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After Effects can do this — but it's a lot of tool for one effect
There's no question that After Effects can produce the text-behind-subject effect, and produce it perfectly. It's the industry standard for compositing and motion graphics, and for complex work that needs precise, frame-by-frame control it earns its reputation. But it's also a roughly twenty-three-dollar-a-month subscription, a serious time investment to learn, and demanding on hardware. If your goal is this one effect on a short clip, you're buying and learning an entire VFX suite to do a single job — and that's exactly the gap a lighter alternative fills.
The traditional way, and why it takes a while
In After Effects the effect is built by masking. You import your footage, create a mask layer, and trace around your subject — by hand with the pen tool or semi-automatically with Roto Brush — then adjust that mask on every frame where the subject moves, refining the edges around hair and other fine detail, and finally place the text between the masked subject and the background so the subject sits in front of it. Roto Brush takes some of the manual labor out, but it still needs cleanup on most real footage. For an experienced editor, a ten-second clip is realistically twenty to thirty minutes of work. It's not hard, exactly; it's just slow and repetitive.
The depth-based shortcut
The AI alternative attacks the problem from a completely different angle. Instead of tracing the subject's outline, a depth-estimation model works out how far every pixel is from the camera and builds a depth map of the whole scene. You then give your text a depth value, and anything nearer to the camera than that value automatically renders in front of it — recalculated for every frame, with no tracing and no cleanup. The masking problem simply disappears, because you're never masking; you're placing text at a distance in 3D space.
How they actually compare
Run the same ten-second clip through both and the time difference is stark. The After Effects route — call it five minutes of setup, twenty minutes of masking and cleanup on a subject with hair detail, and a few minutes to render — lands around thirty minutes. The browser route is upload, add and position the text, export: under two minutes start to finish.
The honest caveat is quality. Look closely and After Effects produces cleaner edges, while the depth-based version has softer transitions where the text meets the subject. That's a real difference if someone is scrutinizing the frame. At the size and scroll speed people actually watch social video, though, it's not something a viewer perceives — which is the whole point of choosing the fast path for that kind of content.
Choosing between them
The decision is really about stakes. After Effects is the right call for client work that gets reviewed frame by frame, for complex multi-layer compositions where many elements each need specific behavior, and for broadcast delivery with strict codec and format requirements — situations where pixel-perfect control isn't optional. The browser tool is the better choice for social content where speed beats perfection, for testing whether an effect even works before you commit to a full workflow, for people who need the result without learning professional software, and for anyone weighing a free tool against a monthly subscription. Plenty of editors keep both and pick per project: the browser tool for quick social pieces, After Effects for client deliverables, sometimes mocking the idea up in the browser first.
The browser process itself is about ninety seconds including upload: open the depth text editor, add your text (bold fonts hold up best behind a subject), enable depth detection and click your subject, adjust the threshold slider, and export. The low-risk way to evaluate it is to load a genuinely challenging clip — busy background, moving subject, some hair — and see how it copes with your real footage. If it's not good enough, you've lost thirty seconds; if it is, you've saved half an hour. Once the depth text is set, a film color grade and auto captions round the shot out.
Related: How to add text behind a person | Best caption styles for social media
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