Browser-onlyNo uploadsAlways free
About Us·Contact

100+ tools · No signup · Always free

Smart Video Optimizer

Reduce video size intelligently while maintaining quality. Optimize for YouTube, WhatsApp, websites, social media, and storage — all in your browser.

Browser ProcessingSmart CompressionYouTube ReadySocial Media PresetsNo Upload Required

How to use

1

Drop your video

Drag a video file onto the upload zone, or click to browse. MP4, MOV, AVI, MKV, and WEBM are all supported, up to 500 MB.

2

Pick a preset

Choose from 8 platform-tuned presets — Web, YouTube 1080p, WhatsApp, Email, Instagram Reel, TikTok, Mobile, or Custom. Each is pre-configured with the right bitrate and resolution.

3

Tune (optional)

Pick a quality mode (Max Compression / Balanced / High / Near-Lossless), override resolution, or open Advanced to set custom bitrate, audio bitrate, and frame rate.

4

Optimize & download

Click Optimize Video. Watch the live progress bar (encoding runs at roughly playback speed). When done, preview the before/after and download your optimized file.

When to optimize your videos

YouTube uploads

Hit YouTube's recommended upload bitrate exactly — uploads are faster, your channel uses less storage, and quality is preserved through YouTube's own re-encoding.

WhatsApp & messaging

Squeeze videos under WhatsApp's 16 MB direct-send limit. The WhatsApp preset is tuned to fit a 1-minute clip comfortably without resorting to obvious quality loss.

Embedding on websites

Inline videos that load in seconds, not minutes. Web Optimized preset targets ~2.5 Mbps — fast on broadband, watchable on 4G, and easy on your hosting bill.

Social media reels

Get to Instagram, TikTok and YouTube Shorts under their file caps without quality penalty. The Reel preset matches platform encoding targets for the cleanest re-upload.

Email attachments

Email's 25 MB attachment limit makes most raw video unsendable. The Email preset shrinks short clips below it so you can attach them directly instead of using share links.

Storage & archives

Cut years of phone-recorded videos down to a fraction of their current size before backing up. Saves disk, cloud storage cost, and backup time.

How it works

Browser-native encoder

Uses the MediaRecorder API + Canvas to re-encode your video entirely in the browser. No FFmpeg WASM payload, no SharedArrayBuffer headers, no 30 MB downloads before you can start.

Size predictor

Before you encode, the tool computes the expected output size from your target bitrate × duration. Lets you compare presets and tweak settings without wasting a full encode pass.

Canvas + capture

Source video draws frame-by-frame into a target-sized canvas, the canvas captures as a video stream, and MediaRecorder writes a new file at the chosen bitrate — all in real-time.

100% browser-side

Your video never leaves your device. No upload to a server, no temporary cloud storage, no third parties involved. Close the tab and every trace is gone.

Related tools

Compress Image

Shrink JPG, PNG and WebP images to a target file size without quality loss.

YouTube Thumbnail Downloader

Download YouTube thumbnails in all available sizes from any video URL.

Social Media Resizer

Crop and resize images for every social platform's exact dimensions.

Thumbnail Studio

Design eye-catching custom thumbnails for your YouTube videos.

Frequently asked questions

Quick answers about this free online tool.

All compression that reduces file size affects quality at the pixel level — but with good settings, the loss is invisible to most viewers. This tool uses VP9 or H.264 codecs (depending on your browser) which are highly efficient: at the 'Balanced' quality setting you typically save 60–80% of the file size with no perceptible quality loss for normal viewing. Picking 'Max Compression' trades visible quality for the smallest file possible.

Input: any format your browser can decode — MP4, MOV, AVI, MKV, WEBM, M4V and most browser-supported codecs (H.264, H.265, VP8, VP9, AV1). Output: depends on your browser. Chrome and Edge can produce MP4 (H.264) directly; Firefox and Safari fall back to WebM (VP9 or VP8). WebM is universally accepted by web embedding, YouTube, and most messaging apps.

No — never. The tool uses the browser's MediaRecorder API and Canvas to re-encode video entirely on your device. Your file is read into local browser memory only, processed locally, and the optimized result stays in your browser until you download it. There is no server-side upload or storage at any step.

YouTube's official recommended upload bitrates: 1080p 30fps → 8 Mbps · 1080p 60fps → 12 Mbps · 4K 30fps → 35–45 Mbps · 720p 30fps → 5 Mbps. The 'YouTube 1080p' preset in this tool uses 8 Mbps video + 192 kbps audio — the sweet spot for crisp uploads without ballooning the file. For 4K source content, choose Custom and increase the video bitrate to 35+ Mbps.

Three biggest levers, in order: (1) Lower the resolution — going from 4K to 1080p typically cuts the file in half with no visible quality loss on phone/tablet/laptop screens. (2) Use modern codecs like H.264 or VP9 (this tool uses both) — they're 30–50% more efficient than older formats. (3) Reduce the frame rate to 24 or 30 fps if the source is 60 fps and you're not capturing fast motion. The 'Balanced' quality mode applies all three intelligently.

The browser's MediaRecorder works at roughly playback speed — a 5-minute video takes about 5 minutes to encode. This is the trade-off for no server, no upload, and complete privacy. On modern desktops with good GPUs, encoding can run slightly faster than playback. Large files (over 200 MB) may stress the browser; for those, consider native desktop tools like HandBrake.

WebM (VP9 codec) is the fallback when your browser's MediaRecorder doesn't support MP4 output. Chrome 113+ and Edge 113+ can produce MP4 directly; Firefox and Safari produce WebM. WebM plays everywhere on the web, on YouTube, and in most messaging apps — but if you specifically need MP4 (e.g., for an old TV, an offline player, or an iPhone Photos app), use Chrome to run this tool, or convert the WebM result to MP4 with a free tool like CloudConvert.

WhatsApp accepts WebM and MP4 videos up to ~16 MB for direct send (and ~100 MB via the Document feature). The 'WhatsApp' preset in this tool targets 854×480 at 1.2 Mbps, which keeps most short clips comfortably under the 16 MB limit. For longer videos that still exceed the limit, lower the resolution to 360p or pick 'Max Compression' to shrink further.