Free Video Converter Online

Convert between all popular video formats online. MP4, MOV, MKV, AVI, WebM, WMV, FLV, GIF and more. Extract audio from video. No signup, no software to install.

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Supports M4A, WAV, FLAC, OGG, AAC, WMA, AIFF, OPUS • Max 100 MB

Convert to MP4

16 converters — video, animation, and legacy formats to universally compatible MP4

Apple
MOV to MP4

Convert Apple QuickTime MOV videos to universally compatible MP4. Essential for sharing iPhone and Mac videos with non-Apple users.

 Video
MKV to MP4

Convert Matroska MKV files to MP4 for universal playback. Preserves video quality with optional lossless remuxing.

 Legacy
AVI to MP4

Convert legacy AVI videos to modern MP4. Reduce file size by 50–80% while maintaining quality with H.264 encoding.

 Web
WebM to MP4

Convert Google WebM videos to MP4 for broader device support. WebM works in browsers but MP4 plays everywhere.

 Windows
WMV to MP4

Convert Windows Media Video to MP4 for cross-platform compatibility. Play on Mac, Linux, iOS, Android, and web browsers.

 Animation
GIF to MP4

Convert animated GIFs to MP4 video. Reduce file size by 90%+ with better quality and smoother playback.
FLV to MP4 → Flash MPG to MP4 → MPEG 3GP to MP4 → Mobile TS to MP4 → Broadcast M4V to MP4 → iTunes MTS to MP4 → Camcorder VOB to MP4 → DVD SWF to MP4 → Flash HEVC to MP4 → H.265

Convert from MP4

Convert MP4 files to other video and audio formats

Video Formats

Apple
MP4 to MOV

Convert MP4 to Apple QuickTime MOV for Final Cut Pro, iMovie, and other Apple video editing workflows.

 Web
MP4 to WebM

Convert to open-source WebM format for royalty-free web video. VP9 offers 30–50% smaller files than H.264.

 Animation
MP4 to GIF

Create animated GIFs from video clips. Perfect for memes, reactions, tutorials, and social media posts.
MP4 to AVI → Legacy MP4 to MKV → Matroska MP4 to WMV → Windows

Audio Extraction

Popular
MP4 to MP3

Extract audio from video as MP3. Save music, podcasts, lectures, and interviews as portable audio files.

 Lossless
MP4 to WAV

Extract uncompressed audio from video for editing, sampling, or audio production workflows.

 Open
MP4 to OGG

Extract audio as OGG Vorbis format. Open-source and royalty-free, great for game audio and Linux apps.
MP4 to M4A → Apple Audio

Other Video Conversions

Cross-format conversions, audio extraction, and animation

Video to Video

Video
MKV to MOV

Convert Matroska MKV to Apple QuickTime MOV for editing in Final Cut Pro and other Apple software.

Video to GIF

Animation
MOV to GIF

Turn Apple QuickTime video clips into animated GIFs. Create reaction GIFs, memes, and short loops from iPhone footage.

 Animation
WebM to GIF

Convert WebM video clips to animated GIF format. Great for turning web video snippets into shareable GIFs.

 Animation
AVI to GIF

Convert AVI video files to animated GIFs. Extract short sequences from legacy video recordings as looping GIFs.

Video to Audio

Audio
MOV to MP3

Extract audio from Apple QuickTime videos as MP3. Save voice memos, interviews, and iPhone recordings as audio files.

 Audio
MKV to MP3

Extract audio tracks from MKV video files as MP3. Perfect for saving music, soundtracks, and audio from media files.

 Audio
WebM to MP3

Extract audio from WebM videos as MP3. Save audio from web video downloads in a universally compatible format.
MOV to WAV → Lossless MKV to WAV → Lossless MPEG to MP3 → Audio

Video Tools

Edit, compress, and process your videos online — no software to install

Tool
Compress Video

Reduce video file size while maintaining quality. Choose target size or quality level for optimal compression.

 Tool
Trim Video

Cut and trim video clips to the exact length you need. Set start and end points for precise trimming.

 Tool
Resize Video

Change video resolution and dimensions. Scale down 4K to 1080p, resize for social media, or set custom dimensions.

