Resize Video for TikTok

Convert any video to TikTok's 1080×1920 vertical format in seconds — right in your browser. No upload, no watermark, completely free.

Resize TikTok Video Free →Free · No signup · No upload

TikTok is built for vertical video at 1080×1920 pixels (9:16 aspect ratio). If you shoot on a DSLR, drone, or screen-record your desktop, your footage will likely be in landscape or a different resolution. Uploading the wrong size means TikTok will add black bars, crop your content, or show letterboxing that hurts engagement. Resizor makes it easy to resize video for TikTok directly in your browser — no app to install, no account to create.

Simply upload your video, choose the TikTok preset, and Resizor encodes a perfect 1080×1920 H.264 MP4 file on your device using the WebCodecs API. The whole process is private — your video never touches a server — and the output is ready to upload directly to TikTok.

How It Works

Upload Your Video

Select any video file from your device — MP4, MOV, WebM, AVI and more are accepted.

Select TikTok Format

Choose the TikTok preset (1080×1920, 9:16 vertical) and the tool configures everything automatically.

Export & Post

Download your TikTok-ready MP4 and upload it directly to TikTok without any further editing.

Why Choose Resizor?

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Privacy First

Video processing happens 100% in your browser. Your content is never uploaded to any server.

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Fast Encoding

WebCodecs-powered hardware acceleration processes your video in a fraction of the time of traditional tools.

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Free Forever

No plans, no watermarks, no limits. Resize as many TikTok videos as you like at no cost.

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TikTok-Optimised

Outputs H.264 MP4 at 1080×1920 — the exact spec TikTok recommends for best quality.

Frequently Asked Questions

What is the correct video size for TikTok?

TikTok recommends 1080×1920 pixels (9:16 vertical aspect ratio) at 30fps or 60fps. The maximum file size is 287.6 MB for iOS and 72 MB for Android. Resizor outputs 1080×1920 H.264 MP4 which is fully compatible.

Can I resize a landscape video for TikTok?

Yes. Resizor will re-encode your landscape video to a 9:16 vertical frame. You can choose whether to fill the frame (cropping the sides) or fit it with black bars.

What video formats does TikTok accept?

TikTok accepts MP4 and MOV files. H.264 encoded MP4 is the most reliable format. Resizor always exports as H.264 MP4 for maximum compatibility.

Does Resizor add a watermark?

No. Resizor is completely free and never adds any watermark to your output video.

Is my video safe when I use Resizor?

Yes. All video processing runs locally inside your web browser using the WebCodecs API. Your video file is never transmitted to any server.

Resize Video for TikTok — Start Now

100% free, runs in your browser. No signup required.

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