FSSD to TTA Converter
Processing entirely on your device — large files may take a moment.
Convert TTA to FLAC or MP3 for everyday playback. If your files are still in FSSD format, this page is the shortcut: FSSD is a raw 8-bit audio dump format from early UNIX sound experiments — tiny headers, bare samples.
This converter runs entirely in your browser using WebAssembly — your files never leave your device, nothing is uploaded, and there are no watermarks, sign-ups or queues. Drop in several files at once to convert them as a batch.
How FSSD compares to TTA
| FSSD | TTA | |
|---|---|---|
| Structure | FSSD Audio container | TTA header + frame blocks + ID3 |
| Compatibility | ffmpeg, archive tools | ffmpeg, TTA tools, fb2k |
| Best for | Rescuing legacy audio | Regional archive migration |
How to convert FSSD to TTA
- 1
Select your files
Drag & drop your FSSD files onto the area above, or click to browse. You can add multiple files at once for batch conversion.
- 2
Convert instantly
Click "Convert to TTA". The conversion runs entirely inside your browser using WebAssembly — no upload, no queue, no waiting.
- 3
Download results
Download each converted TTA file individually, or grab everything at once as a ZIP archive.
About the FSSD format
FSSD is a raw 8-bit audio dump format from early UNIX sound experiments — tiny headers, bare samples.
ffmpeg decodes it natively inside your browser — the audio track is re-encoded to your chosen format with nothing ever uploaded.
+ Strengths
- ✓Decoded natively by ffmpeg
- ✓Runs entirely in your browser
- ✓Free, private, no watermarks
! Limitations
- −Legacy niche format
- −Modern tools rarely open it
- −Keep the original for archival round-trips
About the TTA format
TTA (True Audio) is a no-frills real-time lossless compressor: simple 32-bit crypto-free checksums, multi-threadable encoding and IDs at both frame and file level. It filled the lossless niche on slow connections and in Russian archive communities where FLAC arrived late.
Decoding is near-instant and lossless, so converting TTA to FLAC or MP3 costs nothing in fidelity — the audio is identical, the compatibility is finally universal.
+ Strengths
- ✓Real-time speed on modest hardware
- ✓Simple, well-documented container
- ✓Error-tolerant frame structure
! Limitations
- −Compression ratios behind modern codecs
- −Ecosystem largely inactive
- −Tagging support is weak
Why convert FSSD to TTA?
Think of it as moving your file to the container that fits the job. Legacy niche format TTA works differently: Real-time speed on modest hardware If any of that sounds like your task, run the conversion — it takes seconds and nothing leaves your device.
Frequently asked questions
Is this FSSD to TTA converter really free?
Yes — completely free, with no sign-up, no watermark and no daily conversion limits. The site is supported by advertising.
Are my files uploaded to a server?
No. The conversion runs entirely inside your browser using WebAssembly, so your files never leave your device — that is what makes it instant and private.
Does it work on Windows, Mac, iPhone and Android?
Yes. Anything with a modern browser works: Windows, macOS, Linux, Android and iOS. No software installation is required.
Is there a file size limit for FSSD to TTA?
The only limit is your device's memory, since nothing is uploaded. Files up to a few hundred megabytes work fine on a modern desktop browser; very large files simply take a little longer.
Will converting FSSD to TTA reduce audio quality?
If TTA is lossless, the output contains everything the FSSD file contains — no further loss is added. If TTA is lossy, one recompression pass is unavoidable; the quality slider controls how much. Loss that already happened in the source file can never be undone by converting.
Can I convert a whole folder of FSSD files?
You can select many files at once and they are processed in a single batch. Output files land in one ZIP download when there is more than one result.