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Image Warm/Cool Filter - Online White Balance Adjuster

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Original
Original
Adjusted
~5500K
Cool Neutral Warm
0
Green Neutral Magenta
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Frequently Asked Questions

White balance is the process of adjusting the color temperature of an image to make whites appear truly white, rather than tinted yellow (warm) or blue (cool). Proper white balance ensures accurate color reproduction across all tones in your photo. It's essential for product photography, portraits, real estate images, and any scenario where color accuracy matters. Without correct white balance, skin tones can look unnatural, products may appear off-color, and the overall mood of your image can be compromised.

Our tool adjusts the red and blue color channels of your image. Sliding toward "warm" increases red tones and reduces blue, mimicking lower color temperatures (like incandescent bulbs at ~3200K). Sliding toward "cool" increases blue and reduces red, simulating higher temperatures (like overcast skies at ~6500K+). The tint slider further refines the green-magenta balance. All adjustments happen in real-time using Canvas pixel manipulation, giving you instant visual feedback without any server upload.

We offer six one-click presets: Daylight (~5500K, neutral), Tungsten (~3200K, warm orange cast), Cloudy (~6500K, slightly cool), Shade (~7500K, distinctly cool), Golden Hour (warm with amber tones), and Fluorescent (~4000K, with green-magenta correction). Each preset sets both the color temperature and tint values. You can fine-tune further after applying any preset.

Our Auto White Balance uses the "gray world" algorithm, which assumes that the average color of a well-balanced scene should be neutral gray. It calculates the mean red, green, and blue values across all pixels, then applies gain adjustments to equalize them. This works well for most natural scenes but may struggle with images dominated by a single color (like a sunset or underwater shots). After applying auto balance, you can still manually refine the result with the sliders.

No. Everything happens entirely in your browser. Your image is loaded into a Canvas element and all pixel processing is done locally using JavaScript. No data is ever sent to any server. This means your photos remain private, the tool works offline after the page loads, and there are no upload size limits beyond what your device's memory can handle.

The tool supports JPEG, PNG, WebP, BMP, and most common raster image formats that modern browsers can decode. HEIC/HEIF files from iPhones are also supported in recent browsers. For best results, use high-quality JPEG or PNG images. The downloaded result will be saved as a PNG to preserve quality. SVG vector files are not supported since the tool works with pixel data.

Yes! The preview area includes an interactive before/after comparison slider. Drag the vertical divider left or right to reveal more of the original or the adjusted image. The left side shows your original image, while the right side displays the adjusted version with your current settings. This makes it easy to see exactly how your white balance corrections affect the photo at any point.

  • Look for neutral references: If your photo contains something white or gray (a wall, shirt, cloud), aim to make it appear neutral.
  • Use Auto WB as a starting point: Click Auto White Balance first, then fine-tune manually.
  • Consider the mood: A sunset should remain warm; over-correcting can ruin the atmosphere.
  • Check skin tones: For portraits, prioritize natural-looking skin over perfectly white whites.
  • Small adjustments go a long way: Often ±15-30 on the warmth slider is enough for noticeable improvement.