Free aspect ratio converter

Reframe one clip for every platform

Convert any video to 16:9, 9:16, 1:1, 4:5 or 21:9 with safe-zone overlays for LinkedIn, TikTok, Reels, Shorts and X. Cropping happens in your browser. No signup, no upload.

How it works

Three steps, zero signup

  1. Step 01

    Drop your clip

    MP4, MOV or WebM up to 100MB. The file stays in your browser; nothing is uploaded.

  2. Step 02

    Pick a ratio and platform

    16:9, 9:16, 1:1, 4:5 or 21:9. Toggle a platform preset to see LinkedIn, TikTok, Reels, Shorts or X safe zones overlaid on the crop.

  3. Step 03

    Convert in the browser

    The tool crops and re-encodes the clip locally on your machine. Download the new MP4 when it's ready.

Use cases

Made for the work you already ship

Pick the angle that matches your release. Each one fits the free tool and the full editor.

Cross-post a release video

One demo clip, every social channel. Reframe the same 16:9 walkthrough for LinkedIn, TikTok, Reels, Shorts and X without re-editing.

Vertical from a 16:9 demo

Pull a vertical cut out of a Loom or Figma walkthrough so the launch post on TikTok or Shorts focuses on the right part of the screen.

Square for LinkedIn feed

Take the wide product video that lives on your release page and ship a 1:1 version that doesn't get letterboxed in the LinkedIn feed.

Snippet for an X / Twitter thread

Cut a 16:9 clip with the focal point re-centered for the in-feed player. Same source, better framing.

Wide clip from a vertical screen recording

You recorded the demo on your phone, the team needs it for the keynote screen. Reframe a portrait recording to a clean 16:9.

Sales call snippet for a deck

Trim a wide call recording to a 4:5 highlight and drop it into the next sales deck without leaving the browser.

Examples

A few things you can ship in under a minute

Drop any screenshot, image or clip. The tool keeps the visual language Pitvi uses inside the editor.

16:9 → 9:16

Horizontal product demo cropped for TikTok and Shorts.

16:9 → 1:1

Wide footage made feed-friendly for LinkedIn.

9:16 → 4:5

Vertical clip retimed for Instagram feed posts.

Built into Pitvi

One source, every aspect ratio, automated

The Pitvi editor can render the same scene as 16:9, 9:16, 1:1, 4:5 and 21:9 in a single export. Text reflows, mockups re-position, and safe zones are respected per platform, so you don't need to re-edit every version.

See multi-format export
  • Multi-format export from one composition
  • Per-platform safe zones inside the editor
  • Text and elements reflow per ratio
  • Render queue handles every format together
FAQ

The most common questions

Quick answers about how the tool works, what's allowed, and how it ties back to Pitvi.

Related tools

More free tools from Pitvi

Ready to ship the full video?

One edit, every social platform

Pitvi renders your motion video as 16:9, 9:16, 1:1 and 4:5 in a single export. No re-editing per platform. Free to start.