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Levels Tool
Set the black, mid and white points, tune gamma and watch a live histogram update as you drag.
Adjust levels
Histogram of the current output
Range: —
How to use the Levels Tool
- Load the photo whose tones you want to stretch.
- Drag the black, mid and white sliders and fine tune with the gamma control.
- Watch the live histogram, then download the adjusted image as a PNG.
Features
- Black, mid and white point sliders
- Separate gamma adjustment for midtones
- Live 256 bin histogram of the output
- Client side processing with no uploads
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Frequently Asked Questions
Common questions about the free online levels tool.
Every pixel darker than the black point is pushed to pure black, which deepens shadows and
increases overall contrast in the image.
Every pixel brighter than the white point becomes pure white, which brightens highlights and
can rescue a flat or hazy photo.
The mid point sets which input tone becomes middle grey. Pulling it left brightens the
midtones and pushing it right darkens them.
Gamma applies an extra power curve on top of the mid point: higher values lighten the
midtones and lower values darken them.
The bars show how many pixels fall at each brightness. A gap on the right usually means the
photo is underexposed and needs a lower white point.
No. The pixels stay in your browser and the whole levels lookup table is calculated locally
on the page.
Partly. Lowering the white point recovers some highlight detail, but pixels that are already
pure white cannot be restored.
No. The original file on your device is untouched, and only the downloaded copy contains the
new levels.
Yes. The sliders and the histogram are fully responsive on phones and tablets in any modern
browser.
Yes. The levels tool is completely free with no account and no limit on how many images you
adjust.
Last updated: October 10, 2026