How to check a video's resolution and bitrate
- Drop a video into the box to inspect it.
- Read the summary cards and the details table: duration, resolution and quality label, aspect ratio, size, bitrate and audio track.
- For a contact sheet, choose a 3 × 3, 4 × 4 or 5 × 5 grid, a thumbnail width and JPG or PNG.
- Click Generate contact sheet, review it, and click Download.
What you can do with Video Info & Contact Sheet
- Key specs at a glance
- Duration, resolution, aspect ratio, file size and average bitrate appear as summary cards the moment the video loads.
- Resolution labels
- Each video is labeled 4K UHD, 1440p, 1080p Full HD, 720p HD, 480p or lower, and vertical videos are flagged.
- Named aspect ratios
- Common ratios like 16:9, 9:16, 4:3, 21:9 and 2.39:1 are recognized, alongside the exact reduced ratio.
- Contact sheet export
- Generate a 9, 16 or 25 thumbnail grid spread evenly through the video, each stamped with its timestamp.
- Labeled header
- The contact sheet includes the file name, duration, resolution and size, so it works as a quick reference or preview image.
Video resolution, aspect ratio and bitrate explained
Checking a video's specs before you upload or edit saves time. Platforms recommend specific formats: YouTube suggests 1920 × 1080 or 3840 × 2160 in 16:9, while Reels, TikTok and Shorts expect vertical 1080 × 1920 (9:16). Resolution tells you the pixel size, and the aspect ratio tells you whether the platform will add black bars or crop. Duration matters for upload caps, and file size for email or chat limits. This tool reads those values from your browser's video decoder.
Average bitrate is calculated as file size divided by duration, so it includes both video and audio and represents the whole file rather than the video stream alone. As a rough guide, 1080p web video usually sits between 5 and 12 Mb/s and 4K between 20 and 50 Mb/s; much lower values suggest heavy compression. The browser doesn't expose the codec or frame rate, so those aren't shown. A contact sheet gives a one-image overview of a whole video, useful for cataloging footage, sharing a preview with a client, or quickly spotting scene changes.
Frequently asked questions
Is my video uploaded to read its information?
No. The video is opened by your browser's built-in player, which reports its duration and dimensions locally. The contact sheet is drawn on a canvas on your device. Nothing is uploaded, so large or private files are fine.
How do I check a video's resolution?
Drop the video in and look at the Resolution card, for example 1920×1080. The details table adds a label such as 1080p Full HD or 4K UHD and notes if the video is vertical. This is the actual encoded size, not the size of the player window.
How is the bitrate calculated?
The tool divides the file size in bits by the duration in seconds. That gives the average total bitrate for video and audio combined. Containers add a little overhead, so the video-only bitrate is slightly lower than the figure shown.
Does it show the codec and frame rate?
No. Browsers don't reveal the codec or frame rate of a local file to web pages, so the tool shows only what it can read reliably: duration, resolution, aspect ratio, size, average bitrate, audio track presence where supported, type and last modified date.
What is a video contact sheet?
A contact sheet is a single image with a grid of thumbnails taken at even intervals through the video, each labeled with its timestamp. It gives an instant overview of the content, which is handy for archives, client previews, or choosing which scene to extract.