Free Online Audio Metadata Editor View and analyze audio file metadata including duration, format, and properties.

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Audio Metadata Editor

View and analyze audio file metadata including duration, format, and properties.

Upload Audio

Drop your audio file or click to browse.

View Info

See detailed metadata including format, duration, sample rate, and channels.

Check Specifications

Compare sample rate, bit depth, and bitrate against your target format requirements.

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What Is Audio Metadata Editor?

The Audio Metadata Editor displays detailed technical information about audio files. Upload any audio file to instantly see its duration, sample rate, channel count, estimated bitrate, file size, and format details. The tool uses the Web Audio API to decode and analyze the audio, extracting properties from the AudioBuffer and file headers. Essential for audio engineers, producers, and content creators who need to verify audio specifications. All analysis happens locally in your browser.

Why Use Audio Metadata Editor?

Instant display of all key audio properties
Supports all browser-decodable audio formats
Shows duration, sample rate, channels, bitrate, and file size
Completely private — no uploads needed

Common Use Cases

Quality Check

Verify audio specs before publishing or distributing.

Format Verification

Confirm that audio files meet required specifications.

Troubleshooting

Diagnose audio issues by examining file properties.

Cataloging

Gather technical details for organizing and cataloging audio collections.

Technical Guide

The tool reads the audio file and extracts metadata from multiple sources. The File API provides: file name, size, MIME type, and last modified date. The Web Audio API's AudioContext.decodeAudioData() provides: sample rate, number of channels, duration, and sample count (length). The estimated bitrate is calculated as: fileSizeInBits / durationInSeconds. For WAV files, the RIFF header is parsed to extract the exact bit depth, compression type, and data chunk size. The tool also computes derived statistics like total samples, samples per channel, and audio data size vs. container overhead. Results are displayed in a formatted table. The waveform preview provides a visual representation of the audio content.

Tips & Best Practices

1
Check sample rate and bit depth when troubleshooting playback issues
2
Compare file size to expected size to detect potential encoding problems
3
Mono files should have 1 channel, stereo should have 2
4
Use this tool to verify specs before submitting audio to platforms with specific requirements

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Frequently Asked Questions

Q What metadata can I see?

File name, size, format/MIME type, duration, sample rate, channel count, estimated bitrate, and bit depth (for WAV files).

Q Can I edit ID3 tags?

This tool focuses on technical audio properties. ID3 tag editing (artist, album, etc.) requires format-specific parsing not available in standard browser APIs.

Q What formats are supported?

Any audio format your browser can decode — MP3, WAV, OGG, AAC, FLAC, M4A, and WebM.

Q How is bitrate calculated?

Bitrate is estimated by dividing the file size in bits by the duration in seconds. For VBR files, this gives the average bitrate.

Q Is my file uploaded?

No. All analysis happens in your browser. Your files never leave your device.

About This Tool

Audio Metadata Editor is a free online tool by FreeToolkit.ai. All processing happens directly in your browser — your data never leaves your device. No registration or installation required.