Video
Video tools that never upload your footage
Convert a clip to MP4, cut the dead air off the front, squeeze a recording under an email limit, or pull the audio out of it. Video files are the ones you least want to hand over, and these never ask you to.
9 ready now
Video tools
Convert, cut, caption and shrink footage. Every one runs on your own device.
- Video Converter MP4, MOV, MKV, WebM, AVI and a dozen older formats, any direction.
- Compress Video Squeeze a clip under Gmail, WhatsApp or Discord’s exact limit.
- Video to GIF Turn a few seconds of video into a GIF that plays everywhere.
- GIF to Video Swap a heavy GIF for an MP4 a tenth of the size.
- Extract Audio Save the soundtrack of a video as MP3, WAV, M4A and more.
- Trim Video Cut the start and end off a clip without re-encoding it.
- Mute Video Remove the sound from a video and keep the picture untouched.
- Resize Video Change a video’s resolution or fit it to a vertical or square frame.
- Video to Images Export frames as JPG or PNG, one a second or every single one.
- Unpack a Video Soon Pull out the audio, subtitle tracks and a poster frame as separate files.
- Repair a Broken Video Soon Rebuild a recording that stopped badly and now won’t open.
- Tidy a Screen Recording Soon Cut the dead air, speed it up and crop off the browser bar.
- Burn In Subtitles Soon Put captions into the picture so no player can hide them.
- Extract Subtitles Soon Save the subtitle tracks inside a video as SRT or VTT files.
- Subtitle Converter & Resync Soon Convert SRT, VTT and ASS, and fix captions that drift out of time.
- Watermark a Video Soon Put your name or logo in the corner of a clip.
- Video Contact Sheet Soon One image of the whole video as a grid of timestamped frames.
- Restore Old Video Soon Fix the combing, grain and shake in footage from tape and old cameras.
- Crop Video Soon Crop to vertical, square or any area you drag out.
- Split a Video Soon Cut a long recording into equal parts or parts under a size.
- Replace the Audio Soon Swap a video’s soundtrack for a different audio file.
- Reverse Video Soon Play a clip backwards, with or without its sound.
- Boomerang Soon Forwards then backwards on a loop, with no visible join.
- Generate Subtitles Soon Write subtitles from the speech in a recording, on your own machine.
- Join Videos Soon Put clips end to end in one file, in the order you choose.
- Change Speed Soon Speed a clip up or slow it down, picture and sound together.
17 more are being built. They are listed here without a link until they actually work.
What these tools are for
Video is where “upload it to a website” hurts most. A two-minute screen recording is a few hundred megabytes, so you wait twice — once to send it and once to get it back — and in between a copy of your meeting, your kid’s birthday or your unreleased work sits on a machine you do not control.
Your browser can already decode and encode video with the hardware in your device, which is how video calls and streaming work. These tools use that first, through WebCodecs, and fall back to FFmpeg compiled to WebAssembly for the older formats browsers do not handle natively. That fallback is a one-time 31 MB download, after which it works with no connection at all.
Hardware encoding is fast — often faster than the upload would have been — but it is your hardware. A long 4K clip on an old laptop will take its time, and the tool tells you what it is doing rather than pretending it is instant.
The conversions people ask for most
Each one opens the converter already set to that format, with a note on what the change keeps and what it costs.
See all 211 video conversionsVideo formats we read and write
What each format is for, where it opens, and the mistake people usually make with it.
Which format should you use?
- MP4 vs MOV MP4 and MOV usually contain exactly the same video, so quality isn’t the difference.
- MP4 vs MKV MKV can hold almost anything, including several audio languages and subtitle tracks, which makes it ideal for a media library.
- MP4 vs WEBM WebM is the open format made for the web, and VP9 or AV1 inside it can be smaller than H.264 in MP4.
- AVI vs MP4 AVI is a 1990s container that usually holds older, less efficient codecs, so the same video is often much larger and won’t play on phones or in browsers.
Questions
How big a video can I convert?
There is no limit we impose. The ceiling is your device’s memory and patience: multi-gigabyte files work on a desktop, while a phone is happier with clips of a few hundred megabytes. See what the limits really are.
Is the video uploaded anywhere?
No. The clip is read by the page and processed by your browser; nothing is sent. You can confirm it by opening the network panel and watching it stay silent — here is how.
Why does a video tool sometimes download 31 MB first?
Browsers can only encode a few formats natively. For everything else the page loads FFmpeg compiled to WebAssembly — a one-time download that is then cached, so later conversions work offline.
Will converting a video lose quality?
Any re-encode loses a little, which is why trimming and muting copy the picture untouched where the container allows it. When a real conversion is needed, each conversion page says what that particular change costs.