SHN to SNDT Converter

Decode Shorten into legacy SNDT format online

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Retro Audio

Produce SNDT from lossless SHN — both have retro computing roots, but SNDT serves Atari and DOS platforms.

No Legacy Tools

Create SNDT files in your browser without Atari or DOS software installations.

Secure Files

SHN uploads are erased after conversion. SNDT outputs are purged within 24 hours.

How to convert SHN to SNDT

1

Select files from Computer, Google Drive, Dropbox, URL or by dragging it on the page.

2

Choose sndt or any other format you need as a result (more than 200 formats supported)

3

Let the file convert and you can download your sndt file right afterwards

About formats

Shorten (SHN) is a lossless audio compression codec created by Tony Robinson at SoftSound and first published in 1993, making it one of the earliest practical lossless compressors. The algorithm uses linear prediction to estimate each sample from predecessors, then encodes residuals with Huffman or Golomb-Rice codes. Compression ratios typically fall between 2:1 and 3:1, with the guarantee that decoded output is bit-identical to the original. Shorten gained cultural significance in the late 1990s as the preferred format for trading live concert recordings online — communities like etree.org built entire distribution networks around SHN files, and bands like the Grateful Dead and Phish tacitly endorsed the practice. One advantage was the format's simplicity: encoding and decoding ran fast even on modest Pentium-era hardware. Another strength was deterministic output — the same input always produced the same bytes, making checksums reliable for verifying integrity across thousands of traders. While FLAC eventually superseded Shorten with better compression, seeking support, and embedded metadata, SHN retains historical importance and extensive live music archives in the format still circulate today.
Initial release: 1993
SNDT is the audio format associated with Sndtool, an early MS-DOS sound utility from the early 1990s that appeared alongside the spread of Sound Blaster cards in PCs. Unlike the headerless Sounder format, SNDT files include a brief header with the sample rate and data length — a meaningful improvement that let playback software determine timing automatically. Audio data is stored as 8-bit unsigned PCM, typically at 8000 to 22050 Hz in mono. Sndtool functioned as a simple waveform recorder and player, often distributed as shareware or bundled with sound card drivers. A key advantage over competing DOS audio formats was this self-describing header, which eliminated the guesswork of playing unfamiliar files — a real problem before standardized multimedia frameworks existed. The format was also efficient to decode, requiring no decompression and minimal CPU overhead on the 286 and 386 processors of the time. SNDT files served as building blocks for early PC games and multimedia presentations, where developers needed reliable audio across the limited Sound Blaster hardware ecosystem. Today, SNDT survives in retro software archives and is supported by SoX for conversion to modern formats.
Developer: Sndtool (MS-DOS)
Initial release: 1992

Frequently Asked Questions

What is SNDT?

SNDT is a raw audio format from Atari and DOS sound tools — simple headers with uncompressed audio data.

Why convert SHN to SNDT?

Retro Atari or DOS projects may need SNDT. Lossless SHN gives clean source for the conversion.

What reads SNDT?

Legacy Atari tools, SoX, and retro computing emulators handle SNDT files.

Is quality limited?

SNDT typically handles 8-bit audio — lossless SHN data is adapted to fit legacy specs.

Is the conversion private?

SHN uploads are deleted immediately. SNDT results are removed within 24 hours.