What it does
Adjusts brightness and contrast by setting new black, white, and midtone points.
The histogram is the interface. It plots how many pixels sit at every brightness, and it diagnoses an image at a glance: a mountain range huddled in the middle with empty space at both ends is a picture using half its range, which the eye reads as haze. Pulling the black point up to where the data begins and the white point down to where it ends stretches the tones across the full range, and the flatness lifts like a window being cleaned. Almost nothing else in an editor produces as much improvement per second.
Between the endpoints sits the midtone control, gamma. It brightens or darkens the middle of the range while leaving black and white pinned, which is what separates it from a crude brightness slider that shoves the whole histogram sideways and clips whatever falls off the end. The output levels run the transformation in reverse, compressing the result into a narrower range: raising the output black point means nothing in the image ever reaches pure black, which is the matte, faded-film treatment behind half the portrait grades on any feed.
The same five handles exist for red, green, and blue individually, and that is where levels stops being correction and becomes grading. A gamma nudge on a single channel tints the midtones without touching black or white; opposing moves on two channels pull the shadows and highlights toward complementary colors. Most named film looks reduce to a few channel-level moves. The overall adjustment applies first and the per-channel moves refine on top of it, the convention Photoshop established, and on video the correction holds identically on every frame.
Signature looks
Punched contrast
Black and white points pulled in to meet the data. The haze lifts, colors deepen, and the image reads sharper without touching a blur or sharpen control.
Matte fade
Output black raised so the deepest shadow is a soft charcoal. The faded-print look that flatters skin and calms harsh footage.
Teal shadows
Per-channel moves that cool the shadows while the highlights stay honest. The first half of the teal-and-orange grade, built from levels alone.
Try it on your own footage
This effect runs live in the Modulate editor, with layers, effect chains, masks, and keyframes. Free, no signup, nothing to install.
Common questions
What does a levels adjustment do?
It remaps an image’s tonal range with five controls: an input black point and white point that decide which values become pure black and pure white, a gamma that shifts the midtones between them, and output black and white points that compress the result. Together they set contrast, brightness, and overall tonal shape, and applied to individual channels they shift color balance as well.
What is gamma in a levels adjustment?
Gamma is the midtone lever. It redistributes the values between the fixed black and white points along a curve, brightening or darkening the middle of the image while the endpoints stay put. That is why a gamma move looks natural where a plain brightness change looks washed out: nothing clips, and the extremes hold their ground.
What is the difference between levels and curves?
Levels gives you five meaningful handles: two input endpoints, a midtone gamma, and two output endpoints. Curves lets you place arbitrary control points along the whole tone curve, so it can do everything levels does plus surgical moves like lifting only the deepest shadows. Levels is faster for setting range and overall contrast; curves is finer for shaping. Many grades start with levels and finish with curves.
How do you get the faded matte film look?
Raise the output black point. Every shadow value lifts to a soft dark gray, so the image never reaches pure black, which is the signature of aged prints and of half of contemporary portrait grades. It usually pairs with a small gamma lift and a touch of grain to complete the film impression.
Can you adjust levels on video?
Yes. Levels is a per-pixel remap, so the same correction applies identically to every frame with nothing to track, and the grade can still be animated when a scene calls for it. In Modulate the levels effect runs live on images and video in the browser, with a histogram to set the points against.
Related effects
Curves adjustment
Precise tone and color control. Drag points on a curve to brighten, darken, or add contrast, overall or per channel.
Gradient map
Recolors the image by mapping its dark and light areas onto a gradient you design.
Posterize effect
Collapses smooth gradients into a few flat tonal bands for a screen-printed, cel-shaded look. Band per channel or by brightness, with a gamma bias to push the steps toward shadows or highlights.
Hue shift
Rotates every color around the color wheel, and can keep the colors cycling over time.