Video & Audio Converters

Convert, compress, trim, and extract media files online

Working with Video and Audio Files

Video and audio files tend to be the largest files most people work with. A single minute of 1080p video can be over 100 MB, and an uncompressed audio recording grows at roughly 10 MB per minute. Format incompatibilities add another layer of friction: a MOV recorded on an iPhone may not play smoothly in a Windows video editor, and a WAV file that is perfect for a recording studio is far too large to attach to an email.

ConvertZen's media tools solve these problems directly in your browser. Convert between video and audio formats, compress files to meet upload limits, trim clips to the exact segment you need, or extract just the audio track from a video. No software to install, no accounts required for basic use.

All processing happens in the cloud using professional-grade encoding libraries. Your files are encrypted during transfer and automatically deleted within one hour of conversion.

Video Tools

MP4 to MP3

Extract the audio track from any MP4 video and save it as a high-quality MP3 file.

MP4 to MOV

Convert MP4 videos to Apple's MOV format for editing in Final Cut Pro, iMovie, and other Mac tools.

Compress Video

Reduce video file size by up to 80% while keeping watchable quality for sharing and uploads.

Trim Video

Cut a video to a specific start and end time without re-encoding the entire file.

Extract Audio

Pull the audio track from any video file and save it in your preferred audio format.

Audio Tools

MP3 to WAV

Convert MP3 audio to uncompressed WAV format for professional editing and production.

WAV to MP3

Convert large WAV recordings to compact MP3 files for sharing, streaming, and storage.

Choosing the Right Tool

Want just the audio from a video? Use MP4 to MP3 for a quick MP3 output, or Extract Audio if you need more control over the output format. This is ideal for saving music from videos, creating podcast clips, or getting audio for transcription.

Video too large to share or upload? Use Compress Video. Most videos can be reduced by 50-80% while staying visually watchable. This is the fastest way to get under email, social media, or messaging app size limits.

Need only part of a video? Use Trim Video. Set a start and end time to cut out exactly the segment you want, without downloading or installing video editing software.

Editing on a Mac and need MOV? Use MP4 to MOV. Final Cut Pro, iMovie, and other Apple-native editors work best with QuickTime MOV files.

Need to edit audio professionally? Use MP3 to WAV. Audio editors like Audacity and Logic Pro work best with uncompressed WAV. Convert to WAV before editing to avoid compounding compression artifacts.

Sharing a recording or podcast? Use WAV to MP3. MP3 files are about 10x smaller than WAV while maintaining good quality, making them practical for streaming, downloads, and email.

Format Overview

Video Formats

MP4 — The universal standard. Plays on virtually every device, browser, and platform. Uses H.264 or H.265 codecs for efficient compression. Best choice for sharing, uploading, and general use.

MOV — Apple's QuickTime format. Preferred by Mac-based video editors and often the native format for iPhone recordings. Excellent quality, but less compatible with Windows and web platforms.

Audio Formats

MP3 — The most widely supported audio format. Uses lossy compression to produce small files (1-5 MB per minute). Ideal for music, podcasts, and any audio meant for sharing or streaming.

WAV — Uncompressed audio with perfect quality. Files are large (10-15 MB per minute), but there is zero quality loss. The standard for professional recording, editing, and archiving.

Tips for Better Media Conversions

→Compress before sharing, not before editing. If you plan to edit a video later, keep the full-quality original. Only compress the final version you intend to distribute.
→Converting MP3 to WAV does not improve audio quality. The detail lost during MP3 compression cannot be recovered. However, converting to WAV is still useful when your audio editor requires an uncompressed input format.
→Use 256-320 kbps for music, 128 kbps for speech. Spoken content like podcasts and interviews does not benefit from high bitrates. Saving bandwidth on speech lets you allocate quality where it matters.
→Trim first, then compress. Cutting unnecessary footage before compressing produces a smaller final file and faster processing, since the compressor has less data to work through.
→Check audio sync after video conversion. Occasionally, converting between video formats can introduce slight audio drift. Play back the converted file to verify audio and video remain aligned.

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