Free Video Resizer: Crop and Reframe for TikTok, Reels and Shorts
Resize video to 9:16, 1:1, 4:5 or 16:9. Follow faces with Smart Reframe, replace black bars with a blurred background, and shrink to a target file size. Nothing is uploaded and nothing is watermarked.
Free video resizer. Resize, crop and reframe for TikTok, Reels, Shorts and YouTube. Runs on your device, no upload, no watermark.
Pro tip: Close other tabs and plug in your device for the fastest rendering. Shrinking is fast, but large sizes and 60fps take longer.
Video Resizer
Pick a size, drop your video. Smart Reframe keeps faces in frame, Fit + Blur removes black bars, Target Size shrinks to MB limits.
Drag and drop works too. Up to 500 MB. Nothing is uploaded.
What is the ToolDeck Video Resizer?
ToolDeck Video Resizer is a free browser tool that changes a video's dimensions or aspect ratio. Pick a preset such as 1080x1920 (9:16) for TikTok, Reels and Shorts, choose Fill, Fit + Blur or Fit + Color, and export an MP4 or WebM. Smart Reframe can follow a face while cropping landscape video to portrait, and Target File Size can shrink the result to 8, 16, 25 or 50 MB. Everything runs on your device, so nothing is uploaded and there is no watermark.
| Feature | Details |
|---|---|
| Price | Free. No account, no watermark, no trial limits |
| Upload required | No. Video is processed locally in your browser |
| Input formats | MP4, WebM, MOV and other formats your browser can play |
| Output formats | MP4 (H.264) and WebM (VP9) |
| Fit modes | Fill (crop), Fit + Blur, Fit + Color, Stretch |
| Smart Reframe | Face tracking that pans the crop; works with Fill |
| Target file size | 8, 16, 25 or 50 MB (best effort, one automatic retry) |
| Multi-ratio export | 9:16, 1:1, 4:5 and 16:9 in one ZIP |
| Frame rate | Original, 24, 30 or 60 fps |
| File limits | Up to 500 MB on desktop, 150 MB on phones |
| Max output | 4K (3840x2160) on desktop, about 1440p on phones |
| Browser support | Chrome and Edge (best), Safari 16.4+ (WebCodecs required) |
Best video sizes for TikTok, Reels, Shorts and YouTube
These are the commonly recommended upload sizes. Platforms update their specifications from time to time, so check the app if you need an exact requirement.
| Platform | Size (px) | Ratio | Note |
|---|---|---|---|
| TikTok | 1080 x 1920 | 9:16 | Keep captions and faces away from the bottom and right edges where the interface sits. |
| Instagram Reels | 1080 x 1920 | 9:16 | Keep key content in the central area; the caption area covers the bottom. |
| YouTube Shorts | 1080 x 1920 | 9:16 | Shorts use the full vertical frame with buttons on the right and a title at the bottom. |
| Instagram feed (portrait) | 1080 x 1350 | 4:5 | Takes the most feed space of the standard feed formats. |
| Instagram / Facebook feed (square) | 1080 x 1080 | 1:1 | Safe everywhere; works well for ads and carousels. |
| YouTube (standard) | 1920 x 1080 | 16:9 | Full HD landscape. |
| YouTube (4K) | 3840 x 2160 | 16:9 | Desktop only in this tool; large files and long renders. |
| X (Twitter) | 1280 x 720 | 16:9 | A common landscape size for timeline video. |
How to resize a video for social media
- 1
Choose a target size
Pick a preset such as TikTok / Reels / Shorts (1080x1920, 9:16), Instagram Square (1080x1080), Instagram Portrait (1080x1350) or YouTube (1920x1080). Or choose Custom and type a width and height.
- 2
Add your video
Drag and drop an MP4, WebM or MOV file, or tap Select Video. The video is read locally and its frame rate is detected automatically.
- 3
Pick a fit mode
Use Fill to crop the video to cover the frame, Fit + Blur to keep the whole picture over a blurred backdrop, Fit + Color for solid bars, or Stretch to force the exact size.
