Is it the same as Photoshop Curves?

Yes. RGB composite plus red, green and blue channels, the same Ctrl+M shortcut, and Photoshop .acv curve preset files can be imported and used directly.

What if I do not know how to pull curves?

Use a preset. Ten are built in — apply one with a click and fine-tune from there. If you only want a one-click look, the filters page suits you better.

Can I change it back afterwards?

Yes. Curves is a non-destructive adjustment layer: the original pixels are untouched, the settings stay, and you can reopen them or delete the whole layer whenever you like.

Is my image uploaded? Do I need an account?

Nothing is uploaded — it all runs in your own browser. Free, no sign-up, no usage limit.

Curves

Per-channel, 10 presets, opens .acv. Local processing, nothing uploaded.

Use it online now

Drop an image in and pull the curve — down on the left darkens, up on the right brightens, live.

The horizontal axis is the original brightness, the vertical is what it becomes; bend the line into an S and you have added contrast. Besides the RGB composite, the red, green and blue channels can each be pulled separately — the most direct way to fix a colour cast. There are 10 built-in presets (Increase Contrast, Strong Contrast, Cross Process, Colour Negative, Invert and more): apply one, then fine-tune from there. The Ctrl+M shortcut matches Photoshop, and Photoshop .acv curve preset files open directly. Curves runs as a non-destructive adjustment layer — the original pixels are untouched and the settings stay editable or deletable. It all runs in your own browser; the image is never uploaded.

Key features

Per-channel curves

Beyond the RGB composite, pull red, green and blue separately — the direct fix for a colour cast.

10 presets

Increase Contrast, Cross Process, Colour Negative and more — apply one, then fine-tune.

Opens .acv files

Photoshop curve presets load straight in; no need to redraw them.

Non-destructive

It is an adjustment layer: original pixels untouched, settings editable or deletable at any time.

How to use

1
Add an image

Drag it into the box, or press Ctrl+V to paste.
2
Pull the curve

Down on the left darkens, up on the right brightens; an S-shape adds contrast.
3
Switch channel for casts

Move to red, green or blue and pull that one alone to neutralise the cast.
4
Download

Save it, or carry on to Levels.

FAQ

Is it the same as Photoshop Curves?: Yes. RGB composite plus red, green and blue channels, the same Ctrl+M shortcut, and Photoshop .acv curve preset files can be imported and used directly.
What if I do not know how to pull curves?: Use a preset. Ten are built in — apply one with a click and fine-tune from there. If you only want a one-click look, the filters page suits you better.
Can I change it back afterwards?: Yes. Curves is a non-destructive adjustment layer: the original pixels are untouched, the settings stay, and you can reopen them or delete the whole layer whenever you like.
Is my image uploaded? Do I need an account?: Nothing is uploaded — it all runs in your own browser. Free, no sign-up, no usage limit.

Try Curves now

Runs fully in your browser · no install · no signup · images never uploaded

Use it online now