QiLing Tools📈Curves Adjustment Online - Adjust Images with RGB Curves
Curves are the most flexible tool in professional editing: the horizontal axis is the original brightness and the vertical axis the adjusted brightness. Lift the middle to brighten mid-tones, make an S-shape to deepen shadows and brighten highlights for punchy contrast, or raise the bottom-left point for a faded film black. Beyond the RGB master curve you can edit the red, green and blue channels separately to shift tones — lifting blue in the shadows and lowering it in the highlights is a classic vintage look. The editor shows the channel's histogram, and curves use monotone cubic interpolation so they stay smooth without overshooting. Apply the same curves to a whole batch of photos.
Free · No sign-up · Runs in your browserLast updated:
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How to use Curves Adjustment
- 1Drop in one or more images
- 2Pick a channel and drag, add or double-click to remove points, or choose a preset
- 3Click Apply curves when the preview looks right, then download
FAQ
- How do I delete a point?
- Double-click it. The two end points can't be deleted but can be dragged up and down.
- How are curves different from brightness and contrast?
- Brightness and contrast adjust the whole image uniformly. Curves can target a specific tonal range — such as lifting shadows without touching highlights — and work per channel for finer control.
- Are my files uploaded?
- No. Everything runs locally in your browser with no network upload, and is discarded when you close the page.
- Do I need to sign up or pay?
- No. The site is completely free, needs no account, has no usage limits and adds no watermark.