 Tool
Extract Audio

Extract audio tracks from any video file. Save as MP3, WAV, AAC, or other audio formats with quality control.

 Tool
Remove Audio

Strip audio tracks from video files to create silent videos. Keep the video, remove unwanted sound.

 Tool
Video Speed Changer

Speed up or slow down videos. Create time-lapses, slow motion effects, or adjust playback speed from 0.25x to 4x.

Video Formats Explained

Not all video formats are created equal. Each container format has different capabilities, codec support, and platform compatibility. Here is a detailed comparison of the most popular video formats:

Format Container Typical Codecs Streaming Subtitles File Size Best For
MP4 MPEG-4 Part 14 H.264, H.265, AAC Yes Limited Small Universal playback, streaming, social media. Plays on every device and browser. The default standard.
MOV QuickTime H.264, H.265, ProRes Yes Limited Medium Apple ecosystem. Default for iPhone, Final Cut Pro, iMovie. ProRes for professional editing workflows.
MKV Matroska Any codec Limited Multiple Varies Media archival, multiple audio/subtitle tracks. Best for movies with multi-language support.
AVI AVI DivX, Xvid, MJPEG No No Large Legacy format. Large files, poor streaming support. Common in older cameras and software.
WebM WebM (Matroska) VP8, VP9, AV1 Yes Limited Small Web-optimized, royalty-free. Used by YouTube. Great browser support, limited on hardware players.
WMV ASF WMV7/8/9, VC-1 Yes No Medium Legacy Windows format. Windows Media Player only. Not supported on Mac or Linux natively.

Bottom line: MP4 is the universal video format — every device, browser, and platform supports it. Use MKV for archiving with multiple audio/subtitle tracks. Use WebM for royalty-free web video. Use MOV for Apple editing workflows.

How Video Conversion Works

Video conversion involves changing either the container format, the codec, or both. Understanding the difference is key to choosing the right settings:

Container vs. Codec

A container (MP4, MKV, MOV, AVI) is the wrapper that holds video, audio, subtitles, and metadata together. Think of it as a box. A codec (H.264, H.265, VP9, AV1) is the compression algorithm that encodes the actual video and audio data. The codec determines quality and file size; the container determines compatibility and features.

Remuxing vs. Re-encoding

  • Remuxing — changes only the container without touching the video/audio streams. For example, MKV to MP4 remuxing is nearly instant, lossless, and produces an identical-quality file. This works when the source codec (e.g., H.264) is compatible with the target container.
  • Re-encoding (transcoding) — decodes the video stream and re-encodes it with a different codec or settings. For example, AVI (DivX) to MP4 (H.264) requires full re-encoding. This takes longer and introduces a small quality loss, but enables modern compression and compatibility.

How Convertio Handles Conversion

  • Upload your file — drag and drop or click to browse. We accept all major video formats up to 100 MB.
  • Choose output settings — select your target format. Optionally adjust codec, resolution, and quality. Our defaults work well for most use cases.
  • Download your file — conversion takes seconds to minutes depending on file size and whether re-encoding is needed. Files are auto-deleted from our servers within 2 hours.

Video Codec Comparison

The codec you choose determines the trade-off between quality, file size, compatibility, and encoding speed. Here are the four most important video codecs:

Codec File Size Quality Speed Support Best For
H.264 (AVC) Baseline Excellent Fast Universal Maximum compatibility. Plays on every device, browser, and platform. The safe choice for any use case.
H.265 (HEVC) 30–50% smaller Excellent Slower Good Smaller files at same quality. Supported by iPhones, modern Android, VLC. Limited browser support.
VP9 30–50% smaller Excellent Slow Web-focused WebM container. YouTube default. Good browser support but limited on hardware decoders. Royalty-free.
AV1 40–50% smaller Best Very slow Growing Future-proof, royalty-free. Chrome, Firefox, YouTube support. Best compression but very slow to encode.

Recommendation: Use H.264 when you need files to play everywhere. Use H.265 when file size matters and you control the playback device (local storage, iOS, VLC). For web-only distribution, consider VP9 (WebM) or AV1 for the best compression.

