Audio Converter — Free Online

Convert audio files between MP3, WAV, FLAC, OGG, AAC, M4A, AIFF, and OPUS. High-quality conversion, no signup required.

הקבצים שלכם נמחקים כשעה לאחר מכן

Whether you are preparing audio for a podcast, a mobile app, or a video project, format compatibility is a constant friction point. Different platforms demand different codecs: streaming services prefer AAC or OGG, audiophiles demand FLAC, and legacy hardware insists on WAV. Hunting down desktop software or risking an unknown install just to convert a single file wastes time and introduces security risk.

This browser-based audio converter handles MP3, WAV, FLAC, OGG, AAC, M4A, AIFF, and OPUS without any software installation. Drop in your file, choose the target format, and download the result in seconds. It is the fastest path from the format you have to the format you need.

How to Convert Audio Files Online

  1. 1

    Upload your audio file

    Drop any MP3, WAV, FLAC, OGG, AAC, M4A, AIFF, or OPUS file. Files up to 100 MB are supported.

  2. 2

    Choose output format

    Select the target audio format. All common formats are supported.

  3. 3

    Download your converted file

    Click Convert. Your file is processed server-side and ready to download. Files are deleted within 1 hour.

How Audio Format Conversion Works

Audio conversion is handled entirely in your browser using FFmpeg compiled to WebAssembly. When you select a target format, the tool invokes the appropriate encoder — libmp3lame for MP3, libvorbis for OGG, libopus for OPUS, or the native PCM encoder for WAV — with sensible default bitrate and sample-rate settings tuned for each format.

Because processing runs locally, your audio never leaves your device. The WebAssembly FFmpeg instance operates within a sandboxed worker thread, keeping the main UI responsive even for large files. Decoded PCM frames are piped directly into the encoder, minimising memory overhead and avoiding double-buffering artefacts that cheaper online tools often introduce.

Why Use FileCrank to Convert Audio?

  • ✓ Supports MP3, WAV, FLAC, OGG, AAC, M4A, AIFF, and OPUS input and output.
  • ✓ High-quality conversion — lossless where possible.
  • ✓ No quality loss for format-to-format conversions at equal or lower bitrate.
  • ✓ No watermarks, no signup, completely free.
  • ✓ Files are processed securely and deleted within 1 hour.

תכונות ומפרטים

גודל קובץ מקסימלי
עד 100 MB
פרטיות
הקבצים נמחקים לאחר כשעה
מחיר
חינם, ללא הרשמה
עיבוד
בשרת
קבצים נמחקים תוך שעה — אוטומטית.אין צורך בהרשמה.חינם — ללא עמלות נסתרות.

Frequently Asked Questions

Which audio formats are supported?

FileCrank supports MP3, WAV, FLAC, OGG, AAC, M4A, AIFF, and OPUS for both input and output.

Will converting reduce quality?

Converting between lossy formats (e.g. MP3 to OGG) involves re-encoding and may reduce quality slightly. Converting to a lossless format (e.g. to WAV or FLAC) preserves quality.

What is the maximum file size?

Files up to 100 MB are accepted. Most audio files are well within this limit.

Browser Converter vs Desktop Software

Desktop tools like Audacity or VLC can convert audio formats, but they require installation and manual export steps that add friction for a one-off task. Cloud services upload your file to a remote server, raising privacy concerns. This tool converts entirely in your browser — no upload, no install, no account — making it the fastest and most private option for quick format changes.

FileCrank Audio Converter converts audio files between MP3, WAV, FLAC, OGG, AAC, M4A, AIFF, and OPUS. High-quality conversion, no signup, files deleted within 1 hour.

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