Overall brightness
Photo adjustment comparison
Image Adjustment Comparison
Upload one image, tune the visible photo adjustments, and compare the current edit against the original.
- Browser-local processing
- PNG · JPG · WebP
- No account needed
Original vs current edit
Compare the original image with the current adjustment state.
Upload one image, adjust the photo, and compare the edited version with the original.
Contrast range
Color intensity
Clipping risk
Advanced metrics
Upload an image to calculate luma, clipping, contrast, and chroma metrics.
Luma histogram
Histogram appears after an image is uploaded.
Original Current edit
Image session actions
Upload one image, adjust the photo, and compare the edited version with the original.
How to read this page
View the current edit against the original
This image adjustment comparison page is a live review workspace. Upload one image, adjust the visible photo values, and compare the current edit with the original to see how exposure, brightness, contrast, color, and detail changes affect the image.
Scope
This tool compares visible adjustment changes. It does not recover exact Lightroom, Photoshop, or camera settings.
Adjustment comparison guide
What Image Adjustment Comparison Does
Compare photo edits
Review the original vs edited photo with a slider or side-by-side view so the overall edit direction is easy to judge.
Read the overall edit summary
Use brightness, contrast range, color intensity, and clipping risk cards to see whether the image edit comparison is balanced.
Move into focused pages
Use focused comparison pages when exposure, brightness, contrast, levels, or saturation needs a more specific metric view.
Terms and image roles
How to Read an Image Adjustment Comparison
Image adjustment comparison is the general review pass for a finished or nearly finished photo edit. It shows the live effect of the current edit against the original frame, so you can see how exposure, brightness, contrast, saturation, temperature, and tint combine into one visible result. In an original vs edited photo review, the important question is not whether one slider moved; the important question is whether the combined edit changed light, tonal separation, color intensity, and clipping in a controlled way.
A useful photo edit comparison starts with luma, because luma is the brightness component that shapes how people read form and detail. Browser previews usually work in sRGB values, while many concepts such as relative luminance use a weighted idea of red, green, and blue. A practical luma approximation is Y = 0.2126 R + 0.7152 G + 0.0722 B after values are normalized. That formula explains why green-heavy areas often dominate perceived brightness. Use image adjustment comparison to check the whole edit first, then move into the focused pages when one control needs a narrower diagnosis.
Use image adjustment comparison as the final checkpoint after individual slider work. A strong image adjustment comparison keeps crop, zoom, and viewing mode steady so the photo edit comparison is about real pixel change instead of a changing viewing angle. When the image adjustment comparison feels better but one metric moves sharply, inspect that term below before exporting the adjusted image.
Exposure
Exposure describes an EV-style light multiplier. A +1 EV idea roughly means twice as much light, while -1 EV roughly means half as much light.
- Role in the image
- In an image adjustment comparison, exposure changes the overall light level and often reveals whether highlights or shadows are fragile.
- Concept or calculation
- A simple exposure model multiplies linear light by 2^EV before converting back to display values.
- Watch for
- Watch highlight clipping after positive exposure and shadow blocking after negative exposure.
Brightness
Brightness is a more direct value shift. It is useful when the photo needs a lighter or darker read without thinking in camera terms.
- Role in the image
- Brightness often moves midtones first, so the edited photo may feel cleaner or flatter even when clipping does not change much.
- Concept or calculation
- A brightness shift adds or subtracts from normalized pixel values, then clamps the result into the display range.
- Watch for
- Too much brightness can wash out local contrast and make the original vs edited photo comparison look gray.
Contrast
Contrast controls the distance between dark and bright tones. It changes separation, not just lightness.
- Role in the image
- Contrast gives the edit depth, but it can also crush shadows or push highlights into a hard edge.
- Concept or calculation
- One common contrast model expands values around a midpoint such as 0.5: output = (input - 0.5) * factor + 0.5.
- Watch for
- Compare photo edits at faces, product edges, and skies, because contrast damage often appears there first.
Saturation
Saturation controls color intensity, or how far color sits away from a neutral gray of similar luma.
- Role in the image
- Saturation can make the current edit feel vivid, but it may also distort skin tones or product colors.
- Concept or calculation
- A practical model blends each color channel away from or toward luma: output = luma + (channel - luma) * saturationFactor.
- Watch for
- A photo edit comparison should check saturated reds, greens, and blues before accepting a strong color increase.
Temperature and Tint
Temperature shifts warm versus cool color balance. Tint shifts green versus magenta balance.
- Role in the image
- They set the color cast of the edited image and can change how neutral surfaces, faces, and white backgrounds feel.
- Concept or calculation
- White balance is not just saturation; it changes channel relationships before color intensity is judged.
- Watch for
- Use neutral objects in the image as anchors, because a pleasing global color cast can still make whites or skin inaccurate.
Start broad, then isolate
Use image adjustment comparison to judge the full edit first. If the edited photo is too bright, move into exposure comparison or brightness comparison. If it lacks shape, move into contrast comparison. If the color is too strong, move into saturation comparison. This keeps the broad photo edit comparison from becoming a guessing game.
Pair light and separation carefully
Exposure and brightness can make the image easier to see, but contrast determines whether detail still has shape. A good image adjustment comparison and original vs edited photo check looks for a balanced combination: enough light to reveal subject detail, enough contrast to preserve depth, and enough saturation to support the subject without overpowering it.
FAQ
About this page
Is this a full photo editor?
No. It is a comparison workflow for checking visible adjustment changes before you keep an edit.
When should I use a focused comparison page?
Use this page for an overall edit comparison. Use focused pages when one control, such as exposure, contrast, levels, or saturation, needs deeper metrics.
Is my data safe?
Yes. Your image and adjustment data run locally in your browser and are not uploaded to our server.