Rotate Video 90 Degrees Free: Fix Sideways Clips

To rotate video 90 degrees, re-encode it with the rotation applied to the pixels, not just stored as a playback hint. In the AREM Labs Rotate Video tool you drop the clip in, choose “90° clockwise” (or “270° clockwise” to turn it counterclockwise), press Rotate and download a file that plays upright everywhere.

A sideways video is one of the most common small annoyances in video work. It happens when a phone was turned after recording started, when a clip is exported from an app that ignores orientation data, or when footage from an action camera was mounted upside down. The fix takes a minute once you know which direction to pick, and why some clips look fine on your phone but sideways on your laptop. For background on formats and codecs, see the pillar guide on how to convert video files for any device or platform.

Free toolRotate VideoRotate videos 90, 180, or 270 degrees and flip horizontally or vertically. Changes are hard-coded into pixel data in your browser without uploading files.Open the tool

How to rotate a video 90 degrees step by step

The steps below use Rotate Video. The video engine runs inside your browser tab, so the clip is never uploaded.

1. Open the tool and drop your clip onto the “Drop your video here” area. MP4, MOV, WebM, MKV, AVI, FLV and 3GP files up to 1 GB are accepted.
2. Watch the preview for a second and note which way the top of the scene points.
3. Under “Rotation”, pick the chip that matches the fix from the table below: “90° clockwise”, “180° clockwise” or “270° clockwise”.
4. Tick “Flip horizontally” only if the image is mirrored, for example text reading backwards in a front-camera recording. Tick “Flip vertically” only for footage that is upside down and mirrored at the same time.
5. Leave “Output format” on “MP4 (H.264) - most compatible” unless you need another container.
6. Press Rotate. The first run downloads the video engine once (about 30 MB) and then shows a processing percentage.
7. Check the result in the preview and press Download.

The rotation is burned into every frame and the old orientation tag is cleared, so the file cannot be misread by a player later. That also means the video is re-encoded to H.264 with AAC audio at a balanced quality setting, and the file size will change slightly.

Free toolRotate VideoRotate videos 90, 180, or 270 degrees and flip horizontally or vertically. Changes are hard-coded into pixel data in your browser without uploading files.Open the tool

Which rotation setting do you need?

Direction is where most people go wrong, so match what you see in the preview to this table.

What you see in the preview	Setting to choose	Result
Top of the scene points to the left	90° clockwise	Upright; width and height swap
Top of the scene points to the right	270° clockwise (same as 90° counterclockwise)	Upright; width and height swap
Scene is upside down	180° clockwise	Upright; dimensions unchanged
Text reads backwards, orientation is fine	No rotation plus Flip horizontally	Mirror image corrected
Upside down and mirrored	No rotation plus Flip vertically	Both corrected
Upright in the preview but sideways in another app	No rotation	Orientation baked into the pixels

A 90 or 270 degree turn swaps the frame dimensions, so a 1920 x 1080 landscape clip becomes a 1080 x 1920 vertical one. That is exactly what you want for a clip that was always meant to be vertical.

Why a video looks sideways on one device but not another

Phones rarely rotate the actual image while recording. They record the sensor’s picture in one fixed orientation and save a small tag in the file that says “rotate this by 90 degrees when playing”. Phone galleries, current browsers and most social apps read that tag and show the clip correctly. Some desktop players, older editing programs, presentation software and a few upload pipelines ignore it, and the same file appears sideways.

This explains a confusing situation: you open the clip in the rotation tool and the preview already looks upright, because your browser respects the tag. If you now choose “90° clockwise”, the tag is honored and your extra turn is added on top, so the result ends up sideways the other way. In that case choose “No rotation” and press Rotate. The tool re-encodes the video as it plays, writes the orientation into the pixels and clears the tag. Play the result in the problem app to confirm.

Rotate first, then crop and compress

Rotation changes every coordinate in the frame, so it should always be the first edit.

• Rotate the clip, then remove unwanted edges with the Video Cropper. Cropping before rotating makes the left and top values refer to the wrong sides.
• If the upright file is too big for an email or a listing upload, shrink it afterwards with the Video Compressor, which can target a size in megabytes.
• iPhone recordings arrive as MOV, often in HEVC. Rotating already outputs H.264 MP4, so a separate conversion is usually unnecessary; if you only need the format change, the MOV to MP4 Converter and the guide on converting MOV to MP4 in the browser cover that. For Matroska files from screen recorders, see MKV to MP4 conversion.

Common mistakes

• Picking 90° clockwise for a clip whose top points right, which leaves the video upside down; choose 270° clockwise for that case.
• Rotating a clip that already looks upright in the preview, which turns it sideways again; choose No rotation to bake in the orientation instead.
• Using Flip horizontally to fix a sideways clip, which mirrors the image without turning it; flips are only for mirrored footage, rotation is for orientation.
• Cropping before rotating, which makes the crop remove the wrong edges; rotate first and crop the upright result.
• Rotating the same file several times to test directions, which stacks compression loss; always go back to the original and try the other setting.
• Relying on a player’s temporary rotate button, which only changes the view on your screen; export a rotated file so recipients see it upright too.

Frequently asked questions

How do I rotate a video 90 degrees counterclockwise? Choose “270° clockwise”, which turns the video the same way as 90 degrees counterclockwise. Use it when the top of the scene points to the right.

Does rotating a video reduce its quality? Slightly, because the video has to be re-encoded to write the rotation into the pixels. The tool uses a balanced quality setting, so the difference is hard to see on normal footage.

Is my video uploaded when I rotate it? No, the rotation runs entirely inside your browser tab. Only the video engine is downloaded once; your clip stays on your device.

Why is my rotated video still sideways in some apps? It usually is not, because the tool writes the rotation into the pixels and clears the orientation tag. If a clip still looks wrong, it was probably already upright in the preview; rotate the original again with No rotation selected.

One turn, fixed everywhere

A sideways clip only needs two decisions: which way the top points, and whether the preview already looks right. Answer those, open Rotate Video, pick the matching setting, and send a file that plays upright on every screen.