516 Codecs - 422 Formats

VoxScriber supports virtually all existing audio and video formats. Discover which format offers the best quality for your transcriptions.

Numbers

| Statistic | Count | |---|---| | Supported Codecs | 516 | | File Formats | 422 | | Audio Codecs | 280+ | | Video Codecs | 236+ |

Recommended Formats

These are the formats we offer the best support and transcription quality for:

Audio

MP3

Popular | Recommended

The most universal compressed audio format. Excellent compatibility with all devices and platforms. Good balance between quality and file size.

WAV

Recommended | Uncompressed audio

Maximum audio quality without loss. Ideal for professional recordings where transcription accuracy is critical. Larger files, but better fidelity.

M4A / AAC

Popular | Apple format

Default format for Apple devices (iPhone, iPad). Good compression with quality superior to MP3 at the same bitrate.

FLAC

Lossless audio

Compression without quality loss. Ideal for high-fidelity files. Smaller size than WAV with the same quality.

OGG / OGA

Open format

Open-source format. Common in web applications and Linux. Good quality at low bitrates.

WMA

Windows format

Microsoft proprietary format. Common in recordings made on Windows. Compatible with Windows Media Player.

Video

For video files, we automatically extract the audio track for transcription:

MP4

Popular | Recommended

The most universal video format. Compatible with virtually all devices and platforms.

MOV

Popular | Apple format

Default format for Apple cameras and devices. High audio and video quality.

AVI

Classic format

Classic Windows video format. Widely compatible, but files can be large.

MKV

Matroska format

Versatile container that supports multiple audio tracks and subtitles. Common in high-quality content.

WebM

Web format

Web-optimized format developed by Google. Common in online videos and streaming.

WMV

Windows format

Microsoft proprietary video format. Common in Windows corporate environments.

Other Supported Formats

In addition to the popular formats listed above, VoxScriber supports hundreds of other formats including:

Additional Audio

AIFF, AMR, APE, AU, CAF, DTS, GSM, OPUS, RA, SPX, TTA, VOC, WV, and many more.

Additional Video

3GP, ASF, FLV, M2TS, MTS, MPEG, MPG, OGV, RM, SWF, TS, VOB, and many more.

Professional Formats

BWF (Broadcast Wave Format), RF64, W64, CAF (Core Audio Format), and other formats used in professional audio production.

For the best transcription quality, prefer uncompressed formats (WAV, FLAC) or high-quality compressed formats (MP3 320kbps, AAC 256kbps). Heavily compressed formats may reduce transcription accuracy.

Tips for Best Quality

Recording

Use a quality microphone when possible
Record in a quiet environment
Maintain consistent distance from the microphone
Avoid overlapping voices

File Format

Prefer WAV or FLAC for maximum quality
MP3 at 128kbps or higher is adequate for most cases
Avoid heavily compressed formats (low bitrate)
For video, MP4 with AAC audio is ideal

Upload

Check the file size before uploading
Files up to 5GB are supported with AssemblyAI
For very large files, consider splitting into parts
Use a stable connection for large uploads

All Audio Formats

Click any format to see technical details, advantages and how to transcribe:

MP3 | WAV | OPUS | AMR | AIFF | ALAC | APE | AU | CAF | DTS | AC3 | GSM | MP2 | RealAudio | VOC | WavPack | QCP | Speex | G.722 | M4A | FLAC | AAC | OGG | WMA | TTA | Musepack | Shorten

All Video Formats

For video files, we automatically extract the audio track:

MP4 | MKV | MOV | AVI | WMV | FLV | WebM | TS | MPEG | VOB | RMVB | 3GP | MXF | DV | OGV | M2TS | ASF | M2V | DAT | DivX | Xvid

Ready to transcribe?

Now that you know all the supported formats, upload your file and experience the quality of our automatic transcription.

Continue learning

Detailed Format Guide - Complete analysis with pros, cons, and technical recommendations
Transcription Quality Settings - How to optimize your files for better transcription
How to Upload Files - Complete file upload guide

Audio & Video Formats for Transcription | VoxScriber Complete Guide