Color Temperature

Warm up a cold winter photo, cool down an indoor yellow cast, or push back that green fluorescent tint — two sliders, instant preview, entirely in your browser.

Private by design — your photo is processed locally and never uploaded.

Drop a photo here, or click to browse

Supported formats: JPG, PNG, WebP, GIF, BMP

Before After

Drag to compare

Tip: upload the largest scan you have — bigger input gives better results.

How It Works

Every photograph is taken under some kind of light: candlelight is warm orange, overcast shade is cool blue, fluorescent tubes are greenish. Your camera usually compensates — but old scans, phone snapshots and film digitizations often come out with a visible cast. This tool multiplies your red, green and blue channels on the spot to warm, cool or de-green the image, entirely on your own device with the HTML5 Canvas API. Your photo is never uploaded, stored or seen by anyone.

What the two sliders do:

Temperature

Positive values raise red and lower blue — the photo goes warm and amber, like candlelight or a sunset. Negative values raise blue — the photo cools down, like open shade or a blue winter morning.

Tint

Negative values push the image toward green, positive toward magenta. Fluorescent-lit interiors often need a small negative-then-positive correction to remove that sickly green cast.

Manual, not magic

You are in charge of the look. There is no hidden "correct" value — judge by eye: skin should look natural, whites should look white.

Neutralize one click

"Neutralize Cast" returns both sliders to 0, so you can compare your graded version against the unmodified original at any time.

Creative as well as corrective

Warm up an already-nice family photo for a golden-hour feeling, or push cool on a snowy landscape for a crisp winter mood.

Fully local & private

No upload, no account, no watermark. Adjust as many photos as you like — even offline.

An honest note: this is a manual color-cast dial, not an automatic white balance. It cannot measure what "true white" should be — if you want the tool to guess the neutral point for you, use the Faded Photo Fixer, which runs a gray-world auto-balance first. Over-sliding past the point where whites look right will create a new cast of its own.

How to Use

Upload the photo with the castDrag it into the drop zone or click to browse. JPG, PNG, WebP, GIF and BMP are supported.
Look at something that should be whiteFind a wall, a shirt or the sky in your photo. As you move the Temperature slider, watch that reference point until the white looks right.
Correct the green-magenta tintIf the corrected image still looks slightly green or pink, nudge the Tint slider the opposite way until skin and foliage look natural.
Go creative if you likeOnce the base is neutral, push Temperature a little positive for warmth or negative for a cool, crisp mood.
Download your resultExport PNG for archiving, JPG for sharing, WebP for the web.

FAQ

My old photo looks yellow. Which way do I slide?

Slide Temperature toward the negative (cooler/blue) side, in small steps, until the yellowed whites look neutral again. Then check skin tone — if it looks pink, pull Tint slightly toward green.

Why does my indoor photo look green?

Fluorescent and LED ceiling lights cast green. Move the Tint slider toward positive (magenta) a little at a time — 10–25 points usually kills the greenish cast.

What is the difference between this and "auto white balance"?

This tool gives you a manual dial: you decide the result. The Faded Photo Fixer's auto mode instead guesses the neutral point from the whole image (gray-world). Use auto when you want it done instantly; use this tool when you want a specific mood.

Will this fix a heavily color-shifted film scan?

It can shift the cast a long way, but extreme orange or cyan shifts may also need contrast and saturation help. Start with the Faded Photo Fixer, then fine-tune temperature here.

Is my photo uploaded to a server?

No. Everything runs locally in your browser with the Canvas API. Your photo never leaves your device — you can even disconnect after the page loads.

Is it really free and unlimited?

Yes — free, unlimited, no watermark, no sign-up. All tools stay free, supported by ads and an optional Pro tier later.