Platform Compatibility Guide

Which video format works on which platform? This table shows native support — no third-party software or codecs needed:

Platform MP4 MOV MKV AVI WebM WMV Best Choice
Windows Yes Partial Via VLC Yes Via browser Yes MP4
macOS Yes Yes Via VLC Via VLC Via browser No MP4 / MOV
Linux Yes Via VLC Yes Via VLC Yes Via VLC MP4 / WebM
iOS / iPhone Yes Yes Via app No No No MP4
Android Yes Partial Via app Partial Yes No MP4
Web browsers Yes Safari only No No Yes No MP4 / WebM
Smart TVs Yes Partial Partial Partial Partial No MP4
Social media Yes Yes No No No No MP4

Key takeaway: MP4 (with H.264) is the only format with truly universal support across all platforms, devices, browsers, and social media. When in doubt, convert to MP4.

Common Use Cases

Social Media

Convert videos to MP4 for Instagram, TikTok, Twitter/X, and YouTube. MP4 H.264 is the required format for all major platforms.

Device Compatibility

Make videos play on any device. Convert MKV, MOV, or WMV to MP4 for TVs, phones, tablets, and game consoles.

Video Editing

Convert source footage to editor-friendly formats. MP4 H.264 for Premiere Pro, MOV ProRes for Final Cut Pro, MKV for DaVinci Resolve.

Streaming & Web

Prepare videos for web embedding and streaming. MP4 or WebM for HTML5 video. Optimize bitrate for fast loading.

Audio Extraction

Extract audio tracks from any video format as MP3, WAV, or OGG. Save music, lectures, podcasts, and voiceovers.

File Size Reduction

Shrink large video files with modern codecs. Convert AVI to MP4 for 50–80% savings. Use H.265 for another 30–50% reduction.

Which Converter Do I Need?

Not sure which tool fits your use case? Here is a quick guide based on what you are starting with:

I have… Use When to use
iPhone / Mac videos MOV to MP4 Apple devices record in MOV format. Convert to MP4 for sharing on Windows, Android, and web platforms.
Downloaded movies MKV to MP4 MKV files from media servers or rips. MP4 plays on smart TVs, Chromecast, and mobile without extra software.
Old AVI files AVI to MP4 Legacy AVI recordings from older cameras and software. MP4 is 50–80% smaller with H.264 compression.
Windows Media files WMV to MP4 WMV files from Windows Movie Maker or screen recorders. Convert for Mac, mobile, and cross-platform use.
Web videos (WebM) WebM to MP4 WebM videos downloaded from web pages. Convert to MP4 for editing, sharing, or playback on all devices.
Animated GIFs GIF to MP4 Large animated GIFs slowing down your site. MP4 is 90% smaller with smoother playback and autoplay support.
Video → GIF MP4 to GIF Create animated GIFs from video clips for memes, reactions, tutorials, and social media posts.
Video → audio MP4 to MP3 Extract music, podcasts, lectures, or interviews from video. Keep the audio, discard the video track.
DVD / Camcorder VOB to MP4 VOB files from DVD rips or MTS from camcorders. Modernize legacy footage for easy playback and storage.
Apple editing MP4 to MOV Editing in Final Cut Pro or iMovie. Convert to MOV for the best Apple editing workflow compatibility.

Video Conversion Guides

In-depth articles on video conversion, codecs, quality settings, and video processing

MOV to MP4 — 12 guides

How to Convert

Step-by-step MOV to MP4 conversion for every platform: online, Mac, Windows, iPhone, Android. Free methods explained.
MOV vs MP4

MOV vs MP4 compared: compatibility, quality, file size, editing, and when to convert. Both are MPEG-4 containers.
Why Convert MOV to MP4

Why iPhone MOV files don't play everywhere and when you need MP4. Remuxing vs re-encoding explained.
Play MOV on Windows

MOV not playing on Windows? Install VLC, add HEVC codec, or convert to MP4. Fix the iPhone video problem.
See all 12 MOV to MP4 guides →

