NoInstallTools

Video Converter — Free Online MP4, WebM & GIF Converter, No Upload

Convert video between MP4, WebM, MOV, AVI, MKV, GIF and extract audio — free, no upload required.

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Your computer does 100% of the processing — not a server, not the cloud.

FFmpeg — the industry-standard open-source video engine — runs directly inside your browser via WebAssembly. Your video file never leaves your device. It is not uploaded, transmitted, or processed anywhere outside your own machine.

  • ✓Files stay on your computer — zero upload, zero cloud
  • ✓Completely private — no account, no logging, no analytics on your files
  • ✓Works offline once the engine has loaded
  • ⚠Speed depends entirely on your device. Your CPU and RAM do all the work — a faster machine converts faster.
  • ⚠Very large files (1 GB+) may be slow or use significant memory.
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Drop a video file here or browse files

MP4 · WebM · MOV · AVI · MKV · WMV · FLV · M4V · and more

Recommended: under 500 MB for reasonable conversion times

Free Online Video Converter — 100% Local, No Upload, Runs on Your Computer

This converter runs FFmpeg — the industry-standard open-source video engine — compiled to WebAssembly inside your browser. Your video never leaves your device. All encoding is performed by your own CPU. This site has no servers involved in conversion at any point.

Supported output formats

MP4H.264 + AAC — the universal standard; plays on every phone, TV, browser, and platform
WebMVP9 + Opus — open format designed for web video; smaller files than MP4 at same quality
MOVH.264 — Apple QuickTime container; preferred for macOS and iOS video workflows
AVIMPEG-4 Part 2 — classic Windows container; widely compatible legacy format
MKVH.264 — Matroska container; supports multiple audio tracks, chapters, and subtitles
GIFAnimated image — first 30 seconds, 480 px wide, 10 fps; best for short clips
MP3Extracts the audio track from any video as a compressed MP3 file
WAVExtracts audio as uncompressed PCM — lossless, larger file size

Related: Video Clipper to trim a clip first, Video Compressor to reduce file size, or Video to Audio for audio-only extraction.

Frequently Asked Questions

Is the Video Converter free?

Yes — completely free. No account, no subscription, and no file size limit beyond your device memory.

Is my video uploaded to a server?

No. Conversion runs locally in your browser using FFmpeg compiled to WebAssembly. Your video never leaves your device.

Do I need an account?

No account, no login, and no signup required.

What formats are supported?

Input and output: MP4, WebM, MOV, AVI, MKV, and animated GIF. Audio extraction outputs MP3, AAC, OGG, and WAV.

Why does conversion take a while?

Video processing is CPU-intensive. Your device does all the work — not a cloud server — so speed depends on your processor. The FFmpeg engine also downloads ~32 MB on first use, then your browser caches it.

Is there a file size limit?

No server limit. Files under 500 MB convert in a reasonable time. Very large files (1 GB+) may exceed your browser's memory.

Related reading

from the blog
How to Convert HEIC Photos to JPEG or PNG Without Installing SoftwareiPhone HEIC photos won't open on Windows or most websites. Convert them to JPEG or PNG instantly in your browser — no upload, no software, no account needed.How to Compress Images Without Losing QualityCompress JPEG, PNG, and WebP images directly in your browser — no upload, no account. Here's how to reduce file size without visible quality loss.How to Compress Audio Files Without Losing QualityCompress MP3, WAV, FLAC, and other audio files without uploading them. Here's how to reduce file size without audible quality loss — free, no account needed.