Universal Video Converter

Convert Videos to Any Format

Transform videos between MP4, WebM, MKV, AVI, MOV and more. Adjust resolution, codec, and quality settings. Professional FFmpeg backend.

All major formats supported Resolution control Hardware-accelerated

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Up to 100MB free • Output Format: MP4, WEBM, MKV, AVI, MOV, WMV

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Files deleted in 2h

Fast Processing

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Blazing Fast

How to Convert

Convert any file in seconds — no software, no sign-up required.

Upload Your Video

Select any video file from your device — MP4, MKV, AVI, MOV, WebM, WMV, FLV, and more are all accepted inputs.

Choose Output Format

Select your target format from the dropdown. Choose a quality preset (high, medium, low) or set a custom CRF value for precise control.

Download Converted Video

Once encoding completes, download your converted video file. Typical conversion of a 5-minute video takes under 60 seconds.

Why EasyConv

Why Use EasyConv

Professional-grade conversion with features designed for real-world workflows.

Universal Compatibility

Convert to the right format for any device, platform, or player — from iPhone and Android to smart TVs and web browsers.

Quality & Resolution Control

Adjust output resolution (720p, 1080p, 4K), codec, and quality level (CRF) to meet your exact delivery requirements.

Multi-Threaded Encoding

Server-side FFmpeg uses multiple CPU cores for fast video transcoding — even large 4K files encode quickly.

Audio Track Preserved

Audio tracks are transcoded alongside the video, with automatic codec selection appropriate for each output format.

Aspect Ratio Maintained

Original video aspect ratio and display properties are preserved during conversion, preventing stretching or cropping artefacts.

Files Auto-Deleted

Uploaded and converted files are automatically removed from our servers within one hour. Your videos stay private.

300+ Formats

Supported Formats

Detailed breakdown of every format supported by this converter.

Format	Description	Extension	Use Case
MP4 (H.264)	Most widely supported video format	`.mp4`	Universal sharing, social media, web
WEBM (VP9)	Open format for HTML5 video	`.webm`	Web streaming, YouTube uploads, browsers
MKV (H.264/HEVC)	Flexible container for HD video	`.mkv`	Home theatre, Plex/Kodi, archiving
AVI (XVID/DIVX)	Classic Windows video container	`.avi`	Legacy player compatibility, DVD authoring
MOV (H.264)	Apple QuickTime format	`.mov`	Final Cut Pro, macOS, iPhone editing
WMV (WINDOWS MEDIA)	Windows Media Player format	`.wmv`	Windows-native sharing, legacy compatibility
FLV (FLASH VIDEO)	Legacy web video format	`.flv`	Legacy web player compatibility

3 Simple Steps

Frequently Asked Questions

Everything you need to know about this conversion tool.

MP4 with H.264 is the universal winner — it plays on every device, platform, and browser. For web-only delivery, WebM with VP9 offers better compression. For professional editing, MOV or MKV is preferred.

Yes. EasyConv supports 4K (2160p) input and output. Note that 4K encoding is more CPU-intensive and may take 2–5 minutes for longer clips.

Yes. The audio track is automatically transcoded to an appropriate codec for the target format — AAC for MP4/MOV, Vorbis for WebM/OGG, and AC3 or AAC for MKV and AVI.

CRF (Constant Rate Factor) is a quality-based encoding metric. Lower values = higher quality (and larger files). CRF 18 is near-lossless, CRF 23 is default/balanced, and CRF 28+ is lower quality for smaller file sizes.

Yes — a resolution selector is available in the options. Common options include 360p, 480p, 720p, 1080p, and original resolution. Downscaling a 1080p video to 720p significantly reduces file size.

There is no hard limit on duration, but file size must stay under 500 MB. For reference, a 60-minute MP4 at 720p is approximately 400–600 MB depending on bitrate.

12M+ users trust us

Who Uses This Tool

Real-world use cases from professionals across different industries.

Mobile Users

Phone & Tablet Playback

Convert to MP4/H.264 for guaranteed playback on every iOS and Android device without third-party apps.

Content Creators

Social Media Ready

Prepare videos for YouTube, Instagram, TikTok, and Twitter by converting to the platform's preferred format and resolution.

