Video resizer
Resize a video for TikTok, Instagram, YouTube or any size you type. Crop it to fill the new shape, or keep the whole picture on a blurred background, and download an MP4. Nothing is uploaded.
MP4, MOV, WebM or MKV, or drop one on the preview. It's resized on your device: nothing is uploaded.
An example: 8 seconds of IMPAULSIVE
Free, no watermark, and nothing to sign up for.
How to resize a video
- Choose your video, or try the example. MP4, MOV, WebM and MKV all work, up to 30 minutes at a time.
- Pick a size. One of the apps' sizes, the same shape at another resolution (4K, 1440p, 1080p, 720p, 480p, 360p), or a custom width and height from 128 to 3840 pixels.
- Choose how it fills the new shape: crop to fill and drag the picture to what matters, or keep all of it on a blurred background or between bars. The preview is drawn exactly as the file will be.
- Press Resize video and download the MP4, with its sound. No watermark, nothing to sign up for.
Video sizes for each app
These are the sizes the resizer makes. Each app takes others too, but these fill the screen or the feed with nothing cut off.
| Shape | Size | For |
|---|---|---|
| 9:16 | 1080 × 1920 | TikTok, Reels, Shorts |
| 4:5 | 1080 × 1350 | Instagram, Facebook feed |
| 1:1 | 1080 × 1080 | Square post |
| 16:9 | 1920 × 1080 | YouTube, X, LinkedIn |
| Same shape | 1280 × 720 to 3840 × 2160 for a wide video | A smaller or larger file of the same video |
For every app's limits on length, file size and frame rate, read video sizes for TikTok, Reels and Shorts, or check a video against them with the video size checker.
Crop, blurred background or bars
Crop to fill uses the whole frame, so it looks native in the feed, but it cuts off the sides: a 9:16 crop of a 1920 × 1080 video keeps 608 × 1080, about a third of the picture. Drag it to the speaker, the product or the action.
Blurred background keeps everything: the picture sits in the middle on a blurred, darkened copy of itself. It suits slides, screen recordings and wide shots where nothing can be cut. Bars does the same on black or white.
A crop holds one spot for the whole video. When the person talking moves, or two people take turns, part of the clip frames no one. That's what Clyper's auto reframe is for: it follows whoever is talking.
Questions
How do I resize a video?
Choose the video, pick a size (9:16, 4:5, 1:1, 16:9, the same shape at another resolution, or your own width and height), choose how it fills the new shape, then press Resize video and download the MP4.
Is my video uploaded anywhere?
No. Your browser reads the video, draws every frame at the new size and saves the file, all on your device. Nothing is sent to us or anyone else.
How do I resize a video for Instagram?
Pick 4:5 (1080 × 1350) for a feed post, 9:16 (1080 × 1920) for a Reel or story, or 1:1 for a square post. Then crop it to fill, or keep the whole picture on a blurred background.
Can I resize a video without cropping it?
Yes. Choose Blurred background or Bars and the whole picture is kept, with a blurred copy of itself or a plain color filling the rest. Or pick Same shape to change only its resolution.
Does resizing a video make the file smaller?
Usually, when the new size has fewer pixels: 1280 × 720 has about half the pixels of 1920 × 1080. To hit an exact file size, for Discord or email, use the video compressor instead.
Is there a limit?
Up to 30 minutes at a time, and up to 3840 pixels a side. Every frame is redrawn and re-encoded, which takes about as long as the video plays on most computers, so a short part is quicker.
Clips that follow the speaker
Paste a YouTube link and Clyper finds the best moments, frames each one 9:16 on whoever is talking and captions every word: up to 30 clips from one video.
Guides
- Making clipsHow to resize a video for Instagram, TikTok, YouTube and moreThe size each app wants, crop or blurred background or bars, and how to resize a video on a phone, a computer or free in your browser.12 min read
- Making clipsVideo sizes for TikTok, Reels and Shorts in 2026The sizes, shapes and limits for each app, where captions are safe, and how to make a 16:9 video vertical.7 min read
- Making clipsHow to convert a horizontal video to vertical (16:9 to 9:16)The three ways to make a 16:9 video 9:16, which suits which footage, what a crop keeps, and how to keep a moving speaker in frame.12 min read
More free tools
- Vertical video converterTurn a horizontal video into a 1080 × 1920 one for TikTok, Reels and Shorts, cropped or fitted, without uploading it.
- Split screen video makerStack a streamer's webcam over the game, two people talking, or a clip over gameplay, in one 1080 × 1920 video.
- Crop videoCrop a video to any shape, 9:16, 1:1, 4:5 or your own, by dragging a box over it, without uploading it.
- Add text to videoPut a title, a hook or a label on a video, styled the way clips are and placed clear of the apps' buttons, as an MP4 with no watermark.
