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Compression runs entirely in your browser. Your video never leaves your device.
Interactive tool
Compress MP4 video free in your browser
From a lighter video to a full campaign
Compress your videos here for free, then create ads and short-form videos in Adly.
Try Adly freeHow to compress a video in 4 steps
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1
Upload the video
Pick an MP4, MOV, or WebM up to 80MB and 5 minutes. The file stays on your device.
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2
Choose a compression level
Balanced for everyday sharing, higher quality for important content, or strong for the smallest file.
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3
Set resolution and audio
Downscale to 720p or 480p for bigger savings, and remove audio if you do not need it.
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4
Compress and download
Wait for local processing, compare before/after size, then download the new MP4.
Why compress video with Adly?
Quality control
Three clear compression levels balance size against clarity.
Resolution downscale
Turn 4K or 1080p into 720p or 480p for major size savings.
Optional audio removal
For silent clips, dropping the audio track saves extra space.
Before/after comparison
See original size, new size, and savings percentage with a live preview.
No signup
Start immediately with no account and no watermark.
When do you need video compression?
WhatsApp sharing
Shrink the file so it sends fast with acceptable quality in chats.
Faster social uploads
Smaller files upload and process faster on every platform.
Email attachments
Get under attachment limits by compressing before sending.
Storage savings
Archive old clips at a fraction of the size without obvious quality loss.
Quick guide to reducing video size
Video size comes down to three things: resolution, bitrate, and duration. Adly's video compressor re-encodes your file more efficiently, so you usually get large savings with no visible difference.
Start with the balanced level. If the file is still big, drop the resolution to 720p; it is enough for most mobile viewing. If the clip is silent or you will add music later, enable audio removal.
Long or high-resolution videos take longer because processing happens on your device — which is exactly what keeps it private: no uploads, no servers, no queues.
Video compression FAQ
Is it free?
Yes, completely free with no signup and no watermark.
Is my video uploaded to your servers?
No. Compression runs entirely in your browser; the file never leaves your device.
Which formats are supported?
MP4, MOV, and WebM as input. The output is always a widely compatible MP4.
What are the limits?
Up to 80MB and 5 minutes to keep in-browser processing fast.
How much smaller will my file get?
Typically 30–70% smaller depending on the source, level, and resolution you choose.
Will quality drop?
Balanced compression keeps quality very close to the original. Try the levels and compare.
Why is processing sometimes slow?
It runs on your device. Longer or higher-resolution videos need more time.
Does it work on mobile?
Yes within device limits. For large files, a desktop is smoother.
What if the file does not shrink?
Some files are already well compressed. Try a stronger level or lower resolution.
Can I convert the video to GIF?
Yes, use the free MP4 to GIF tool from Adly.
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From a lighter video to a full campaign
Compress your videos here for free, then create ads and short-form videos in Adly.
Try Adly free