Are PixelTools free to use?

Yes, all 18 image tools on PixelTools are completely free with no limits, no account required, and no hidden fees.

Do my images get uploaded to a server?

Never. All processing happens locally in your browser using the Canvas API. Your files never leave your device.

What image formats are supported?

Most tools accept JPG, PNG, WEBP, and GIF. Output formats depend on the specific tool.

Is there a maximum file size?

No hard limit. Very large files (20MB+) may take a few seconds on older devices but will process correctly.

PixelTools

Browse Tools

Brightness & Contrast

Adjust image brightness and contrast online with live preview. Free, private, browser-based.

Processed locally in your browser

Your files are not uploaded

Free and private

Drag & drop your image here

or click to browse

Supports PNG, JPG, WEBP, GIF

Adjust Image Brightness & Contrast Online

Brightness and contrast are the two most fundamental image adjustments. Brightness controls overall lightness, while contrast controls the difference between the lightest and darkest areas. Together, they can dramatically improve underexposed photos, fix washed-out images, or prepare images for specific display environments.

Our tool uses the browser's native CSS filter API for real-time adjustments, then renders the final result to a Canvas for download. Everything runs locally — no uploads, no accounts, no limits.