Resize preset

Resize Video for TikTok

9:161080 × 1920Letterbox

TikTok expects 9:16 vertical video at 1080x1920. Uploads in any other shape get letterboxed or cropped by TikTok's own pipeline, and the result rarely looks the way you intended. This tool resizes any horizontal, square, or off-ratio source into the exact 1080x1920 frame TikTok wants. Letterbox mode keeps your full source visible with black bars at the top and bottom, which preserves every frame of the original. Crop mode fills the frame edge to edge by trimming the sides, which fits viewers who never see the letterboxing anyway.

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Resizing for TikTok in detail

The TikTok safe zone matters almost more than the dimensions themselves. The top 220 pixels of the frame sit under the username and music ticker, and the bottom 440 pixels sit under the caption, like and share buttons, and the Follow prompt. Any text you burn into those regions will be occluded on mobile. This tool outputs at the native 1080x1920 so you can author your text inside the safe middle band, roughly 1080x1260, and trust that the chrome will not cover it.

Processing happens in your browser. No account, no upload, no watermark. The final MP4 uses H.264 video and AAC audio, the combination TikTok transcodes most cleanly. You can run this tool offline once the page has loaded.

TikTok video specifications

Setting	Value	Notes
Aspect ratio	9:16 (vertical)	1:1 and 16:9 are accepted but letterboxed by TikTok.
Recommended resolution	1080 x 1920	Full HD vertical, the sweet spot for the For You page.
Duration range	3 seconds to 10 minutes	Most accounts can now post up to 10 minutes.
Maximum file size	287.6 MB (iOS), 72 MB (Android), 4 GB (desktop)	Mobile app enforces tighter caps than the web uploader.
Top safe zone	220 pixels	Occluded by username, music ticker.
Bottom safe zone	440 pixels	Occluded by caption, like, share, Follow prompt.
Codec	H.264 MP4 with AAC audio	Most reliable encoding for TikTok's transcoder.

When to use this preset

Turning horizontal YouTube into TikTok

Letterbox a 16:9 gameplay or tutorial clip into 9:16 without losing the edges of the frame, then add vertical text above and below.

Product unboxing and demos

Crop a centered subject from a square or landscape recording into the full vertical frame for maximum visual impact.

Talking head explainers

Letterbox a webcam recording to fit TikTok, then overlay captions in the safe middle band so the UI chrome never covers them.

Dance trends and lip syncs

Start from a horizontal phone-mount recording, crop to 9:16 so the performer fills the frame.

Repurposing Instagram 1:1 posts

Letterbox a square source into 9:16 for a quick TikTok repost without re-shooting.

Frequently asked questions

What size should a TikTok video be?

TikTok recommends 1080x1920 pixels in a 9:16 vertical aspect ratio. That matches the phone screen full-bleed and gives the For You page its native look. Uploads at other sizes are accepted but TikTok letterboxes or crops them automatically with no control over which approach it uses.

What aspect ratio does TikTok use?

The native TikTok aspect ratio is 9:16, full-screen vertical. TikTok also accepts 1:1 square and 16:9 landscape uploads, but both get shrunk into the 9:16 viewport with empty space above and below. Creators who plan for 9:16 from the start consistently get higher completion rates.

How do I upload a horizontal video to TikTok without black bars?

You have two options. Letterbox the source into 9:16 and design around the black bars with text or graphics placed in the blank space, or crop into 9:16 and accept losing the edges of the original frame. This tool offers both fit modes so you can pick the one that fits the content.

Why does TikTok cut off my video?

The top 220 pixels and bottom 440 pixels of every TikTok video sit under the app's UI. If important text or faces are in those regions they appear occluded when viewers watch on mobile. Author your content inside the safe middle band, roughly the center 1080x1260 of the 1920 height, to avoid cut-off.

What is the TikTok safe zone?

The safe zone is the region of the 1080x1920 frame that is never covered by TikTok's on-screen chrome. Subtract 220 pixels from the top and 440 from the bottom, leaving a safe band of roughly 1080x1260. Text, logos, and anything visually critical should live entirely inside this band.

Can I post a 4K video on TikTok?

Yes, but TikTok re-encodes it down to roughly 1080p for playback, so the extra resolution is mostly wasted. Uploading at 1080x1920 saves bandwidth on upload and gives TikTok's transcoder less work to do, which produces a cleaner final stream for viewers.

What format does TikTok prefer?

MP4 containers with H.264 video and AAC audio. This tool outputs that combination by default. MOV files from iPhones work but occasionally fail to upload on Android TikTok builds; converting to MP4 first avoids the issue.

100% Private: Your Video Never Leaves Your Device

Resizing runs locally in your browser using FFmpeg compiled to WebAssembly. Your video file is read from disk into browser memory, processed there, and the result is saved back to your device. No network request is made during encoding, no data is transmitted, and no server ever sees your footage.