Convert video aspect ratios for TikTok, Instagram Reels, YouTube Shorts. Crop, pad or stretch. Drag-to-crop preview. No watermark, no signup.
Click or drag & drop video
MP4, MOV, AVI, WebM
A video aspect ratio converter changes the width-to-height ratio of your video so it fits perfectly on different platforms. Every social media platform has its own required ratio — TikTok and Instagram Reels need 9:16 vertical, YouTube needs 16:9 horizontal, Instagram feed posts need 1:1 square or 4:5 portrait. Without converting, your video gets auto-cropped by the platform — often cutting out the most important parts.
Our free online tool lets you convert any video to any aspect ratio in your browser — no software to install, no watermark, no file upload to any server. Everything runs locally on your device.
A tech YouTuber had 200+ videos in 16:9 format. To grow on TikTok, they needed 9:16 vertical clips. Using our drag-to-crop feature, they could precisely frame each clip — keeping the speaker's face centered — and convert in seconds. No need for Premiere Pro or CapCut. The blur background pad mode was used for clips where the subject was centered, giving a professional look without black bars.
An online store had product demo videos in 16:9. Instagram feed requires 1:1 or 4:5 for maximum screen real estate. They used the custom crop resize handles to manually frame the product perfectly in a 4:5 box, then converted. Result: 40% more impressions on Instagram feed posts because the video took up more vertical space.
A wedding videographer needed to deliver the same highlight reel in 16:9 (for TV/YouTube), 9:16 (for Instagram Stories), and 1:1 (for Facebook). Instead of re-editing three times in Premiere, they used our tool to convert the master 16:9 file into all three formats in under 5 minutes. The interactive crop preview ensured the couple's faces were always in frame.
An indie filmmaker shot in standard 16:9 but wanted a cinematic 21:9 ultrawide look for their short film trailer. Using the 21:9 crop mode with custom crop positioning, they cropped the top and bottom to create the letterbox effect — giving the trailer a big-screen cinematic feel without any post-production software.
Click the upload area or drag & drop your video file. Supports MP4, MOV, AVI, WebM. Your file never leaves your device — all processing happens in your browser.
Choose from 16:9 (YouTube), 9:16 (TikTok/Reels), 1:1 (Instagram Square), 4:5 (Instagram Portrait), 4:3 (Classic TV), or 21:9 (Cinematic). The crop box automatically adjusts to the selected ratio.
Crop mode fills the frame by cutting edges. Pad mode adds bars or blur background to fit without cutting. Stretch mode forces the ratio but may distort the video.
Click "Show Crop Area" to see the interactive preview. Drag the green crop box to reframe your shot. Pull the white circle handles on the edges and corners to resize the crop area freely.
Click Convert. The video is processed entirely in your browser using FFmpeg WebAssembly. When done, preview the output and download your converted video — no watermark.
Drag the crop box directly on the video preview. See exactly what will be cut before converting.
Pull the 8 handles on the crop box to freely resize width and height — not locked to any ratio.
Pad videos with a blurred version of themselves — the Instagram/TikTok style used by top creators.
16:9, 9:16, 1:1, 4:5, 4:3, 21:9 — covers every major platform and use case.
No file upload. Everything runs in your browser. Your video never touches any server.
Optimised FFmpeg.wasm pipeline with ultrafast preset and smart resolution capping for quick output.
Output video is completely clean — no branding, no watermark, no logo overlay.
Touch drag support on the crop canvas. Works on phones and tablets.
A faint 3×3 composition grid appears while dragging to help you frame shots perfectly.
| Platform | Recommended Ratio | Resolution | Use Case |
|---|---|---|---|
| TikTok | 9:16 | 1080×1920 | Full screen vertical video |
| Instagram Reels | 9:16 | 1080×1920 | Full screen vertical video |
| Instagram Feed | 1:1 or 4:5 | 1080×1080 / 1080×1350 | Square or portrait feed post |
| YouTube | 16:9 | 1920×1080 | Standard landscape video |
| YouTube Shorts | 9:16 | 1080×1920 | Vertical short-form video |
| Facebook Feed | 4:5 or 1:1 | 1080×1350 / 1080×1080 | Portrait or square feed video |
| Twitter / X | 16:9 | 1920×1080 | Landscape tweet video |
| Cinema / Film | 21:9 | 2560×1080 | Ultrawide cinematic look |
Yes, 100% free. No signup, no subscription, no hidden fees. You can convert unlimited videos.
No. All processing happens entirely in your browser using WebAssembly (FFmpeg.wasm). Your video file never leaves your device. This also means it works offline once the page is loaded.
No watermark at all. The output video is completely clean.
Crop cuts the edges of your video to fill the new ratio — some content is lost. Pad adds black bars or a blurred background to fill the empty space — no content is lost. Stretch forces the video into the new ratio by distorting it — not recommended for most use cases.
Upload your video, select "9:16 (TikTok/Reels)" as the target ratio, choose Crop mode, then click "Show Crop Area" to drag the crop box and frame your subject. Click Convert and download.
Yes. When the crop preview is open, drag the white circle handles on the edges and corners of the green crop box to freely resize it to any width and height you want.
Video conversion runs in your browser using WebAssembly, which is slower than native desktop software. Conversion speed depends on your device CPU, video length, and resolution. Shorter and lower-resolution videos convert much faster.
Input: MP4, MOV, AVI, WebM and most common video formats. Output is always MP4 (H.264) for maximum browser and platform compatibility.
| Feature | ToolsWallet | Other Online Tools | Desktop Software |
|---|---|---|---|
| Free to use | ✅ | ⚠️ Limited | ❌ Paid |
| No watermark | ✅ | ❌ Watermark | ✅ |
| No file upload / Private | ✅ | ❌ Uploads to server | ✅ |
| Drag-to-crop preview | ✅ | ❌ | ✅ |
| Custom crop resize handles | ✅ | ❌ | ✅ |
| Blur background pad mode | ✅ | ⚠️ Some | ✅ |
| No signup required | ✅ | ⚠️ Some require | ❌ |
| Works in browser | ✅ | ✅ | ❌ |