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OptiFolder

Resize videos for any screen or social network

Scale videos down to 1080p, 720p or 480p, or fit them to an exact frame like 9:16 for Reels and TikTok – with letterboxing or a clean crop.

  • No upload
  • No watermark
  • No file size limit
  • Hardware accelerated

Drop videos here to resize them

MP4, MOV, WebM, MKV, AVI and more · no size limit or watermark

Processed on your device. Your videos are never uploaded.

Resolution
Exact size & social formats

Applies to the shorter side, so 720p works for landscape and vertical videos. Smaller videos are never enlarged.

Output format

MP4 with H.264 plays on every phone, computer, TV and social network.

Compression

Balanced usually cuts phone videos by 60–80% with no visible difference on a phone or laptop screen.

Advanced: codec, frame rate, audio, trim
Video codec

Auto picks the most compatible codec your browser can encode. H.265 and AV1 are smaller but play on fewer devices.

Frame rate
Audio
Trim

Use m:ss or seconds. Applies to every video in the list.

How to resize a video

  1. 1

    Add your videos

    Drop in one video or a whole batch. Landscape and vertical videos can be mixed.

  2. 2

    Pick a resolution

    Resolution presets apply to the shorter side, so “720p” gives 1280×720 for landscape and 720×1280 for vertical video.

  3. 3

    Or choose an exact frame

    Open “Exact size & social formats” for 9:16, 1:1, 4:5 or 16:9, or type your own width and height. Choose Fit to add bars or Fill to crop the edges.

  4. 4

    Resize and download

    Preview the result, then download each video or a ZIP of all of them.

Resolution versus aspect ratio

Resolution is the number of pixels (1920×1080, 1280×720…); aspect ratio is the shape of the frame (16:9, 9:16, 1:1). Lowering the resolution keeps the shape and makes the file smaller. Changing the aspect ratio means either adding bars around the video or cropping part of it away.

Resolution presets never enlarge a video. Exact frame sizes do scale the video to fill the frame you ask for, which is what social networks expect.

Video sizes for social media

Instagram Reels, TikTok and YouTube Shorts use vertical 9:16 video at 1080×1920. Instagram feed posts look best at 1:1 (1080×1080) or 4:5 (1080×1350). YouTube, X and LinkedIn videos are typically landscape 16:9 at 1920×1080.

Uploading at exactly the size a platform expects avoids surprise cropping and lets you decide what stays in the frame.

Fit or fill?

Fit keeps the whole picture and adds black bars where the shapes differ – best when nothing may be cut off, like slides or text. Fill scales the video until the frame is covered and trims the overflowing edges from the centre – best for people and scenery where the subject is in the middle.

Frequently asked questions

Does resizing make the file smaller?

Yes, usually a lot. 720p has less than half the pixels of 1080p, so the resized video needs far less data at the same quality.

Will a small video be upscaled?

Resolution presets never enlarge a video. Exact frame sizes (for example 1080×1920) do scale the video to that size, so a small clip is enlarged to fill the frame.

How do I make a landscape video vertical for TikTok or Reels?

Choose the 9:16 Vertical preset, then pick Fill to crop the sides and keep the centre, or Fit to keep the whole frame with bars above and below.

Can I rotate a video?

Videos are automatically shown the right way up based on the orientation your phone recorded. Manual rotation isn’t available yet.

Related tools

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Video converter

Change a video’s format in seconds. When the codecs allow it, the streams are copied without re-encoding, so the quality stays exactly the same.

Video for Discord

Discord blocks free uploads above its size limit. Set a target and every clip is squeezed to fit at the best quality possible – right in your browser.

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