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100% free · no signupNo sign-upRuns in your browser

Video Compressor

Shrink video file size right in your browser — no upload, no watermark, no queue.

Best for: Use it any time a video compressor would help: compress video, video compressor online, reduce video size, quick comparisons, or a sanity check.

Purpose: Shrink video file size right in your browser — no upload, no watermark, no queue.

Complete guide

Input

How it's calculated & sources

Method: ffmpeg (compiled to WebAssembly, served from this site — nothing loads from third parties) re-encodes your video as H.264 at your chosen quality, optionally downscaled to 720p. The video never leaves your device. The engine is ~31 MB on first use, then cached by your browser.

Free & no sign-up · runs entirely in your browser. Results are estimates for general information, not professional advice — verify important decisions with a qualified expert. Last reviewed June 2026.

Frequently asked questions

How much smaller will my video get?+

Typically 40-80% smaller, depending on the source. Phone recordings and screen captures compress best. The before/after sizes are shown honestly — some already-optimized videos barely shrink.

Which quality should I pick?+

'Balanced' (CRF 28) is right for sharing. 'Smaller' (32) for messaging apps. 'Higher' (24) when quality matters more than size.

Why is there a 200 MB limit?+

The whole file must fit in browser memory alongside the encoder. For bigger files, a desktop tool is the honest recommendation.

Is it really private?+

Yes — the encoder runs in your browser and is served from this site's own domain. No file, frame or byte is uploaded anywhere.

Continue your journey

Where people usually head next.

🎞️
Video to GIF
Turn a video clip into an animated GIF — pick the segment, entirely in your browser.
🎵
MP4 to MP3 — Extract Audio
Extract the audio from any video as an MP3 — decoded and encoded in your browser.
🔇
Mute Video — Remove Audio
Remove the audio track from a video — re-recorded silently in your browser.

Complete guide

Quick answers

Short, sourced answers to the questions people (and AI assistants) ask most.

What is Video Compressor?
Shrink video file size right in your browser — no upload, no watermark, no queue. It's a free, private video compressor you can use straight away: everything is computed locally in your browser, with nothing sent to a server.
Why does Video Compressor matter?
The result is your video compressor for the values you entered. Adjust any input to see exactly how it changes the outcome — handy for comparing options or checking your own working.
How is Video Compressor calculated?
The Video Compressor takes your inputs, applies the formula below, and shows the video compressor immediately so you can compare scenarios on the spot. Formula: ffmpeg.wasm (same-origin) → H.264 CRF re-encode (+optional 720p scale) → MP4.
When should you use the Video Compressor?
Use it any time a video compressor would help: compress video, video compressor online, reduce video size, quick comparisons, or a sanity check.

What is the Video Compressor?

Shrink video file size right in your browser — no upload, no watermark, no queue. It's a free, private video compressor you can use straight away: everything is computed locally in your browser, with nothing sent to a server.

How the Video Compressor works

The Video Compressor takes your inputs, applies the formula below, and shows the video compressor immediately so you can compare scenarios on the spot.

ffmpeg.wasm (same-origin) → H.264 CRF re-encode (+optional 720p scale) → MP4

Keywords: compress video, video compressor online, reduce video size, shrink mp4, video size reducer.

Reviewed by the Free Tools Galaxy editorial team · Updated June 2026 · Calculated privately in your browser.

Frequently asked questions

Is the Video Compressor free to use?+

Yes. Every tool on Free Tools Galaxy is 100% free, runs in your browser and requires no signup.

How accurate is the Video Compressor?+

Video Compressor uses the standard video compressor formula in double-precision arithmetic, so the same inputs always produce the same result and you can verify any figure by hand. It is an educational estimate — real-world outcomes depend on your actual rates, rules and assumptions.

Do you store my inputs?+

No. The Video Compressor runs entirely in your browser. Nothing is uploaded or saved to a server.

Can I use the Video Compressor on mobile?+

Yes — the interface is fully responsive and works on phones, tablets and desktops.

What are common mistakes to avoid?+

The most frequent mistake is mixing units. Double-check your inputs use a single, consistent unit before clicking Calculate.

