Video Resizer

Drop your video here or click to browse

Supports MP4, WebM, MKV up to 500MB

How to Resize a Video Online

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.
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.
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.
Resize and Download

Click Resize Video to start processing. The clip plays through once while it is re-recorded, so allow about its own running time. Once complete, click Download to save the resized video in WebM format. No account or signup required.

Common Use Cases

Social Media Publishing

Resize videos to match the exact dimensions required by YouTube (1920x1080), Instagram Reels (1080x1920), TikTok (1080x1920), or Twitter/X (1280x720) without installing any software.

Reducing File Size for Sharing

Downscale high-resolution footage to 720p or 480p to reduce file size before sharing via email, messaging apps, or cloud storage where upload limits apply.

Presentation and Training Videos

Resize screen recordings or training clips to a consistent resolution so they display uniformly in slide decks, LMS platforms, or embedded web players.

Thumbnail and Preview Generation

Scale videos down to small dimensions for use as animated previews, hover thumbnails, or portfolio samples that load quickly on any device.

Why use our Video Resizer?

Our video resizer makes it easy to change video resolution for different purposes. Whether you need to downscale for faster uploads, upscale for presentations, or fit specific platform requirements, our tool handles it all. Choose from common presets like 1080p, 720p, or social media formats, or enter custom dimensions. The aspect ratio lock helps prevent distortion when resizing. All processing happens in your browser: each frame is drawn onto a canvas at the new size and captured by the browser's MediaRecorder. That recorder runs in real time, so a one-minute clip takes about a minute and the result is a WebM file.

The FindUtils Video Resizer is a browser-based tool that changes video resolution on your own device. 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 output and routes uploads through their servers. VEED.IO offers a clean UI but limits 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 speed: the resizer re-records the clip through MediaRecorder in real time, so processing takes about as long as the video plays, while a server-side tool with dedicated hardware can encode faster than real time. For most social media clips, presentations, and short-form content, that is a short wait and far more private.

Tips for Better Results

Always keep the aspect ratio locked when downscaling to avoid distortion. Unlock it only when you intentionally need a different shape.
Downscaling from 4K to 1080p produces sharper results than upscaling from 480p to 1080p, because enlarging adds interpolated pixels.
For social media, use the built-in presets instead of guessing dimensions. Platform requirements change, and presets stay current.
If your resized video looks too large in file size, run it through a video compressor afterward to optimize the bitrate.
Resizing records in real time, so a clip takes roughly its own length to process. For videos longer than a few minutes, trim first with the Video Trimmer.

Frequently Asked Questions

What resolutions can I resize to?

You can choose from presets including 4K (3840x2160), 1080p (1920x1080), 720p (1280x720), 480p (854x480), 360p (640x360), Square (1080x1080), and Instagram Story (1080x1920), or enter any custom width and height.

Will resizing affect video quality?

Yes, and the direction matters. Downscaling typically maintains good visual quality because you are reducing pixel count. Upscaling may introduce softness or artifacts because the browser interpolates new pixels that did not exist in the original footage.

Can I change the aspect ratio?

Yes, disable the aspect ratio lock to resize to any dimensions. Keep in mind that changing the aspect ratio will stretch or squish the image. If you want to crop instead, consider using a dedicated video cropping tool.

What output format is used?

Resized videos are output in WebM format, which offers good compression and is supported by all modern browsers. If you need MP4 or another format, run the output through the Video Format Converter.

Are my videos uploaded to a server?

No. The resizer draws each frame onto a canvas and records it with the browser's MediaRecorder, and your video file never leaves your device. The page loads ad and analytics scripts as most sites do, and they never see your file.

Is there a file size limit?

Yes. The tool accepts files up to 500 MB and rejects anything larger before reading it. Within the cap, time bites before size does: the clip is re-recorded in real time, so a ten-minute video takes about ten minutes.

What is the best resolution for Instagram Reels and TikTok?

Both platforms recommend 1080x1920 pixels (9:16 portrait). Use the Instagram Story preset to match this resolution exactly. Videos uploaded at the correct dimensions avoid platform re-encoding, which preserves quality.

Can I resize multiple videos at once?

No. The tool processes one video at a time. Upload, resize, and download each file individually. For batch operations on many files, desktop software like HandBrake or FFmpeg may be more efficient.

Does resizing reduce the file size?

Yes, usually. Downscaling to a lower resolution reduces file size because fewer pixels means less data. However, the exact reduction depends on the codec, bitrate, and content complexity. For maximum compression, use the Video Compressor after resizing.

Does the video resizer require a signup?

No. The FindUtils Video Resizer is free, with no watermarks, no signup, and no usage limits. It works in any modern browser on desktop or mobile.