Video Converter Online
Convert supported videos to MP4, WebM, MKV or MOV locally. Choose quality, resolution and frame rate, with H.264 or VP9 output and no video upload.
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Your video stays on your device — processed locally in your browser, never uploaded.
Quick Facts About Video Converter Online
Convert supported videos to MP4, WebM, MKV or MOV locally. Choose quality, resolution and frame rate, with H.264 or VP9 output and no video upload.
- Input
- Supported local containers with video codecs your browser can decode
- Output containers
- MP4, WebM, MKV and MOV
- Video codec
- VP9 for WebM; H.264 for MP4, MKV and MOV
- Video processing
- Every conversion decodes and re-encodes the video
- Controls
- Four quality presets; original or 480p–2160p resolution; original, 24, 30 or 60 fps
- Audio
- Copied when compatible; otherwise converted when supported
- Privacy and limits
- No video upload; browser codec support and memory determine practical limits
MP4 vs WebM vs MKV vs MOV
A container packages video, audio and other media information; it is not itself a video codec. TakeVid provides these four output containers, with specific output video codecs rather than arbitrary codec selection. Choose a format for the destination player or workflow and test the result there. MOV output does not mean ProRes, and choosing MKV does not guarantee preservation of every source track.
| Format | Common use | TakeVid video output |
|---|---|---|
| MP4 | Broad device and browser compatibility | H.264 |
| WebM | Web delivery where the player supports WebM | VP9 |
| MKV | Workflows that accept a flexible Matroska container | H.264 |
| MOV | Apple or editing workflows that accept H.264 MOV | H.264 |
Remux vs Re-encode
Remuxing copies compatible encoded tracks into a different container without decoding and re-encoding the video. It avoids a new generation of video compression, although it cannot change the underlying codec or image detail. Re-encoding decodes frames and encodes a new stream, allowing codec, resolution, quality or frame-rate changes. The current TakeVid converter re-encodes video on every path, including when you keep the original resolution and frame rate, because a quality preset is always applied. WebM exports VP9; MP4, MKV and MOV export H.264. There is no exposed lossless or container-only video remux mode. Compatible audio may still be copied separately.
What Do Quality, Resolution and Frame Rate Change?
The four quality presets trade file size against compression detail; they are not target-MB controls. Keep Original resolution to retain source dimensions or choose a 480p, 720p, 1080p, 1440p or 2160p output height. Width is calculated from the source aspect ratio and rounded to even dimensions, with contain fitting. Upsizing adds pixels through scaling and does not create an AI restoration. Keep the original timing or select 24, 30 or 60 fps; increasing FPS does not invent newly captured motion detail. For a strict size budget, use Video Compressor after conversion.
Which Input Files Can Be Converted?
Both the file container and its video codec must be supported. MP4, QuickTime/MOV, Matroska/MKV and WebM are supported container families, but an individual file can still fail because its codec cannot decode or the chosen output cannot encode on your browser. The current media parser does not include AVI, WMV or FLV demuxers, so those files are not guaranteed inputs even if the file picker lets you select them. Unsupported tracks may be omitted by the conversion library. Preview the output, listen to the sound and test it in the destination player before deleting the original.
How to Convert a Video
- Open the video you want to convert.
- Pick the output format — MP4, WebM, MKV or MOV — and choose the quality, resolution and frame rate.
- Convert locally and download the new file.
Why Use TakeVid Video Converter
- Convert supported browser-decodable inputs to MP4, WebM, MKV or MOV
- Four quality presets, from space-saving to high fidelity
- Resolution options from 480p up to 4K, including upscaling
- Frame-rate control: keep the original, or force 60, 30 or 24 fps
- Runs locally with WebCodecs — no upload; practical limits depend on browser codec support, available memory and device performance
- No queue, no account, no watermark on the output
- Your files stay on your device the whole time
Supported Formats
Supported input container families include MP4, QuickTime/MOV, WebM and Matroska/MKV; the contained codecs must also decode in your browser. AVI, WMV and FLV are not supported parser families. Output: MP4, MKV and MOV with H.264, or WebM with VP9. Unsupported audio tracks may be omitted; check the result.
Common Use Cases
- Convert iPhone or camera MOV footage to MP4 for Windows and Android
- Turn a screen recording into WebM for smaller web uploads
- Repackage a clip for a player or device that needs a specific container
- Convert supported MOV or MKV files to H.264 MP4 for a compatible player
- Meet platform frame-rate requirements (30 or 24 fps) in one pass
- Downscale 4K footage to 1080p while converting — no second tool needed
- Get footage into the format your editor or client asks for
Privacy & Browser Processing
This tool runs entirely in your browser using WebCodecs. Your video is decoded, processed and re-encoded on your device — it is never uploaded to a server, and everything is released when you close the tab.
Related Video Tools
- Compress Video to a Target Size — Reduce video file size with a custom MB target. TakeVid selects bitrate, resolution and frame rate locally, checks the result and exports H.264 MP4 without uploads.
- Free AI Video Upscaler Online — Upscale supported videos locally with Anime4K AI on WebGPU. Choose a higher resolution, compare a preview and export H.264 MP4 without uploading your video.
- Video to MP3 Converter — Convert a supported video's audio to MP3 at 192 kbps, WAV, M4A or OGG. Process files locally in your browser, with no upload or account required.
Download Videos with TakeVid
TakeVid is a browser extension that detects supported video and streaming resources on many websites. Save compatible media in your browser, then edit the source clip with these local video tools.
Frequently Asked Questions
Which formats are supported?
Supported input containers include MP4, MOV, WebM and MKV with browser-decodable codecs. The current parser does not support AVI, WMV or FLV. Output is MP4, MKV or MOV with H.264, or WebM with VP9; video is re-encoded even with original dimensions.
Will my video be uploaded?
No. Decoding and encoding happen locally in your browser via WebCodecs.
Which output format should I choose?
MP4/H.264 suits broad playback workflows; WebM/VP9 suits compatible web players. MKV and MOV are available for applications that accept those containers with H.264. MOV does not mean ProRes, and no container guarantees every audio track is retained.