- Add watermark to videoPut your @handle or logo on a video, see-through, in any corner or moving between them, clear of the apps' buttons.
- Rotate videoTurn a sideways or upside-down video the right way up, or flip it, in seconds and without uploading it.
- Add captions to videoBurn captions into a vertical video, word by word in the styles clips use: transcribed from its speech, or from an SRT or VTT file.
- Auto caption generatorTurn a video's speech into timed captions in your browser: edit them, download SRT or VTT, or burn them into a vertical video.
- SRT to VTT converterConvert subtitles between SRT and VTT, shift their timing, or turn them into plain text, in your browser.
- Video to text converterTranscribe a video or audio file into text with timestamps, in your browser, and copy or download it.
- Video compressorMake a video smaller to fit Discord, an email or any size you pick, as an MP4, without uploading it.
- MP4 converterTurn MOV, MKV, WebM and other videos into MP4, several at once, without losing quality when the formats allow, and without uploading them.
- Video trimmerCut a video down to the part you want, at the same size and quality, in your browser and without uploading it.
- Video splitterSplit a video into parts: every 30 or 60 seconds, into equal parts, or where you mark it, kept as it is or 9:16 and numbered.
- Merge videosJoin clips into one video, in the order you choose, fitting clips of other shapes on a blurred background, black bars or a crop.
- TeleprompterRead your script on camera: it scrolls at your speaking pace, pauses when you do, and can record you with your camera.
- Speed up videoSpeed a video up or slow it down, from 0.25× to 4×, keeping the voice's pitch, and download the MP4. Works on audio too.
- Video to GIF converterTurn a few seconds of a video into a GIF, at the size and smoothness you pick, in your browser.
- Remove background noise from videoTake fans, hum, traffic and room noise out of a video's sound (or a sound file's) and keep the voice, on your device.
- Increase video volumeMake a quiet video louder: it's measured in LUFS and brought up to -14 LUFS, a common level for social video, without distorting.
- Bleep censorBleep the swearing out of a video or podcast: it's transcribed on your device, the swear words found, and each one bleeped.
- Add music to videoPut a song under a video's sound: set the volumes, fade it, loop it, and let it dip when someone talks. Download the MP4.
- Video to MP3 converterSave a video's sound as an MP3, M4A or WAV, all of it or just a part, in your browser and without uploading it.
- Audiogram makerTurn a podcast's audio into a video: its cover, a waveform that moves with the sound and captions from the speech, as a 9:16, square or 16:9 MP4.
- Remove audio from videoTake the sound out of a video, keeping the picture exactly as it is, in seconds and without uploading it.
- Remove silence from videoCut the pauses out of a talking video or podcast automatically: hear it without them first, then download a tighter MP4.
- Video size checkerCheck a video's shape, size, length and format against what TikTok, Reels and Shorts take, and see what to fix.
- Safe zone checkerCheck your clip against TikTok, Reels and Shorts' buttons and captions before you post.
- YouTube thumbnail makerMake a 16:9 thumbnail from a frame of your video: a bold title, your face on top, and a preview the way YouTube shows it.
- YouTube banner makerMake a 2560 × 1440 YouTube channel banner with your name and schedule inside the area every device shows, and preview it on a TV, a computer and a phone.
- Shorts thumbnail makerMake a 9:16 cover for a Short, a TikTok or a reel: a frame of your video with a bold title, at the sizes the apps suggest.
- YouTube clip makerClip any moment of a YouTube video by its start and end, and share it as a link, an embed or its timestamps.
- YouTube timestamp generatorMake chapters for a YouTube description: mark them as the video plays or from its transcript, checked against YouTube's rules.
- YouTube thumbnail downloaderGet any YouTube video's thumbnail in every size YouTube keeps, up to 1280 × 720, from its link.
- Aspect ratio calculatorFind any size's aspect ratio, a new width or height at the same ratio, and the crop for 9:16, 1:1 or 4:5.
- Clipping earnings calculatorSee what your clips could earn on campaigns that pay per 1,000 views, by the day, month and year.
- YouTube Shorts money calculatorSee what YouTube Shorts pay for your views, from the ad revenue Shorts share with creators in the Partner Program.
- TikTok money calculatorSee what TikTok's Creator Rewards Program could pay for your views, per 1,000 qualified views.
- YouTube money calculatorSee what your YouTube videos could earn from ads, per 1,000 views, by the month and the year.
- Twitch money calculatorSee what your Twitch subs, Prime subs, Bits and ads could pay a month and a year, on the standard 50% share or the Plus Program's.
- YouTube watch hours calculatorSee how many watch hours your views make and how long until you reach YouTube's 4,000 for monetization.
- Engagement rate calculatorWork out a post's engagement rate on TikTok, Instagram or YouTube, by views and by followers, against typical rates.
- Hook generatorGet opening lines for your clips from formulas that keep people watching past the first second.