Brightness & Contrast — Free Online

Adjust image brightness and contrast

Free, fast, and runs entirely in your browser — no signup, no upload to a server.

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Sources we checked for Brightness & Contrast

• W3C PNG specification — The official PNG standard.
• JPEG.org — the JPEG standard — Standards body behind JPEG compression.
• MDN — Canvas API — The browser API used for in-browser image processing.
• MDN Web Docs — Mozilla's open reference for the browser APIs these tools run on.