How to Resize Video in Premiere Pro
Scale one clip, fit mixed footage to your sequence, or turn a finished 16:9 edit into vertical, using the Premiere Pro tool built for each job.
The fastest way to resize video in Premiere Pro is to right-click the clip in your Timeline and choose Set to Frame Size — this fits the clip to your sequence without touching the original footage. For manual control, select the clip and drag Effect Controls → Motion → Scale. To convert a finished 16:9 edit into a 9:16 vertical video, use Sequence → Auto Reframe Sequence instead.
- Clip doesn't fit the sequence — right-click → Set to Frame Size
- Zoom or shrink one clip —
Effect Controls → Motion → Scale - Whole project at a new size —
Sequence → Sequence Settings - 16:9 edit to 9:16 —
Sequence → Auto Reframe Sequence - Export —
Ctrl/Cmd + M, format H.264, check Width and Height
When you are in the editing space, the word "resize" can mean several different things. You might want to zoom into a single clip, make a 4K clip fit a 1080p timeline, change the size of the whole project, or make a vertical version of a finished edit. Each of those has its own tool and workflow, and picking the wrong one will cost you time or detail.
This guide has got you covered. I'll start with the simplest (manually scaling a clip) and build up to the most powerful method (using Auto Reframe to convert a finished 16:9 edit into a 9:16 short without re-editing anything).
Which Tool For Which Job
| You want to | Use | Notes |
|---|---|---|
| Zoom or shrink one clip | Effect Controls → Scale | Changes only that clip |
| Fit a clip of a different size to the sequence | Set to Frame Size | Right-click the clip |
| Change the whole project's size | Sequence Settings | Best done before you start editing |
| Make a vertical or square version | Auto Reframe Sequence | Creates a new sequence, original untouched |
| Reformat a complex edit by hand | Nested sequence | Full manual control |
Premiere's right-click menu has two options that sound alike but treat your pixels very differently. For example, you have a 4K footage in a 1080p timeline. Scale to Frame Size resamples the clip down to 1080p, so the extra three-quarters of the pixels are thrown away and you're left with 1080p media in your project. Set to Frame Size keeps every pixel of the source and simply sets Scale to 50% so the clip fits. You can change that Scale value whenever you like, for example to zoom in without losing detail. Use Set to Frame Size unless you're sure you'll never zoom or reposition that clip. Method 2 below shows how.
Common Platform Sizes
Before you create a sequence or export your video, know the exact dimensions your target platform requires. Getting this wrong means black bars, forced cropping, or quality degradation after upload.
| Platform | Ratio | Size |
|---|---|---|
| YouTube | 16:9 | 1920 × 1080 (3840 × 2160 for 4K) |
| TikTok, Reels, Shorts | 9:16 | 1080 × 1920 |
| Instagram square | 1:1 | 1080 × 1080 |
| Instagram portrait | 4:5 | 1080 × 1350 |
The same ideas apply in other editors. See our guide to changing aspect ratio in DaVinci Resolve if you work in both.
Scale a Clip in Effect Controls
This method comes in handy when you want to manually control exactly how large a clip appears in your sequence — for example, scaling up a 4K clip for creative zoom, or making a smaller clip fill the frame.
Click on the clip you want to resize in the Timeline.
At the top of Premiere Pro, click Effects from the workspace tabs (or go to Window > Effect Controls). This opens the Effect Controls panel where all motion properties for the selected clip are displayed.
In the Effect Controls panel, click the arrow next to Motion to expand it. You'll see Scale, Position, Rotation, and Anchor Point options.
Drag the Scale value or type a number. 100 is the clip at its own size. Uniform Scale is on by default and keeps the proportions. Uncheck it to change width and height separately.
If you've scaled the clip down and want to reposition it within the frame, adjust the Position X and Y values. You can also drag the clip directly in the Program Monitor while in Effect Controls.
Going above 100 enlarges the clip, and if the footage isn't higher resolution than your sequence, it will look softer. Going below 100 shrinks it and shows the background behind it. Adobe documents each parameter in its reference on the Motion effect.
Fit Clips to the Sequence with Set to Frame Size
This is the recommended method when you have clips from different cameras or resolutions in the same timeline. Premiere Pro adjusts the Scale value to fit the clip to your sequence frame, but leaves the original footage unchanged.
Click one clip, hold Shift to add more, or press Ctrl/Cmd + A to select everything in the Timeline.
Right-click on the selected clip(s) in the Timeline. From the context menu, choose Set to Frame Size. The clip will instantly resize to fit within your sequence frame.
After applying Set to Frame Size, open Effect Controls > Motion > Scale. You'll see that Premiere Pro has set Scale to a specific value (e.g., 50% for a 4K clip in a 1080p sequence) — this is the exact scale needed to fit the clip, and it's fully adjustable.
Scale to Frame Size is the other option in the same menu. It resamples the clip to the sequence size, so a 4K clip in a 1080p timeline becomes 1080p media and the extra pixels are discarded. Set to Frame Size doesn't do that, which is why it's the one to use.
Change the Sequence Size
This method is recommended when you want to fundamentally change what size your project is working at — for example, switching from a 1080p sequence to a 4K sequence, or creating a new sequence at a specific resolution for a platform before you start editing.
