Convert FLAC to subtitles

Transform your lossless FLAC audio into professional subtitles. Maximum audio quality ensures the most accurate subtitles possible.

SRT & VTT
5-min turnaround
All platforms
Audio
Video
DOCX
SRT/VTT
PDF
53+ Languages
About This Format

Understanding FLAC files

What is a FLAC file?

Lossless audio compression - CD quality at half the size

Free Lossless Audio Codec file (FLAC) is an audio format similar to MP3, but lossless. What does this mean? The audio in a FLAC file is compressed without any loss in quality, whereas a MP3 file compresses the audio but usually lowers the quality of the file by excluding certain frequencies. A FLAC file works similar to how a ZIP file is compressed. Since FLAC is highly optimized for audio, you’ll receive a better compression ratio when compared to the ZIP compression algorithms. You can play compressed FLAC files in your favorite media player (including VLC, your car, or home stereo, or computer) just like you would an MP3 file (without having to uncompress it separately).
FLAC files are one of the fastest and most widely supported lossless audio codecs and is one of the few that are non-proprietary and has a well-documented open-source reference implementation. There are no attached patents for FLAC files. It was developed in 2000 and FLAC files discourage developers to not include any DRM features.

Common Uses

  • Audiophile music collections
  • Music archiving
  • High-fidelity audio
  • Lossless music streaming

Audio Quality

Bit-perfect lossless compression - identical to original

Transcription Tips for FLAC

  • Excellent for transcription - no quality loss from compression
  • Smaller than WAV but same audio quality
  • Well-suited for interview and podcast archiving

Where FLAC Files Come From

  • Bandcamp downloads
  • HD music stores
  • Audio archivists
  • Tidal streaming rips
10x
Faster than real-time
Get your FLAC subtitles in minutes
99%
Accuracy rate
Industry-leading AI for FLAC files
53+
Languages
Subtitles in any language
30+
Export formats
SRT, VTT, FCPXML, and more
How It Works

Create subtitles from FLAC in 6 steps

Step 1

Create account

Sign up for Sonix's free trial. Includes 30 minutes free.

Step 2

Upload file

Upload your FLAC file from your computer or cloud storage.

Step 3

Select language

Choose from 53+ languages spoken in your file.

Step 4

Auto-transcribe

Sonix AI transcribes your FLAC with word-level timestamps.

Step 5

Split subtitles

Customize line length, duration, and subtitle breaks.

Step 6

Export

Download subtitles as SRT, VTT, or other formats.

Common Questions

Everything about FLAC subtitles

What subtitle formats can I export from FLAC?

Sonix exports FLAC transcriptions to SRT, VTT, ASS/SSA, SBV, STL, and more. Choose the format your project requires.

Does FLAC quality affect subtitle accuracy?

Yes! FLAC's lossless audio provides the best possible source for transcription, resulting in the most accurate subtitles. The advantage is most noticeable for challenging audio.

Can I create subtitles from audiophile recordings?

Absolutely! Sonix handles high-quality FLAC recordings perfectly. Your meticulous audio production translates to highly accurate subtitles.

What's the best subtitle format for FLAC content?

SRT is the most widely compatible. For web video, VTT is preferred. Sonix supports both plus many professional formats.

How do I improve subtitle timing from FLAC?

FLAC's pristine audio already provides excellent timing. Use Sonix's visual editor for any fine adjustments.

Can I create hardcoded subtitles from FLAC?

Sonix generates subtitle files you can import into video editors to burn into your video.

Why Sonix

Professional subtitles from FLAC files

Multiple Formats

Export subtitles as SRT, VTT, FCPXML, and more for any platform.

Customizable

Control line length, duration, and style of your subtitles.

Translate

Create subtitles in 53+ languages from your original audio.

Burn-in Option

Permanently embed subtitles into your video with one click.

Related

More ways to convert FLAC files

Other FLAC conversions

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Other file formats

AIF to text
XSPF to text
OPUS to text
WMA to text
MTS to text
WAV to text
AIFC to text
MUS to text
WEBA to text
MP2 to text
See all supported file formats
Reviews

Trusted by content creators

4.98 rating from 211 reviews

My first trial was a video interview with a woman with an Eastern European accent, and I thought there was no way your system would render a good transcription—but it was amazingly accurate!
JP
Jeff P.
Pagosa Springs, CO, USA
I am completely blown away by this platform. I am already telling everyone about it!
DA
Douglas A.
Tillamook, OR, USA
I'm very happy with the experience. The Spanish translations are superb. I'm in awe!
LV
Luis V.
San Jose, Costa Rica
Incredibly fast return! Amazingly accurate transcription and exceptionally affordable!
GS
Guillermina S.
Schenectady, NY USA
Was using another software before, but their prices went up. Your prices are better and the transcription seems more accurate. I also like that you automatically take out all of th...
JM
Josh M.
Grand Junction, CO, USA
Very high accuracy transcription with noisy tapes / accents. The ability to edit as you listen is incredible. I haven't been impressed with code to this extent sin...
JC
Justin C.
St Charles, IL
The best service available for my language (Czech) - thank you very much for saving me a LOT of work!
TF
Tamara F.
Prague, Czech Republic
The process was super easy. I liked that you can upload video file without stripping away the audio first to do it, this of course saves production time. Great job overall for sure!!!
AS
Aaron S.
San Francisco, CA USA
Read more testimonials
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