Why Chatimator renders video in your browser

Every other fake-chat video tool we studied works the same way: you write a conversation in the browser, it gets uploaded to a server, a render farm turns it into video, and you wait in a queue to download the result. Chatimator does none of that. The MP4 you export is encoded on your own machine, by your own browser. That choice shapes the whole product.

Privacy isn't a setting, it's an architecture

Chat videos are often private by nature — skits about relationships, prank scripts, mockups of unreleased products. With server-side rendering, every one of those scripts lands in someone's database, tied to your account.

With client-side rendering there is nothing to leak. Your conversation never leaves the tab. Projects save to your browser's local storage, not to our servers. We can't read your scripts because they never reach us.

WebCodecs made this possible

For years, "video in the browser" meant either recording a canvas in real time (slow, dropped frames) or shipping a compiled encoder as WebAssembly (huge, battery-hungry). The WebCodecs API changed that: browsers now expose the same hardware video encoders that native apps use.

Chatimator draws every frame of your conversation to a canvas — bubbles, typing dots, keyboard animation, scroll — and feeds them straight to the hardware encoder at 60fps. Message sounds are mixed into the audio track at the exact frame each bubble lands. The result is a real 1080p MP4, encoded faster than real time on most machines.

No queue, no watermark economics

Server rendering costs money per export, which is why competitors watermark free exports and sell render minutes. Our marginal cost per export is zero — your hardware does the work — so free exports with no watermark aren't a promotion, they're just how the economics fall out.

The trade-offs, honestly

Client-side rendering means we depend on your browser: you'll want a recent Chrome, Edge or Safari, and a phone or laptop from the last several years. Very long conversations take longer on old hardware. We think that trade is worth it — and if your export ever fails, the troubleshooting guide covers the common causes.

Try it: open the editor, write a few messages, and watch the export finish before a server-side tool would have cleared its upload step.