Audio Format Converter

📖 Tool Introduction

The all format audio converter handles common audio conversions inside the browser. No software to install and nothing to upload. Choose the audio, pick an output format, adjust sample rate, channels and bitrate as needed, and one press does the rest.

Nine output formats are supported: MP3, WAV, FLAC, AAC, M4A, OGG, Opus, AIFF and AC3. MP3 suits general distribution and car players. WAV and AIFF are uncompressed and fit editing software or masters. FLAC compresses losslessly to roughly half of WAV and restores exactly. AAC and M4A are common across Apple ecosystems and spoken word content. OGG and Opus are widespread on the web and in real time communication and do more per bit. AC3 covers surround and film audio tracks.

Sample rate offers five steps from 8k to 48k, or follows the source. Speech drops to 16k for a noticeably smaller file with almost no audible difference, while music wants 44.1k or 48k. Channels can be forced to mono or stereo; mono saves about half the size and suits speech, podcasts and audiobooks.

Bitrate spans six steps from 64k to 320k. Speech is fine at 64k, music usually sits at 128k to 192k, and 256k or 320k is there when you want the detail. Picking a lossless format such as WAV or AIFF hides the bitrate option because those formats do not use it.

Volume, fade, tempo and trimming are four independent operations. Volume runs from 0.5x to 2x. Fading adds one to five seconds of ramp at both ends, useful for ringtones and joined clips. Tempo runs from 0.5x to 2x and changes speed without changing pitch. Trimming takes a range written as 00:00:10-00:00:30, and leaving it blank processes the whole file. Everything is local and the audio never leaves your device.

✨ Key Features

• Nine output formats: MP3, WAV, FLAC, AAC, M4A, OGG, Opus, AIFF and AC3 for every situation
• Five sample rates: 8k to 48k, drop speech to 16k to save space, keep music at 44.1k or 48k
• Channel and bitrate control: force mono to save about half, with six bitrate steps from 64k to 320k
• Volume and fading: 0.5x to 2x gain, plus one to five second ramps at the start and end
• Tempo and trimming: 0.5x to 2x speed change without pitch shift, and cut any range by timecode
• Batch queue and local processing: handle several files at once with nothing uploaded

🚀 How to Use

1. Click the upload area to choose audio, or drag files in; several at once is fine
2. Pick an output format on the right; the bitrate option hides itself for lossless formats
3. Adjust sample rate, channels, bitrate, volume, fade and tempo as needed
4. To keep only part of a file, fill in trim using the form 00:00:10-00:00:30
5. Press start, wait for the progress bar, then press download in the result area below

⚠️ Things to Note

• Lossy conversion cannot be undone: Moving from FLAC to MP3 discards information permanently; converting back will not restore it
• The engine loads on first use: The engine is about 25 MB and downloads once per page on the first start, then stays cached
• Fade positions are relative to duration: The fade out counts back from the end, so very short clips may overlap; preview first
• Tempo uses a dedicated filter: Speed change goes through a filter rather than resampling, which keeps the pitch intact
• Long recordings take a while: Audio over an hour can need several minutes in a browser, so watch the progress bar