Convert MP4 to FLAC Online
MP4 is a digital multimedia container that stores video, audio, subtitles, and metadata. FLAC compresses audio without any loss of quality, typically reducing file size by 40–60%. AnyConvert converts MP4 to FLAC securely without installing desktop software.
MP4 to FLAC Converter
Convert your MP4 files to FLAC format quickly and easily. Upload your file and download the result.
Max file size: 50MB
Why convert MP4 to FLAC?
Switching from MP4 helps you avoid encoding high-quality h.265/av1 inside mp4 may face patent/licensing concerns. FLAC excels at lossless compression that preserves original master quality, making it a better fit when clients or platforms expect archiving cd collections and high-resolution downloads.
Free Lossless Audio Codec also offers supports metadata, album art, and cue sheets. That means your converted files stay useful for archiving cd collections and high-resolution downloads and audiophile music libraries and media servers.
MP4 strengths
- Excellent compatibility with browsers, TVs, mobile devices, and OTT platforms
- Supports multiple audio tracks, subtitles, and chapter markers
- Efficient streaming via fragmented MP4 and adaptive bitrate protocols
FLAC advantages
- Lossless compression that preserves original master quality
- Supports metadata, album art, and cue sheets
- Fast decoding makes it suitable for streaming and playback
Key differences
| Feature | MP4 | FLAC |
|---|---|---|
| Compression | Lossy | Lossless |
| Transparency / Alpha | Not applicable | Not applicable |
| Typical file size | Compact (lossy compression) | Moderate (lossless compression) |
| Best suited for | Web video delivery and social media uploads and Mobile playback and offline downloads | Archiving CD collections and high-resolution downloads and Audiophile music libraries and media servers |
| Standard | Open, royalty-free specification | Open, royalty-free specification |
Before you convert
- Keep a backup of your original file before converting so you can roll back if needed.
- Export any critical metadata (EXIF, IPTC, ID3, or captions) because FLAC may not retain it.
- Review known pain points: Not ideal for lossless intermediate editing due to GOP-based compression. Adjust your source file accordingly.
- Note the target resolution and frame rate to avoid unexpected stretching or stutter.
Quality tips
- Pick a bitrate that matches your destination: 128 kbps for speech, 192–256 kbps for music, 320 kbps for archive copies.
- Download the result immediately and open it in the target application to verify everything matches expectations.
Where FLAC fits best
Once you have the converted file, you can plug it straight into archiving cd collections and high-resolution downloads, audiophile music libraries and media servers, and lossless distribution of podcasts or sound libraries. FLAC is the format teams expect in those environments, so you spend less time re-exporting or explaining compatibility issues.
Common FLAC use cases
- Archiving CD collections and high-resolution downloads
- Audiophile music libraries and media servers
- Lossless distribution of podcasts or sound libraries
Tools that open FLAC
- Foobar2000
- Audacity
- dBpoweramp
Frequently asked questions
Does converting MP4 to FLAC reduce quality?
No—FLAC preserves the original fidelity. You still want to open the converted file once to confirm fonts, colors, or audio loudness survived the transfer.
Which bitrate should I pick for FLAC?
Match the bitrate to the destination. 96–128 kbps is fine for speech, 192 kbps balances quality and size for music, and 256–320 kbps keeps critical mixes transparent.
Is there a file size limit for converting MP4?
Yes—uploads up to 150 MB convert reliably in the browser. For larger assets, split them into smaller segments first so the process stays responsive.