MKV to MP4 — 10 guides

MKV vs MP4

MKV vs MP4 compared: codec support, subtitle tracks, device compatibility, and when to use each container format.
H.264 vs H.265

H.264 vs H.265 codec comparison: quality, file size, encoding speed, hardware support, and compatibility.
Without Losing Quality

Convert MKV to MP4 losslessly via remuxing or with minimal quality loss. CRF settings and codec compatibility explained.
Container vs Codec

Understand the difference between video containers (MKV, MP4, AVI) and codecs (H.264, H.265, VP9). Essential knowledge for video conversion.
See all 10 MKV to MP4 guides →

AVI to MP4 — 2 guides

Why Convert AVI

Why AVI is outdated and how MP4 solves its compatibility, streaming, and file size problems.
Legacy Formats Guide

Understanding legacy video formats: AVI, WMV, FLV, MPEG. Why they exist, why they're obsolete, and how to convert them.

MP4 to GIF — 11 guides

How to Convert

Convert MP4, MOV, WebM to GIF online free. Five methods: online converter, FFmpeg, Photoshop, mobile apps, screen recording.
GIF vs MP4

GIF vs MP4 compared: file size, quality, browser support, email, Core Web Vitals. When to use each format.
Quality Settings

Master GIF settings: FPS, resolution, color palette, dithering. Create high-quality GIFs with optimal file sizes.
Reduce GIF Size

Shrink GIF files by 50-90%. Resolution, FPS, colors, dithering, and when to switch to MP4 or WebP.
See all 11 MP4 to GIF guides →

MP4 to WebM — 5 guides

What Is WebM

WebM format explained: VP8, VP9, AV1 codecs, Opus audio, browser support, advantages, and limitations.
WebM vs MP4

WebM vs MP4 compared: VP9 vs H.264, file size, quality, browser support, licensing. When to use each format.
VP9 vs H.264

VP9 vs H.264 codec comparison: 30-50% smaller files, encoding speed, CRF equivalence, and hardware support.
WebM for Web

WebM delivers 30-50% smaller video for websites. HTML5 fallback pattern, Core Web Vitals impact, VP9 settings.
See all 5 MP4 to WebM guides →

MP4 to MP3 — 1 guide

Extract Audio Guide

Extract audio from MP4, MKV, AVI, MOV videos. Demux vs transcode, bitrate selection, and batch processing.

GIF to MP4 — 1 guide

Why Convert

GIF to MP4 conversion reduces file size by 90%+ with better quality. Web performance, Core Web Vitals, and HTML5 video.

Frequently Asked Questions

MP4 with H.264 video and AAC audio is the most universally compatible video format. It plays natively on every operating system (Windows, macOS, Linux, iOS, Android), every web browser, every smart TV, and is accepted by all social media platforms. When you need a video to play everywhere, MP4 H.264 is always the right choice.
It depends on the conversion type. Remuxing (e.g., MKV to MP4 when both use H.264) simply repackages the video stream without re-encoding — this is lossless and instant. Re-encoding (e.g., AVI DivX to MP4 H.264) involves decoding and re-encoding, which introduces a small quality loss. With modern codecs at quality settings like CRF 18–23, the difference from the original is imperceptible to the human eye.
A container (MP4, MKV, MOV, AVI, WebM) is the file format that wraps video, audio, subtitles, and metadata together. A codec (H.264, H.265, VP9, AV1) is the compression algorithm that encodes the actual video data. The same codec can be stored in different containers — for example, H.264 video can live in an MP4, MKV, or MOV container. The container determines compatibility; the codec determines quality and file size.
Yes. All files are uploaded via encrypted HTTPS, processed on our servers, and automatically deleted within 2 hours. We never share, sell, or manually access your files. No account or personal data is required to use the converter.
Several approaches: Convert to a modern codec — switching from AVI/DivX to MP4/H.264 can save 50–80%. Use H.265 instead of H.264 for another 30–50% savings at the same quality. Lower the resolution — 1080p to 720p saves ~50% and is often sufficient for small screens. Reduce frame rate — 60fps to 30fps saves ~30% and is fine for non-action content. You can also use our video compressor to target a specific file size.

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