How to Adjust Brightness and Contrast of an Image — Free Online Tool

Why Adjust Brightness and Contrast?

Not every photo comes out perfectly exposed. Indoor shots can be too dark, outdoor photos can be washed out, and screen captures often lack punch. Brightness and contrast adjustments are the most fundamental photo corrections — and often the only ones you need.

Brightness controls the overall lightness or darkness of the image. Increasing brightness makes everything lighter; decreasing it makes everything darker.

Contrast controls the difference between the lightest and darkest areas. High contrast makes lights lighter and darks darker, creating a punchier image. Low contrast flattens everything toward middle gray.

Common use cases:

Fix underexposed photos — brighten photos taken in low light or indoors.
Fix overexposed photos — darken washed-out images from bright sunlight.
Add punch to flat images — increase contrast to make photos pop.
Prepare for printing — printed images often appear darker than on screen; brighten slightly before printing.
Improve readability — increase contrast on scanned documents or whiteboard photos.
Before other edits — adjust brightness/contrast as a first step before applying filters, effects, or OCR.

How to Adjust Brightness & Contrast Online (Step by Step)

The PPImage Brightness & Contrast tool gives you precise control over image exposure.

Step 1 — Open the tool

Go to ppimage.com/brightness-contrast. No account or download required.

Step 2 — Upload your image

Drag and drop your photo, or click to browse. All common formats are supported (JPG, PNG, WebP).

Step 3 — Adjust brightness

Use the brightness slider to lighten or darken your image. Move right to brighten, left to darken. Small adjustments (±10–20%) usually look most natural.

Step 4 — Adjust contrast

Use the contrast slider to increase or decrease the tonal range. Increasing contrast makes the image punchier; decreasing it creates a softer, more muted look.

Step 5 — Preview in real time

Changes apply instantly so you can see the effect before downloading. Toggle the preview to compare with the original.

Step 6 — Download

Click Download to save your adjusted image at full resolution.

Quick Adjustment Guide

Problem	Brightness	Contrast	Result
Photo too dark	+20 to +40	+10	Brighter, visible details
Photo too bright	-20 to -30	+5	Recovered highlights
Flat / dull photo	0	+20 to +40	More vivid and punchy
Harsh / too contrasty	0	-15 to -25	Softer, gentler look
Scanned document	+10	+30	Crisper text, whiter background

Pro Tips

Small adjustments are usually better — heavy-handed brightness or contrast changes introduce artifacts (banding, blown highlights, crushed shadows). Aim for subtle corrections.
Adjust contrast before brightness — this usually produces more natural results because contrast changes affect perceived brightness.
Use for document scanning — if you photographed a document or whiteboard, max out contrast and slightly increase brightness for the clearest text.
Combine with other corrections — after adjusting brightness/contrast, use the Grayscale tool for B&W, or the Filter tool for color grading.
Compare before/after — always toggle the preview to compare with the original. It’s easy to over-correct without a reference.

Related Tools

Photo Filters — apply Instagram-style color filters after adjusting exposure.
Grayscale Converter — convert to black and white with optimized tonal range.
Image Compressor — compress your adjusted image for web use.

Fix your photo exposure now with the free Brightness & Contrast tool.