Will the video quality drop?

A small amount — but at the "medium" or "high" preset most people can't tell the difference. For the smallest file size try the "low" preset or drop the resolution.

Which output format is best?

MP4 with H.264 is the safe-everywhere default. WebM (VP9) or MP4 (H.265) are smaller, but H.265 requires a modern player.

Can I keep the original audio?

Yes — set the audio bitrate to "match source" or pick the same audio codec. The audio is typically a small part of total file size.

Is there a file-size limit?

Yes, large uploads may be rejected to keep the free service stable. For very large files, lower the resolution before uploading.

Compress Video Online Without Ruining Quality

Shrink MP4, WebM, MOV, MKV, and AVI files for the web, email, social, and cloud uploads.

A 30-second clip from a modern phone or screen recorder can easily be hundreds of megabytes. Media Manipulator re-encodes your video at a lower bitrate or with a more efficient codec so the file shrinks dramatically while still looking good. Most users get 50–80% smaller files with no visible quality loss.

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How to use it

Upload video
Drop in any MP4, WebM, MOV, MKV, AVI, or other supported video.
Analyze codec/bitrate
We detect the source codec and recommend a target.
Apply compression
FFmpeg re-encodes at a lower bitrate or smarter codec.
Download smaller video
Save a leaner file ready for the web or sharing.

What this tool does

Re-encodes video at a lower bitrate or with a more efficient codec.
Supports MP4, WebM, MOV, MKV, AVI, FLV, WMV, and ProRes inputs.
Lets you change resolution, frame rate, and audio bitrate for further savings.
Outputs to MP4 (H.264 / H.265), WebM (VP9), or any other supported container.

Why it matters

Page-load time directly affects bounce rate, SEO ranking, and conversions.
Most email and chat platforms reject files over a few hundred MB.
Hosting costs scale with bandwidth — smaller videos save real money at scale.

Common use cases

Faster websites

Shrink hero or background videos so pages load in under 3 seconds.

Email and Slack

Get under file-size limits without uploading to a separate share host.

Social media

Pre-compress so uploads finish faster on mobile data.

Cloud storage

Cut storage bills by archiving compressed versions of large originals.

Advanced details

Under the hood the tool runs FFmpeg with libx264, libx265, or libvpx-vp9 depending on the target container.
For modern browsers, H.265 in MP4 (HEVC) or VP9 in WebM typically gives 25–50% smaller files than H.264 at equivalent quality.
When dropping resolution from 4K to 1080p, file size usually drops 4× — even before re-encoding.
The "medium" quality preset roughly matches a 23 CRF for x264, a sensible visually-lossless default.

Why Media Manipulator

Runs on our own GPU and CPU servers — no third-party processing.
Full control over codec, bitrate, resolution, and audio settings.
Free, no watermarks, no signup, no monthly limit on a casual use level.

Privacy & file handling

Your uploads are processed on our own servers and are designed to be automatically deleted within 24 hours. We do not share your files with third-party AI providers, and AI features run on a local GPU server we operate. No login or account is required.

Frequently asked questions

Will the video quality drop?
A small amount — but at the "medium" or "high" preset most people can't tell the difference. For the smallest file size try the "low" preset or drop the resolution.
Which output format is best?
MP4 with H.264 is the safe-everywhere default. WebM (VP9) or MP4 (H.265) are smaller, but H.265 requires a modern player.
Can I keep the original audio?
Yes — set the audio bitrate to "match source" or pick the same audio codec. The audio is typically a small part of total file size.
Is there a file-size limit?
Yes, large uploads may be rejected to keep the free service stable. For very large files, lower the resolution before uploading.