Social Media Video Formatter
Re-frame and re-encode a video to the right aspect ratio and resolution for Instagram, TikTok, YouTube, and more. Runs entirely in your browser — your file never leaves your device.
Platform specifications change over time; these presets are sensible current defaults, not guarantees. Processing runs in your browser and can be slow for long clips. Everything runs locally — your video is never uploaded. The first run downloads the engine (~25 MB); after that it is cached.
About this tool
This tool re-frames a video to the aspect ratio and resolution a platform expects, then re-encodes it as a clean MP4. Pick a target such as an Instagram Reel, a square feed post, a YouTube landscape upload, or a WhatsApp Status, and the tool scales the footage to match — either cropping to fill the frame or fitting the whole picture inside it with bars.
Unlike most online formatters, nothing is uploaded. The tool loads a WebAssembly build of ffmpeg into your browser and does the entire re-encode on your own machine, which matters when the footage is unreleased campaign material, a client edit, or anything you would rather not hand to a third-party server.
How to use it
Three steps, no signup:
- Choose a video file, or drag it onto the drop area.
- Pick the platform or format, and whether to crop to fill or fit with padding.
- Select Format, wait for the progress bar, then download the result.
The presets cover the most common Instagram, TikTok, YouTube, Facebook, and WhatsApp shapes, so you can produce a correctly sized clip without memorizing pixel dimensions.
Common questions
Does my video get uploaded to a server?
No. The formatting runs entirely in your browser using a WebAssembly build of ffmpeg. Your file is read locally and never leaves your device, which is why the first run downloads the engine but later runs are quick.
Are these platform sizes guaranteed to be correct?
They are sensible current defaults, not guarantees. Platforms such as Instagram, TikTok, and YouTube change their recommended dimensions over time, so treat these presets as a solid starting point and check the platform's own guidance if you need the absolute latest specification.
Should I crop to fill or fit with padding?
Crop to fill scales the video to cover the whole frame and trims the edges, which keeps the picture full-bleed but can cut off content. Fit with padding scales the whole video to fit inside the frame and adds black bars, which keeps everything visible but leaves borders. Choose based on whether framing or completeness matters more.
Need to shrink the file further or mute it first? Try the video compressor & muter and the video to audio extractor. For heavier media work, see our development and automation service.