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Related searches: mp4 to mp3 — extract audio, video to gif, mute video — remove audio

Smart Autopilot

AI-style routing · 100% on-device

Based on this tool, your recent activity and how others chain tools together.

Likely next step

🎞️Video to GIFTop match🎵MP4 to MP3 — Extract AudioExtract the audio from any video as an MP3 — decoded and encoded in your browser.🔇Mute Video — Remove AudioRemove the audio track from a video — re-recorded silently in your browser.

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Share & publish

Share & challenge

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Share-to-grow kit (Reddit, LinkedIn, Medium)
Reddit post
Title: I built/used this free video compressor — instant, no signup

Body: Shrink video file size right in your browser — no upload, no watermark, no queue. Try it: https://freetoolsgalaxy.com/tools/video-compressor
LinkedIn post
Video Compressor on Free Tools Galaxy — Shrink video file size right in your browser — no upload, no watermark, no queue. https://freetoolsgalaxy.com/tools/video-compressor
Medium intro
# Video Compressor — the free tool I keep coming back to

Shrink video file size right in your browser — no upload, no watermark, no queue.

Try it: https://freetoolsgalaxy.com/tools/video-compressor
Quora answer
The fastest way is to use a free in-browser video compressor: https://freetoolsgalaxy.com/tools/video-compressor. Shrink video file size right in your browser — no upload, no watermark, no queue.

Embed this tool anywhere

Free embed code for blogs, docs and dashboards. Every embed sends a backlink home — helping you and the galaxy grow together.

HTML iframe
Drop into any site — auto-resizes to its content height, theme-aware.
<iframe src="https://freetoolsgalaxy.com/tools/video-compressor?embed=1" title="Video Compressor" loading="lazy"
  style="width:100%;height:600px;border:0;border-radius:16px;background:#0b1020"
  allow="clipboard-write"></iframe>
<script>window.addEventListener("message",function(e){if(e.data&&e.data.type==="ftg-embed-height"){document.querySelectorAll("iframe").forEach(function(f){if(f.contentWindow===e.source){f.style.height=e.data.height+"px";}});}});</script>
<p><a href="https://freetoolsgalaxy.com/tools/video-compressor" target="_blank" rel="noopener">Powered by Video Compressor on Free Tools Galaxy</a></p>
Responsive wrapper
Aspect-locked container — good for blog post bodies.
<div style="position:relative;padding-bottom:75%;height:0;overflow:hidden;border-radius:16px">
  <iframe src="https://freetoolsgalaxy.com/tools/video-compressor?embed=1" title="Video Compressor" loading="lazy"
    style="position:absolute;inset:0;width:100%;height:100%;border:0" allow="clipboard-write"></iframe>
</div>
WordPress / Markdown
Paste in a custom-HTML block or markdown file.
[Video Compressor — free online tool](https://freetoolsgalaxy.com/tools/video-compressor)

<iframe src="https://freetoolsgalaxy.com/tools/video-compressor?embed=1" width="100%" height="600" frameborder="0"></iframe>
Text link-back
Minimal credit link — best for sidebars and footers.
<a href="https://freetoolsgalaxy.com/tools/video-compressor" target="_blank" rel="noopener">Try the free Video Compressor</a>

Share-to-Grow Kit

Pre-written, ready-to-paste posts for every major channel. Help others discover this tool — and earn backlinks.

Title
I built a free random number generator that works instantly in the browser — no signup, no ads in your face
Body
Hey r/[subreddit],

I kept needing a quick random number generator and most options online were slow or behind paywalls, so I built one that:

• Runs 100% in your browser (your data never leaves your device)
• No signup, no email wall, no popups
• Loads in under a second on mobile

It covers the standard random number use cases (random, number, generator, rng) and links out to the formula + worked examples if you want to learn the math.

Link: https://freetoolsgalaxy.com/tools/random-number-generator

Happy to take feedback — what's missing?
Post to a relevant subreddit (e.g. r/InternetIsBeautiful, r/webdev, r/productivity). Avoid spammy subs.
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