With the sequence active, go to Sequence → Sequence Settings. This opens the sequence properties dialog — Adobe's guide to sequence settings covers each field.
Under the Video section, you'll see Frame Size with horizontal and vertical pixel fields. Change these to your desired resolution — for example, 3840 × 2160 for 4K or 1080 × 1920 for vertical 9:16.
Click OK to apply. Review your clips in the Program Monitor — you'll likely need to reapply Set to Frame Size to any clips that are now the wrong size for the new sequence dimensions.
Changing the size of a sequence you've already cut can shift or crop your clips. For a different-shaped version of a finished edit, make a new sequence instead (Methods 4 and 5).
Auto Reframe: 16:9 to Vertical Without Re-editing
Auto Reframe is an AI-powered tool in Premiere Pro that detects and tracks the primary subject in a clip and repositions the frame automatically when you change the aspect ratio. Instead of manually keyframing every clip's position when you convert a finished YouTube edit to a TikTok short, Auto Reframe handles it automatically. Adobe's Auto Reframe overview explains how it works.
It's not perfect on complex shots with multiple subjects or rapid chaotic movement — but on talking heads, interviews, B-roll with a clear subject, and most social media content, it eliminates the majority of manual work. If you'd rather start from a ready-made vertical template, check out the resources available on Motion Array platform.
Make sure your finished sequence is active in the Timeline. It works best on an edit that's locked, not a rough cut you're still changing.
From the top menu, click Sequence > Auto Reframe Sequence. A dialog box will appear with aspect ratio presets.
Choose a ratio, such as Vertical 9:16. For motion, Slower Motion suits talking heads, and Faster Motion suits action. Then click Create.
Premiere Pro creates a new sequence at the target aspect ratio with Auto Reframe applied to each clip. Your original sequence is untouched. Review the new sequence in the Program Monitor.
Auto Reframe isn't perfect. Scrub through the new sequence and check each clip. For any that are incorrectly framed, select the clip, go to Effect Controls > Auto Reframe, and manually adjust the keyframes for that clip's positioning.
Nested Sequence: Full Manual Control
If Auto Reframe isn't giving you the framing you want, or your edit has graphics and effects that don't carry over cleanly, nesting gives you control without touching the original.
Select everything in the Timeline, right-click and choose Nest. Name it something clear, such as "Original 16:9 edit".
Go to File → New → Sequence and set the frame size, for example 1080 × 1920.
Drag the nested sequence into the new one and use Scale and Position in Effect Controls to frame it, or Set to Frame Size as a starting point.
Export at the Right Size
The export settings decide the final file. If they don't match your sequence, you can end up with black bars or a different size than you planned.
Press Ctrl/Cmd + M or go to File → Export → Media.
It's the standard format for YouTube, Instagram, TikTok and most web platforms.
They should match your sequence and the platform you're posting to, such as 1080 × 1920 for vertical.
Click Export, or Queue to send it to Media Encoder so you can keep editing.
When It Looks Wrong
I have black bars on the top and bottom, or the sides
The clip's shape doesn't match the sequence. A 16:9 clip in a square or vertical sequence leaves bars above and below, and a vertical clip in a 16:9 sequence leaves bars at the sides. To fill the frame, scale the clip up in Effect Controls, which crops some of the picture, and use Position to keep the subject in view.
The clip looks soft after I scaled it up
Enlarging a clip past its own resolution makes it softer, because the editor has to invent pixels. If you're zooming into a 4K clip inside a 1080p sequence, you have room to zoom before you lose detail. If you're zooming into footage that's already the same size as the sequence, you don't.If you used Scale to Frame Size earlier, the extra detail was discarded at that point, so zooming in won't bring it back.
My export isn't the size I expected
Check Width and Height in Export Settings, and make sure the sequence itself is the size you intended in Sequence → Sequence Settings. If you're exporting from a different sequence than the one you resized, check which one is active.
Auto Reframe cropped my subject out
Try a different motion preset (Slower Motion suits talking heads). If a clip is still wrong, select it and adjust its position by hand in Effect Controls, or use the nested sequence method for that part of the edit.
FAQ
What's the difference between Scale to Frame Size and Set to Frame Size?
Scale to Frame Size resamples the clip to the sequence resolution — a 4K clip in a 1080p timeline becomes 1080p media and the extra pixels are discarded. Set to Frame Size keeps every pixel of the source and sets Scale to the value needed to fit the clip, so you can zoom or reposition later without losing detail. Use Set to Frame Size in almost every situation.
How do I make a video vertical for TikTok or Reels?
Use Sequence → Auto Reframe Sequence and choose Vertical 9:16. For more control, create a new 1080 × 1920 sequence, nest your original edit, drag it in, and frame it by hand.
Can I change the aspect ratio without re-editing everything?
Yes. Auto Reframe Sequence makes a new sequence at the new ratio and leaves your original alone. The nested sequence method does the same with manual control.
Does resizing reduce quality?
Enlarging a clip past its native resolution always costs detail. Shrinking a clip to fit the frame generally doesn't, as long as you keep working from the original footage.
Can I resize several clips at once?
Yes. Select them in the Timeline, right-click, and choose Set to Frame Size. Scale changes made in Effect Controls apply to the selected clip.
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