FLAC in · SRT and VTT out

Turn a FLAC master into an SRT caption file.

FLAC is where recordings live when nothing may be discarded: oral history collections, interview masters, deposits held for decades. Upload one directly, with no lossy copy in between, and download cues timed to the speech. Files beyond 500 MB go through the upload page instead. Free for the first transcript, any length · look at the preview first, no signup · $8 covers 1,000 minutes, held indefinitely.

Lossless audio in SRT and VTT out Word-level timestamps 5 GB per file

How it works

FLAC in, caption file out.

The archive master goes in as it is, with no intermediate copy to manage.

1

Upload the master

Straight from the archive drive. Up to 500 MB in the box above; a long deposit carries on at the upload page.

2

Read the transcript

Every word comes back with its own timestamp, usually a few minutes of waiting per hour held. The preview opens without an account.

3

Take the cues, or the document

SRT and VTT for timed text; TXT, DOCX, JSON and Markdown when the collection needs a readable companion file.

FLAC specifics

Lossless, but roughly half the weight of a WAV.

FLAC compresses without throwing anything away, which typically halves what the same recording would occupy as a WAV. A stereo interview at 48 kHz lands somewhere near half a gigabyte an hour, so the 5 GB ceiling sits around eight to ten hours — close enough to the 10-hour per-file limit that the two arrive together. Archive masters at 96 kHz and 24-bit are heavier and can meet 5 GB in about three hours.

Does lossless read back better than a lossy copy?

Not measurably, and it is worth saying plainly. What determines how well speech is captured is the recording itself: microphone placement, room noise, the condition of the original tape, and how often people talk over each other. A clean compressed copy and its lossless master generally produce the same words. Upload the FLAC because it is the file you already have, not because it buys accuracy.

Where FLAC files come from

Past the ceiling

If a single deposit runs beyond 10 hours or 5 GB, split it at a natural break and caption the parts. See also audio to SRT for any sound file, video to SRT for a recording with picture, YouTube to SRT for a public link, the caption generator as the front door, and the FLAC format page.

Where the file goes

What an archive caption file is good for.

Finding aids and catalogue entries

A DOCX or TXT export gives a collection searchable text, so a recording can be found by what was said in it.

Listening room players

A VTT track beside a web player lets a visitor read along with a recording that was never meant to be watched.

Excerpts turned into video

When a clip from a collection becomes a short film, the cues are already timed to the master it came from.

Citations with a timecode

Word-level timing makes it possible to cite the exact second a phrase occurs, which matters in scholarly use.

Pricing

What captioning a FLAC master costs

The opening transcript is free in full at any length. After it, 1,000 minutes at $8, 2,000 at $12, 5,000 at $24, bought once and never expiring.

Recording$8 pack$12 pack$24 pack
35-minute oral history$0.28$0.21$0.17
1-hour interview master$0.48$0.36$0.29
2-hour session$0.96$0.72$0.58
8-hour archive reel$3.84$2.88$2.30

Price follows runtime, so lossless costs no more than a compressed copy of the same length. See pricing.

FAQ

FLAC to SRT, answered.

How do I caption a FLAC recording?

Upload the file on this page, look over the preview without an account, open the transcript in full with a free one, and download the SRT.

Does lossless audio give a more accurate transcript?

Generally no. Microphone placement, background noise and overlapping speech matter far more than whether the file was compressed.

Is the speaker marked in the caption file?

No. The SRT, VTT, TXT and DOCX downloads carry the words and their timings. Speakers are identified and named in the summary, key quotes and chapters.

How many hours of FLAC fit in one file?

Around eight to ten hours at typical interview settings before 5 GB is reached, and fewer at high sample rates. The other ceiling is 10 hours per file.

Can I get a Word document for the catalogue?

Yes, a real .docx, plus TXT and Markdown from the same job. Nothing is charged extra for additional formats.

What does an hour of archive audio cost?

One hour costs $0.48 from the $8 pack, or $0.29 at the $24 pack rate. Credits suit work that arrives in batches.

Subtitles and captions

Every page in this set uses the same upload box and the same export. All subtitle pages

From a link or a file

Make subtitles

WebVTT

For a platform or an editor

Convert a subtitle file

Formats and rules

By language

Upload the FLAC. Download the SRT.

Instant preview, no signup. The opening transcript is free, at any length.

Looking for a transcription service?

For the recordings you have now: see our transcription service with prices and turnaround, an audio transcription service that takes links or files and an online transcription service with nothing to install.