AAC to FLAC
Convert AAC to FLAC online with Convertig.com. Free, fast, and secure audio converter—no software required. Upload your file and get lossless FLAC output.
100 MB maximum file size and upto 5 files.
300+ formats supported
Convert between more than 300 different file formats across audio, video, images, documents, ebooks and archives — all in one place.
Lightning fast
Just drop your files, choose an output format and click "Convert". Powerful servers handle the rest in seconds.
Private & secure
Your files are transferred securely and deleted automatically after processing. Your privacy is always 100% protected.
Works everywhere
Convertig is fully browser-based and works on every platform — no apps to download, install or update.
Complete Guide to AAC to FLAC
Online file conversion makes it fast and easy to transform your files between hundreds of formats without installing any desktop software. Our converter handles the entire process in your browser — just upload your files, choose the target format, and download the converted result in seconds. We support all major file categories including images, videos, audio files, documents, ebooks, archives, and more, giving you one reliable tool for every conversion task you encounter.
Modern file conversion needs to be fast, reliable, and privacy-respecting. Our system processes your files on secure servers, applies industry-standard conversion algorithms to preserve quality and content, and automatically deletes all uploaded files after processing. You never need to create an account, and every conversion is completely free — no hidden limits, no subscriptions, no watermarks on output files, and no strings attached at any point in the process.
Whether you're a professional working with specialized formats or a casual user who just needs to open a file on a different device, this converter makes the process effortless. Select files from your computer, import from Dropbox or Google Drive, or paste a direct URL — our system downloads and converts automatically. Batch processing lets you convert up to 20 files at once, saving significant time when working with large file collections or preparing content for distribution across multiple platforms.
All conversions are handled with full attention to quality and accuracy. Output files preserve the essential content, structure, and fidelity of the originals to the maximum extent the target format allows. Your files are protected by encrypted transfer and automatically deleted after your session — complete privacy, every time.
How to Convert Files in 3 Easy Steps
Upload Your Files
Click Choose Files or drag and drop files into the upload zone. You can also import directly from Dropbox, Google Drive, or paste a remote URL link.
Choose Output Format
Select your desired target format from the conversion panel. Open the advanced options to fine-tune quality, resolution, bitrate, or other format-specific settings.
Download Your Result
Once complete, click Download for each converted file. Grab them individually or batch-download all at once. Results stay available for up to 24 hours.
AAC to FLAC FAQs
No, it will not. The FLAC format is lossless, but it cannot magically restore audio data that was already discarded when the compressed AAC file was created. Your new FLAC file will be a perfect, high-quality copy of your source AAC, including any and all of its existing audio imperfections.
The main practical reason is to create a stable, lossless master file for professional audio editing or long-term archiving. By converting your AAC to FLAC, you prevent any further quality degradation that might occur from repeated saves or edits. It's a way of preserving your audio at its current quality level in a robust, archival format.
The file size increases substantially because AAC uses lossy compression, which discards audio information to achieve very small files. FLAC uses lossless compression, which works like a ZIP file for audio, perfectly preserving every bit of sound data. This perfect preservation of the audio waveform requires a much larger file size.
No, that's impossible. The FLAC file will be a perfect audible replica of the source AAC file. It will sound exactly the same to the human ear, with no improvements and no degradation introduced by the conversion process. If your source AAC has any flaws, the FLAC will have those exact same flaws.
Yes, for archiving, FLAC is often considered a superior choice. Both FLAC and WAV will store your audio with identical, perfect quality, but a FLAC file is typically 40-60% smaller than a WAV file thanks to its efficient lossless compression. This saves a significant amount of storage space without sacrificing any audio fidelity.