MP4 to FLAC converter
Convert MP4 files to FLAC with TLS uploads and automatic deletion. Lossless compressed audio, popular with audiophiles.
Drop a MP4 file, or click to browse
Converts to FLAC · runs live, right now
How it works
Drop your file
Drag a MP4 file in, or click to browse. No account needed to try it.
We convert it
Secure upload, converted to FLAC in our ffmpeg pipeline.
Download the result
Grab your FLAC file immediately, or find it later in your dashboard.
Why convert MP4 to FLAC?
FLAC is lossless, so converting from MP4 won't compound any quality loss on future edits — though it can't restore detail MP4's lossy compression already discarded. The main reason to convert MP4 to FLAC is compatibility: FLAC plays on virtually any device or app without an extra codec, while MP4 isn't built for that. If you're sharing a file with someone else, sending it to a tool that expects a specific format, or archiving it for the long term, FLAC is usually the safer target.
Format comparison
| MP4 | FLAC | |
|---|---|---|
| Extension | .mp4 | .flac |
| MIME type | video/mp4 | audio/flac |
| Compression | lossy compression | lossless compression |
| Category | video | audio |
Common reasons to convert MP4 to FLAC
- Fitting more tracks on a device or app with limited storage
- Meeting a file-size limit for email or upload
- Moving to a format that won't compound further quality loss if you plan to keep editing
Your file, handled carefully
Uploads use TLS in transit and AES-256 SSE-S3 at rest in production (when the production S3 credential gate is enabled), are processed in an isolated job, and deleted on the schedule you choose — as fast as immediately. We don't index, search, or share files between accounts. Read the full security model →
Frequently asked questions
Is converting MP4 to FLAC free?
Yes — the Free plan includes 50 conversions every month, including MP4 to FLAC. Paid plans raise that limit.
Will I lose quality converting MP4 to FLAC?
FLAC is lossless compressed audio, popular with audiophiles. We use the highest-quality encoder settings by default so visual or data loss is minimized.
Do you keep a copy of my file?
Files are deleted automatically based on your plan's retention options. Free accounts can keep results for 1h or 24h; Pro and above add options such as delete-immediately and 7 days.
What is MP4?
The default web and mobile video container.
What happens if a conversion fails?
You get a clear error message and the job is marked failed in your history — we never silently drop a file. Retry is one click. Monthly quotas count attempts (including failures) because processing starts as soon as the job is created.