Video Filters

The preview is the point

Filtering a video is slow. Every frame has to be decoded, changed and re-encoded, so a few minutes of footage takes a few minutes of work. That makes trial and error genuinely painful: pick a filter, wait, dislike it, pick another, wait again.

Here the filters are shown on your video as you select them, instantly, before any processing starts. Click through all fourteen, drag the intensity slider, watch the clip play under each one, and only commit when you know what you want. One encode instead of five.

That turns choosing a look from a twenty-minute chore into about a minute, and it is the main reason to use this rather than an editor that makes you render to find out.

The preview approximates — and three of them approximate badly

Being specific, because this is exactly the sort of thing you would rather learn here than after a render.

The preview uses your browser's own display effects, while the final video is produced by a proper video engine. For most filters the two are close enough that what you choose is what you get. For three, they are not:

Mirror has no preview at all. The clip looks completely unchanged while Mirror is selected, and the flip happens only in the finished video. It does work — you simply cannot see it beforehand. If you pick Mirror, expect the result to be horizontally flipped even though the preview never showed it.

Vignette previews as a general dimming of the whole frame. The real filter darkens only the corners, leaving the centre bright, which is a much nicer effect than the preview suggests. If the preview puts you off, try it anyway — the render is better than it looks.

Sharpen previews as extra contrast, which is not the same operation. The real filter genuinely sharpens edges. So the preview tells you roughly that things will look punchier, but the finished result is a truer sharpen than the preview shows.

For the other eleven — grayscale, sepia, vintage, blur, brighten, darken, contrast, saturate, cool, warm and negative — the preview is a reliable guide.

Which filters respond to the intensity slider

Worth knowing so you do not drag it wondering why nothing is happening.

The slider works on: Grayscale, Sharpen, Blur, Brighten, Darken, Contrast and Saturate.

It is ignored by: Sepia, Vintage, Vignette, Mirror, Cool Tone, Warm Tone and Negative. Those are fixed looks — you get them at one strength or not at all.

That is a sensible split. A colour grade like Sepia or Vintage is a designed look, while brightness and blur are quantities. But nothing on screen tells you which is which, so this is the list.

Grayscale being adjustable is the useful surprise: at a lower intensity you get a partly desaturated clip rather than full black and white, which is a good look for background footage that must not compete with text over it.

Choosing a filter for an actual reason

Most filter lists are decoration. A few of these fix real problems.

Brighten rescues footage shot in a dark room or against a window. Use a low intensity — pushing it hard lifts the shadows into grey mush and exaggerates noise, which is always worse than a slightly dark clip.

Contrast is the fix for flat, hazy footage — video shot through glass, in fog, or from a phone that has over-processed it. A small amount makes a surprising difference.

Saturate at a low setting revives washed-out colour. At a high setting skin tones go orange, so raise it while watching a face.

Grayscale is not only a mood: it is the reliable way to unify clips shot on different cameras or under mismatched lighting, because once colour is gone the mismatch goes with it.

Blur at high intensity turns footage into a moving background for text or titles. If you need to obscure something specific rather than the whole frame, Blur Video does one region instead.

Mirror has a practical use beyond effect: it corrects footage from a front-facing camera or a webcam that recorded you mirrored, which is why text in the shot appears backwards.

Sepia, Vintage, Cool and Warm are looks. Cool suits night, technology and anything meant to feel clinical; Warm suits sunlight, food, nostalgia and skin. Applied lightly they read as grading; applied to everything they read as a filter.

What it costs the file

Three things to expect, all consequences of the same fact: filtering re-encodes the video, because every frame is being changed.

It takes real time — roughly in proportion to length and resolution, and the work happens on your machine rather than a server. The video engine also loads into your browser on first use, which is a sizeable download, cached afterwards.

There is a small quality cost from the fresh compression. Invisible in one pass, and it accumulates — so apply your filter once from the original rather than filtering an already-filtered file.

Only one filter at a time. To combine looks you would run the tool twice, which means two generations of compression. If you want both, consider whether one is enough.

A sensible order of operations: trim first, then filter, then compress. Trimming first means you are not encoding footage you will throw away, and compressing last means you are not filtering an already-degraded file.

Nothing is uploaded, there is no watermark and no account — which is the practical difference from most of the online video editors offering filters, where the free tier either stamps the output or requires a signup.

Related tools

Blur Video blurs one region rather than the whole frame, for a face or a screen. Convert Image to Grayscale does the black-and-white conversion on a still image, with a choice of method. Video Compressor brings the finished file down in size — run it after filtering, not before.