Auto colour correction for video
Most footage that looks wrong is not badly shot, it is badly exposed and slightly the wrong colour — a window behind the subject, a warm bulb, a phone that guessed. Auto correction measures your actual frame and pulls the levels and the white balance back to where they should have been. One click, in the browser, on video you never upload.
What it measures, and why that matters
The correction is not a filter. The frame is analysed for where its darkest and brightest real values sit and where the channel averages are, and the adjustment comes out of those numbers — so a flat clip gets contrast, a dark clip gets exposure, and a clip with an orange cast gets the orange taken out. A filter would do the same thing to all three and be right about none of them.
It is called auto rather than AI on purpose. There is no model here: it is percentiles and channel means, which is a described, checkable calculation rather than a black box. That also means it never hallucinates a look you did not ask for.
When to correct and when to grade
Correcting is making the picture right: neutral whites, sensible contrast, skin that looks like skin. Grading is making it feel like something: warm, faded, cinematic. They are different jobs and they go in that order, because a look applied to a wrong picture inherits everything wrong with it.
The usual workflow here is one click of auto correction, then a look at low strength, then captions. Ninety seconds for footage that came off a phone in bad light.
When it will not save you
Clipped highlights are gone — a blown-out window has no detail to recover, in this or in Resolve. Heavy noise from a dark room gets more visible as you lift the shadows, not less. And a mixed-lighting shot, daylight on one side and a warm lamp on the other, cannot be neutralised globally because the two halves need opposite corrections.
For those, the manual controls are there: the wheels, the curve and the selective colour region, all of which work on the same frame.
Questions
Is it really automatic?
One click. The frame at the playhead is analysed and the correction is applied to the whole clip; you can then nudge anything it decided, or undo it entirely.
Will it change my footage file?
No. The grade is applied as each frame is drawn and again at export. The original file on your disk is never touched — the export writes a new one.
Does auto correction cost anything?
No. Correction, the colour wheels, the curve, every look and imported LUTs are all free, and free exports are unlimited at 480p. Only removing the watermark and exporting in HD is paid, once per video.
Can I correct one clip in a longer timeline?
The grade applies to the project rather than per clip, so a timeline of shots from very different lighting is better corrected before you assemble it, or split into separate exports.
Related free tools
Try it on your own video
Nothing to install, no account, and your video never leaves your device. Unlimited free exports, and a one-off payment when you want the watermark gone.
Caption my video — free