- 4
Turn on Smart Reframe if needed
When converting landscape to portrait with Fill, switch on Smart Reframe so the crop follows the main face. If no face is found, use the Horizontal and Vertical position sliders instead.
- 5
Trim, set quality and file size
Optionally trim the clip, choose MP4 or WebM, quality, frame rate and a target file size such as 16 MB.
- 6
Export and download
Press Export Video. The file is rendered locally, then a Download button appears. Nothing leaves your device.
Which settings should I use?
Landscape interview to a TikTok, Reel or Short
Preset: TikTok / Reels / Shorts. Fit & Frame: Fill, Smart Reframe on. Export: MP4, High, original fps.
Keep the whole frame vertical, no cropping
Preset: TikTok / Reels / Shorts. Fit & Frame: Fit + Blur. Export: MP4, High.
Send a clip under a messaging or email size limit
Pick a smaller preset (720p or 1080p) first, then Export: Target file size 16 MB or 25 MB. Shorter clips keep better quality at a given size.
Make one video for every platform
Fit & Frame: choose a mode. Export: switch on Export all ratios. You get a ZIP with 9:16, 1:1, 4:5 and 16:9 versions.
Shrink a 4K file for easier sharing
Preset: YouTube / Landscape (1920x1080). Export: MP4, High or Good. Downscaling is fast and keeps the framing.
Fit modes explained
| Mode | What it does | Best for |
|---|---|---|
| Fill (Crop) | Scales the video to cover the whole frame and crops whatever overflows. | Best when you want no empty space, for example a landscape clip made vertical. |
| Fit + Blur | Keeps the entire video visible and fills the empty area with a blurred, enlarged copy. | The look commonly used on social apps. Keeps all the context with no black bars. |
| Fit + Color | Keeps the entire video visible with solid color bars. | Clean letterboxing or branded backgrounds. |
| Stretch | Forces the video to the exact size and ignores the original ratio. | Only for a deliberate distortion effect. Faces and shapes will look wrong. |
| Smart Reframe | Fill mode where the crop pans to follow the main face, smoothed so it does not jitter. | Interviews, podcasts and talking-head clips turned into Shorts or Reels. |
Local resizer vs typical cloud resizers
Many online resizers upload your file to a server. This tool does the work on your own device, which changes what you give up and what you gain.
| ToolDeck (local) | Typical cloud tool | |
|---|---|---|
| Upload to a server | No | Usually yes |
| Watermark | None | Often on the free tier |
| Account required | No | Often |
| Works after the page loads without internet | Yes, once loaded | No |
| Face-following crop | Yes (Smart Reframe) | Sometimes paid |
| Speed on large files | Depends on your device | Depends on upload speed and queue |
| Max file size | 500 MB desktop, 150 MB phone | Varies, often lower on free plans |
Limits and things to know
- Export needs the WebCodecs API (Chrome, Edge, Safari 16.4+). Browsers without it cannot export.
- Speed depends on your device. 4K and 60 fps are heavy, and phones are slower than desktops.
- Making a video larger than its source (for example cropping 1080p to a tight vertical frame) cannot add detail. Use Fit + Blur, or try the Video Upscaler.
- Target File Size is best effort. Very small targets for long or high-resolution clips will look soft, so lower the resolution first.
- Smart Reframe needs a visible face. Clips with no face fall back to the manual position sliders.
- Safe zone overlays are approximate. Apps change their interface layouts, so leave some margin.
Not working as expected? Try these fixes
Export fails or stays at 0%
Use Chrome or Edge, or Safari 16.4 or newer, and keep the tab open and visible. Close other tabs, then try a lower resolution or 30 fps.
The result looks soft or stretched
Check the fit mode: Stretch distorts, and tight Fill crops enlarge the picture. Try Fit + Blur or a lower zoom.
Smart Reframe is not following the subject
It needs a visible face. If the person is small, turned away or hidden, use the Horizontal and Vertical sliders for a fixed crop.
My file is rejected as too large
The limit is 500 MB on desktop and 150 MB on phones. Trim the clip first, or use a desktop browser.