Home Theatre Users

Plex & Kodi Libraries

Convert downloaded files to MKV or MP4 for seamless direct-play in Plex, Kodi, and Jellyfin without server-side transcoding.

Web Developers

HTML5 Video Embedding

Convert source video to WebM (VP9) and MP4 (H.264) to provide dual-format HTML5 video with full browser coverage.

Video Editors

Editing Compatibility

Transcode footage from cameras or drones into a format your editing software handles best — MOV for Final Cut, AVI for legacy tools.

Archivists

Long-Term Preservation

Re-encode collections to H.265/HEVC inside MKV — an open, future-proof container that halves storage requirements vs H.264.

Why EasyConv

Comparison

See how we compare to other solutions

Feature	Our Tool EasyConv	HandBrake	Other Online
No installation
Browser-based conversion
FFmpeg-powered quality
Multiple output formats
Resolution control
Auto audio re-encoding
Files auto-deleted			Varies

Technical Specifications

Detailed technical information about our conversion engine.

Limits

Max file size: 500 MB (free)
Max output formats: 7
Max resolution: 4K (2160p)

FFmpeg H.264 H.265 VP9 AAC MKV WebM

Engine

FFmpeg 6.x with libx264, libx265, libvpx-vp9

Quality

CRF 18–28 (H.264 / H.265) · VP9 CRF 30–40

Speed

Multi-threaded CPU encoding · typical 5-min clip < 60 s

Security

HTTPS transfer · isolated temp dir · auto-purged in 2 h

Input formats

20+ accepted

Output formats

7 video formats

Audio codecs

AAC, Vorbis, MP3, AC3

Complete Guide

Universal Video Converter: Formats, Codecs & Quality Explained

Modern video files are a combination of a container (like MP4, MKV, or WebM) and one or more codecs (like H.264 or VP9). Knowing when to convert — and which settings to choose — makes the difference between a tiny shareable file and a bloated unusable one.

Container vs Codec: What Are You Actually Converting?

A video container is a wrapper file format that holds streams of encoded video, audio, and metadata. The codec is the algorithm used to compress those streams. When you convert a video, you may be changing the container, the codec, or both.

For example, converting MKV to MP4 with H.264 video may only require a remux (moving data between containers without re-encoding) if the source already uses H.264. This is near-instant and lossless. Converting MP4/H.264 to WebM/VP9, however, requires full re-encoding and takes longer.

H.264 vs H.265 vs VP9: Which Codec Should You Choose?

The three dominant modern video codecs each serve different use cases:

H.264 (AVC) — widest device support, fastest decoding, best choice for sharing and social media.
H.265 (HEVC) — same quality as H.264 at roughly half the file size; best for archiving and 4K. Requires newer hardware for smooth playback.
VP9 — Google's royalty-free codec used in WebM; excellent for web streaming and YouTube uploads. Similar quality to H.265.

What Is CRF and How Does It Affect File Size?

CRF (Constant Rate Factor) is a quality-based encoding control. Instead of targeting a fixed bitrate, CRF lets the encoder adjust bitrate frame-by-frame to maintain consistent visual quality throughout the video.

For H.264: CRF 18 = near-lossless, CRF 23 = balanced default, CRF 28 = heavy compression. Each step of ±6 roughly doubles or halves the file size. For most sharing purposes, CRF 23 is the ideal balance.

Format Guide: Choosing the Right Output for Your Use Case

MP4 — safest choice for any device, browser, or platform. Use H.264 for sharing, H.265 for archiving.
WebM — best for web embedding. Smaller files than MP4 at equal quality. Use VP9 codec.
MKV — most flexible container. Multi-track audio, subtitle embedding, chapter support. Best for home theatre.
MOV — Apple native format. Best for Final Cut Pro, iMovie, and macOS workflows.
AVI — legacy format. Only use when required for old software, DVD authoring, or legacy hardware.

Tips for Fast, High-Quality Video Conversion

To get the best results from EasyConv's video converter:

Use stream copy when the source codec matches the target container — this is instant and lossless.
Start with the highest-quality source available — re-encoding from an already-compressed file compounds quality loss.
For social media, target 1080p at CRF 23 — this matches platform bitrate recommendations without overshooting limits.
For 4K archiving, choose H.265/HEVC at CRF 20 — you get near-lossless quality at significantly smaller file sizes than H.264.