Darken Image Online

Upload a photo, choose a darkness level, and download — processed entirely in your browser.

Drag & drop an image here

or

No file selected

0 — original 100 — fully dark
Preview
Upload an image to see the preview
Preview of darkened image

How to darken an image

  1. Click Choose File or drag your image onto the upload area.
  2. Drag the Darkness slider to the right to increase the dark overlay.
  3. Click Download to save the darkened image.

About this tool

This tool darkens your image by blending a black overlay at the chosen opacity using the HTML5 Canvas API. Everything runs in the browser — your image is never sent to any server. It supports JPEG, PNG, WebP, and GIF files. Common uses include creating dark backgrounds for text overlays, reducing glare in bright photos, or preparing images for UI mockups.