The exported file is still too big
Open the Export tab, choose a Target file size, and lower the resolution or frame rate if the result still looks heavy.
There is no sound in the result
Check that Include audio is on. If the browser cannot decode the original audio codec, the export has no sound and the app tells you.
On iPhone the video opens in a player instead of saving
Tap the Share button, then Save Video.
Video resizing glossary
- Aspect ratio
- The proportion of a video's width to its height, such as 16:9 (landscape) or 9:16 (vertical).
- Smart Reframe
- A crop that follows the main subject, here a detected face, so it stays in frame after changing the aspect ratio.
- Letterboxing
- Empty bars above and below, or beside, a video that does not match the frame's aspect ratio.
- Safe zone
- The part of a vertical video that is not covered by an app's buttons, captions or profile elements.
- Bitrate
- How much data is used per second of video. Higher bitrate means better quality and larger files.
- WebCodecs
- A browser API that lets a web page encode and decode video using the device's own codecs, which makes local export possible.
Video Resizer FAQ
Is this video resizer free?
Yes. It is free, needs no account, adds no watermark and does not upload your video.
What is the best video size for TikTok, Instagram Reels and YouTube Shorts?
1080 x 1920 pixels (9:16) is the commonly recommended size for all three. The TikTok / Reels / Shorts preset applies it and can show approximate safe zones for each app's interface.
How do I change a video from 16:9 to 9:16 without cutting the person out?
Choose the 9:16 preset, use Fill, and turn on Smart Reframe so the crop follows the face. Or use Fit + Blur to keep the whole frame visible over a blurred background.
How do I make a video smaller in MB?
Open the Export tab and pick a Target file size (8, 16, 25 or 50 MB). The tool sets the bitrate for your clip length and retries once if the first result is too big. Lowering the resolution or trimming the clip also helps.
How do I add a blurred background instead of black bars?
In the Fit & Frame tab choose Fit + Blur and adjust the blur strength. The whole video stays visible and a blurred enlarged copy fills the empty area.
Is my video uploaded to a server?
No. Video is decoded, resized and encoded in your browser on your own device. After the page and its helper files have loaded, the processing itself does not need a network connection.
Does it work on iPhone and Android?
Yes, on current Safari (16.4+) and Chrome. Phones are limited to 150 MB files and about 1440p output, and are slower than a desktop. For the fastest export use Chrome or Edge on a computer.
Which browsers are supported?
Chrome and Edge give the best results, and Safari 16.4 or newer works. The tool needs the WebCodecs API for export, so browsers without it can preview but not export.
What output formats can I export?
MP4 with H.264 video, or WebM with VP9 video. Both can include audio when your browser can encode it.
Can I trim the video?
Yes. Move the playhead and use Set start here and Set end here in the Export tab. Only the trimmed part is exported.
Can I export several sizes at once?
Yes. Turn on Export all ratios to get 9:16, 1:1, 4:5 and 16:9 versions in one ZIP file. The tool resizes one source video at a time.
What is the maximum file size and resolution?
Desktop: files up to 500 MB and output up to 4K (3840x2160). Phones: files up to 150 MB and output up to about 1440p, to avoid running out of memory.
Will the frame rate change?
By default the original frame rate is kept. You can also choose 24, 30 or 60 fps. Choosing a higher rate than the source does not add real detail.
What are safe zones?
They show roughly where an app's buttons, captions and profile elements cover a vertical video. Keep faces and text inside the clear area. They are approximate because apps change their layouts.
Why is the result blurry?
Cropping a video tightly enlarges the picture, which can make it look soft, and a low target file size reduces detail. Try Fit + Blur, a higher quality setting, or a larger target size.
Can I use the videos I make commercially?
The tool adds no watermark and claims no rights over your output. You remain responsible for rights to the original footage and any music in it.
Your video stays on your device
There is no upload step and no account. Decoding, cropping and encoding happen in your browser. The Smart Reframe face model is downloaded once and then runs locally, so your footage is not sent to a server. Read how we keep it private.
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