Is converting MP3 to AAC free?
Yes. This tool is completely free with no limits, watermarks or sign-up requirements.
Free MP3 audio converter
Convert MP3 to AAC
Convert MP3 audio to AAC for free, right in your browser. Upload a .mp3 file, pick AAC from the output menu and the converted audio appears instantly in a player you can listen to before downloading. Everything is re-encoded locally — no uploads, no accounts, no watermarks.
Checking browser support…
What is MP3 to AAC conversion?
MP3 (MP3) and AAC (AAC) are two popular audio formats, but not every player or editor reads them all. This free converter decodes your .mp3 file and re-encodes it as a valid .aac file. The whole conversion runs in your browser, so your audio stays private.
How it works
- 1Upload a .mp3 audio file.
- 2Choose AAC from the output format menu — the conversion starts automatically.
- 3Preview the converted audio in the browser player.
- 4Download the converted .aac file. No signup needed.
Why this tool
- 100% private. The conversion runs entirely in your browser. Your audio file is never uploaded to a server.
- Free, no signup. No accounts, no watermarks, no file size limits. Convert as many audio files as you like.
- 7 output formats. Pick AAC, AIFF, FLAC, M4A, MP3, WAV or WMA from the dropdown next to the preview.
Frequently asked questions
Are my audio files uploaded to a server?
No. The conversion happens entirely in your browser with FFmpeg WASM, so your MP3 file never leaves your device.
How do I convert MP3 to AAC?
Upload a .mp3 file, choose AAC from the output menu and the converted audio is previewed immediately. Click Download to save the .aac file.
What output formats can I choose?
AAC, AIFF, FLAC, M4A, MP3, WAV, WMA — the dropdown next to the preview switches between them.
More audio converters
Convert AAC to AIFFConvert AAC to FLACConvert AAC to M4AConvert AAC to MP3Convert AAC to WAVConvert AAC to WMAConvert AIFF to AACConvert AIFF to FLACConvert AIFF to M4AConvert AIFF to MP3Convert AIFF to WAVConvert AIFF to WMAConvert FLAC to AACConvert FLAC to AIFFConvert FLAC to M4AConvert FLAC to MP3Convert FLAC to WAVConvert FLAC to WMAConvert M4A to AACConvert M4A to AIFFConvert M4A to FLACConvert M4A to MP3Convert M4A to WAVConvert M4A to WMAConvert MP3 to AIFFConvert MP3 to FLACConvert MP3 to M4AConvert MP3 to WAVConvert MP3 to WMAConvert WAV to AACConvert WAV to AIFFConvert WAV to FLACConvert WAV to M4AConvert WAV to MP3Convert WAV to WMAConvert WMA to AACConvert WMA to AIFFConvert WMA to FLACConvert WMA to M4AConvert WMA to MP3Convert WMA to WAV
Need AI video subtitle translation?
VideoTranslator.org goes beyond free converters: upload a video and its speech is transcribed with AI, translated into subtitles in 30+ languages, and even dubbed with AI voices — all in one browser-based workflow.
Try AI subtitle translation — free