Compress videos without uploading them
Online video compressors usually upload your file, make you wait in a queue, then add a watermark or ask you to pay for longer videos. This tool compresses on your own device using hardware-accelerated H.264 encoding, so it is private and often faster than uploading would be.
How target size works
When you choose a target size, we calculate the bitrate needed to fit your video into that many megabytes (leaving room for audio and the file container), so the result lands just under the limit.
Also useful: trim the video first to make it shorter, or extract the audio as MP3.
How to use the Compress Video tool
- Choose a video (MP4, MOV, MKV or WebM).
- Pick Quality (Balanced is recommended) or a Target size in MB, such as 16 MB for WhatsApp or 25 MB for email.
- Choose a resolution; 720p is ideal for phones.
- Press Compress video and download the MP4.
Why SaralKit?
- Free forever: no "credits", no trial, no premium tier, no watermark and no daily limit.
- No account, ever: nothing to sign up for. Just open the page and use it.
- No data stored: your files and the numbers you type are processed by your own browser. We never upload, store or see them.
- Works offline: once the page has loaded, most tools keep working without internet.
- Open source: anyone can read the code on GitHub.
Frequently asked questions
How do I compress a video for WhatsApp?
Choose Target size, press the WhatsApp 16 MB preset and compress. Or pick Balanced quality at 720p, which usually shrinks phone videos by 70–90% with little visible difference.
Is there a watermark or length limit?
No watermark, no length limit and no sign-up. The only limit is your device's memory, since nothing is uploaded.
Why is it so fast?
It uses your device's hardware video encoder through WebCodecs, the same technology video-call apps use, instead of uploading to a slow server queue.
My iPhone video will not load. Why?
iPhones record HEVC (H.265). Safari and Chrome/Edge on most Windows and Mac computers can decode it; some Linux or older browsers cannot. Try Chrome, Edge or Safari.
Which resolution should I pick?
720p looks good on phones and is the sweet spot for sharing. Use 1080p for YouTube or large screens, and 480p for the smallest files.