Convert horizontal footage into a full-screen vertical TikTok, choosing whether to crop or keep the whole frame. Nothing is uploaded, and there’s no account, watermark or limit.
Drop your clip (MP4, MOV, WebM or MKV) on the page, or tap to pick one or several. The row tells you the dimensions you'll get, such as “Output 1080×1920”.
Leave “Format” on “9:16 vertical” for a normal full-screen TikTok, or switch to “1:1 square”.
Pick a “Framing”: “Blurred background” or “Black bars” keep everything in the shot, “Crop to fill” zooms in until the screen is full. Check the preview of your first clip.
Press “Resize 1 video” and save the MP4 with Download (or “Download all (.zip)” for a batch).
TikTok is built around a vertical, full-screen feed. If you upload a landscape 16:9 clip as it is, it plays as a small strip across the middle of the phone with empty space above and below, and most of the screen goes unused. Converting it to 9:16 before posting lets it fill the display like the videos around it.
The clearest published numbers come from TikTok's Ads Manager help page on video ad specifications. They apply to ads, not ordinary posts, but they are a reliable baseline: vertical 9:16 is recommended at 540×960 or more, square 1:1 at 640×640 or more, and horizontal 16:9 at 960×540 or more. Ad files can be .mp4, .mov, .mpeg, .3gp or .avi, up to 500 MB and 10 minutes long, with a bitrate of at least 516 kbps.
filetidy's output clears those minimums comfortably. A 9:16 video is made at 1080×1920 from HD footage, a square one at 1080×1080, and even small sources come out with at least 720 pixels on the long side. The H.264 picture uses about 6 Mbit/s at 1080×1920 and 30 fps, so one minute takes roughly 45 MB.
Length limits for normal TikTok uploads have changed several times and depend on how you post, so check the app before you export. If the clip runs long or opens with dead time, trim it first: on a feed people scroll quickly, the first seconds matter most, and a shorter file uploads faster.
iPhone & iPad
This is a pure crop: about two thirds of a 16:9 picture is cut away, so it only suits shots with a single central subject.
Windows
You need to sign in with a Microsoft account, and the export re-encodes the video.
Talking heads, selfies, tutorials filmed face-on and anything with one person in the middle of the frame usually look best with “Crop to fill”. The face becomes large on the screen, which is what people expect on TikTok, and losing the edges of a room doesn't matter. On a 16:9 source this keeps about a third of the width, and the warning tells you the exact share before you commit.
Wide shots are the opposite: a beach, a concert stage, a football pitch, two people side by side, a car driving across the frame. Cropping those cuts out the point of the video. “Blurred background” keeps the full scene in a band across the middle and fills the rest of the screen with a soft, darkened enlargement of the same footage, so it still looks native.
“Black bars” are the plainest choice and work for screen recordings, gameplay and slides, where blur behind text would look messy. The square 1:1 format is a middle ground when you want less empty space than a vertical frame around landscape footage.
Remember that TikTok overlays the caption, account name and buttons on the lower part and right edge of the screen. With any framing, keep faces and on-screen text away from those areas.
It is shown shrunk to the width of the phone, with empty bands above and below, so it looks small next to full-screen videos. Converting it to 9:16 first, either cropped or over a blurred copy of itself, lets it use the whole display.
The minimum resolutions, file types, 500 MB size and 10-minute length come from TikTok's Ads Manager help on video ad specifications, so strictly they describe ads. 1080×1920 is simply the usual full-HD vertical size, not a rule TikTok imposes on normal posts.
Crop, in most cases. A person speaking to camera is usually centred, so “Crop to fill” keeps the face large and sharp. Switch to the blurred background if two people sit side by side or the frame has text near its edges.
No, resizing keeps every second. Cut the clip with the trim tool first, then resize the shorter file; it is faster to process and quicker to upload as well.
No. filetidy never upscales, because enlarging only adds blur. A 720p clip comes out at 720×1280, which is still above the 540×960 minimum TikTok lists for vertical ads and looks fine on a phone.
No. The reframing and encoding happen in your browser on your own device, and the file is saved straight back to it. Only you decide when it goes to TikTok.
Last updated October 28, 2026