Drop your video here or click to browse
Supports MP4, WebM, MKV up to 500MB
How to Resize a Video Online
- 1
Upload Your Video
Drag and drop your video file or click the upload area to browse. The tool supports MP4, WebM, and MKV formats up to 500 MB. - 2
Choose a Resolution
Select a preset resolution such as 4K, 1080p, 720p, or a social media format like Instagram Story (1080x1920). Alternatively, enter custom width and height values. - 3
Adjust Settings
Toggle the aspect ratio lock to maintain proportions or disable it to stretch the video to exact dimensions. Preview the output size before processing. - 4
Resize and Download
Click Resize Video to start processing. Once complete, click Download to save the resized video in WebM format. No account or signup required.
Common Use Cases
Social Media Publishing
Reducing File Size for Sharing
Presentation and Training Videos
Thumbnail and Preview Generation
Why use our Video Resizer?
The FindUtils Video Resizer is a free browser-based tool that lets you change video resolution in seconds. Whether you need to downscale 4K footage for faster uploads or resize a clip to fit Instagram, TikTok, or YouTube requirements, everything runs locally on your device using the MediaRecorder API and the Canvas API. No video data is uploaded to any server, making it a private and secure alternative to cloud-based resizers.
Platform-specific quality matrix. Each social network expects a different aspect ratio, resolution, and codec. Instagram Reels and Stories use 1080×1920 (9:16, vertical) up to 60s. TikTok matches Instagram's 1080×1920 with up to 10-minute clips and prefers H.264 in an MP4 container. YouTube Shorts uses 1080×1920; standard YouTube uses 1920×1080 (16:9, horizontal) with H.264 or VP9 — see Google's recommended upload encoding settings. X (formerly Twitter) caps native uploads at 1280×1024 (16:9 for video). LinkedIn supports up to 1920×1920 (square) with a 5GB limit. Use the platform presets in this tool to match each spec without memorizing the matrix.
Codec choices: WebM vs MP4. This tool outputs WebM (a royalty-free container designed by Google with VP8 or VP9 video and Vorbis or Opus audio) because it's the format the MediaRecorder API produces in-browser without external libraries. WebM gets better compression than H.264 at equivalent quality and is supported natively in Chrome, Firefox, Edge, and most Android players. If you need MP4 specifically (for AirDrop, iPhone Photos, or older platforms), pass the result through a separate transcoder. The AV1 codec from the Alliance for Open Media offers another 30% size reduction over VP9 but encoding is too slow for in-browser use today.
The tool ships with presets for the most popular resolutions and social media platforms, but you can also enter custom width and height values for full control. An aspect ratio lock prevents accidental stretching, and you can preview the final dimensions before processing. Output is delivered in WebM format with good compression and broad browser support. For further optimization, you can pass the result through the Video Compressor or convert it to another container with the Video Format Converter.
Need to do more than just resize? Combine this tool with the Video Trimmer to cut length, the Video Rotator to fix orientation, or the Video to GIF converter to create animated previews. For images, the Image Resizer and Social Media Image Resizer offer the same privacy-first experience with presets tailored to every major platform.
How It Compares
Kapwing requires sign-up, watermarks free-tier exports, and caps free uploads at 250MB. Clideo watermarks free output and routes uploads through their servers. VEED.IO offers a clean UI but limits free exports to 720p with a 10-minute cap. EZGIF's video resizer handles only short clips and adds compression artifacts on resize. HandBrake (desktop) is powerful but requires installation, has a steep learning curve, and is overkill for a quick aspect-ratio change. The FindUtils Video Resizer processes everything in your browser with zero uploads, no watermarks, no signup, and no usage limits.
Because processing is client-side, your video never leaves your device, which makes this tool ideal for confidential or sensitive footage. The tradeoff is that very long videos (over 10 minutes) may take longer to process compared to server-side tools with dedicated hardware. For most social media clips, presentations, and short-form content, browser-based resizing is more than fast enough and far more private.