter so a flat photo pops. The work is done on every pixel right in your browser, and the picture keeps its size.
When to use it
For social posts, prints, presentations or just a different mood. Try it on a copy: your original file is never changed.
Private by design
Most online tools upload your file to their servers. This one doesn't: it loads into your browser and does the work on your own phone or computer, so your files never leave it.
Questions
Is this increase contrast free?
Yes, completely free, with no account, no watermark and no daily limit.
Are my files uploaded?
No. Everything happens inside your browser on your own device. Nothing is sent to us or anyone else.
Does it work on iPhone and Android?
Yes, in Safari, Chrome and other modern browsers.